TSTP Solution File: SEU546^1 by Satallax---3.5

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%------------------------------------------------------------------------------
% File     : Satallax---3.5
% Problem  : SEU546^1 : TPTP v8.1.0. Released v3.7.0.
% Transfm  : none
% Format   : tptp:raw
% Command  : satallax -E eprover-ho -P picomus -M modes -p tstp -t %d %s

% Computer : n006.cluster.edu
% Model    : x86_64 x86_64
% CPU      : Intel(R) Xeon(R) CPU E5-2620 v4 2.10GHz
% Memory   : 8042.1875MB
% OS       : Linux 3.10.0-693.el7.x86_64
% CPULimit : 300s
% WCLimit  : 600s
% DateTime : Tue Jul 19 13:53:07 EDT 2022

% Result   : Theorem 187.84s 187.82s
% Output   : Proof 187.84s
% Verified : 
% SZS Type : Refutation
%            Derivation depth      :   68
%            Number of leaves      :  226
% Syntax   : Number of formulae    :  296 ( 157 unt;  13 typ;  65 def)
%            Number of atoms       : 5260 (1514 equ;   0 cnn)
%            Maximal formula atoms :  144 (  18 avg)
%            Number of connectives : 21733 (3349   ~;  16   |;   0   &;11546   @)
%                                         (  15 <=>;6807  =>;   0  <=;   0 <~>)
%            Maximal formula depth :   74 (  12 avg)
%            Number of types       :    2 (   0 usr)
%            Number of type conns  :  926 ( 926   >;   0   *;   0   +;   0  <<)
%            Number of symbols     :   95 (  93 usr;  85 con; 0-2 aty)
%            Number of variables   : 6824 (  41   ^6783   !;   0   ?;6824   :)

% Comments : 
%------------------------------------------------------------------------------
thf(ty_eigen__2,type,
    eigen__2: $i ).

thf(ty_setunion,type,
    setunion: $i > $i ).

thf(ty_eigen__1,type,
    eigen__1: $i ).

thf(ty_eigen__0,type,
    eigen__0: $i > $o ).

thf(ty_emptyset,type,
    emptyset: $i ).

thf(ty_descr,type,
    descr: ( $i > $o ) > $i ).

thf(ty_dsetconstr,type,
    dsetconstr: $i > ( $i > $o ) > $i ).

thf(ty_powerset,type,
    powerset: $i > $i ).

thf(ty_omega,type,
    omega: $i ).

thf(ty_prop2set,type,
    prop2set: $o > $i ).

thf(ty_set2prop,type,
    set2prop: $i > $o ).

thf(ty_in,type,
    in: $i > $i > $o ).

thf(ty_setadjoin,type,
    setadjoin: $i > $i > $i ).

thf(h0,assumption,
    ! [X1: $i > $o,X2: $i] :
      ( ( X1 @ X2 )
     => ( X1 @ ( eps__0 @ X1 ) ) ),
    introduced(assumption,[]) ).

thf(eigendef_eigen__2,definition,
    ( eigen__2
    = ( eps__0
      @ ^ [X1: $i] :
          ~ ( ( eigen__0 @ X1 )
           => ( eigen__1 = X1 ) ) ) ),
    introduced(definition,[new_symbols(definition,[eigen__2])]) ).

thf(sP1,plain,
    ( sP1
  <=> ! [X1: $i] :
        ( ( eigen__0 @ X1 )
        = ( X1 = eigen__1 ) ) ),
    introduced(definition,[new_symbols(definition,[sP1])]) ).

thf(sP2,plain,
    ( sP2
  <=> ( eigen__0 @ eigen__1 ) ),
    introduced(definition,[new_symbols(definition,[sP2])]) ).

thf(sP3,plain,
    ( sP3
  <=> ! [X1: $i,X2: $i] :
        ( ( X1 = X2 )
       => ( X2 = X1 ) ) ),
    introduced(definition,[new_symbols(definition,[sP3])]) ).

thf(sP4,plain,
    ( sP4
  <=> ! [X1: $i] :
        ( ( eigen__2 = X1 )
       => ( X1 = eigen__2 ) ) ),
    introduced(definition,[new_symbols(definition,[sP4])]) ).

thf(sP5,plain,
    ( sP5
  <=> ( ( eigen__0 @ eigen__2 )
     => ( eigen__1 = eigen__2 ) ) ),
    introduced(definition,[new_symbols(definition,[sP5])]) ).

thf(sP6,plain,
    ( sP6
  <=> ( eigen__1 = eigen__1 ) ),
    introduced(definition,[new_symbols(definition,[sP6])]) ).

thf(sP7,plain,
    ( sP7
  <=> ( ( eigen__0 @ eigen__2 )
      = ( eigen__2 = eigen__1 ) ) ),
    introduced(definition,[new_symbols(definition,[sP7])]) ).

thf(sP8,plain,
    ( sP8
  <=> ( eigen__1 = eigen__2 ) ),
    introduced(definition,[new_symbols(definition,[sP8])]) ).

thf(sP9,plain,
    ( sP9
  <=> ( sP2
     => ~ ! [X1: $i] :
            ( ( eigen__0 @ X1 )
           => ( eigen__1 = X1 ) ) ) ),
    introduced(definition,[new_symbols(definition,[sP9])]) ).

thf(sP10,plain,
    ( sP10
  <=> ( ( eigen__2 = eigen__1 )
     => sP8 ) ),
    introduced(definition,[new_symbols(definition,[sP10])]) ).

thf(sP11,plain,
    ( sP11
  <=> ( eigen__2 = eigen__1 ) ),
    introduced(definition,[new_symbols(definition,[sP11])]) ).

thf(sP12,plain,
    ( sP12
  <=> ! [X1: $i] :
        ( ( eigen__0 @ X1 )
       => ( eigen__1 = X1 ) ) ),
    introduced(definition,[new_symbols(definition,[sP12])]) ).

thf(sP13,plain,
    ( sP13
  <=> ! [X1: $i] :
        ( ( eigen__0 @ X1 )
       => ~ ! [X2: $i] :
              ( ( eigen__0 @ X2 )
             => ( X1 = X2 ) ) ) ),
    introduced(definition,[new_symbols(definition,[sP13])]) ).

thf(sP14,plain,
    ( sP14
  <=> ( eigen__0 @ eigen__2 ) ),
    introduced(definition,[new_symbols(definition,[sP14])]) ).

thf(sP15,plain,
    ( sP15
  <=> ( sP2 = sP6 ) ),
    introduced(definition,[new_symbols(definition,[sP15])]) ).

thf(def_exu,definition,
    ( exu
    = ( ^ [X1: $i > $o] :
          ~ ! [X2: $i] :
              ( ( X1 @ X2 )
             => ~ ! [X3: $i] :
                    ( ( X1 @ X3 )
                   => ( X2 = X3 ) ) ) ) ) ).

thf(def_setextAx,definition,
    ( setextAx
    = ( ! [X1: $i,X2: $i] :
          ( ! [X3: $i] :
              ( ( in @ X3 @ X1 )
              = ( in @ X3 @ X2 ) )
         => ( X1 = X2 ) ) ) ) ).

thf(def_emptysetAx,definition,
    ( emptysetAx
    = ( ! [X1: $i] :
          ~ ( in @ X1 @ emptyset ) ) ) ).

thf(def_setadjoinAx,definition,
    ( setadjoinAx
    = ( ! [X1: $i,X2: $i,X3: $i] :
          ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
          = ( ( X3 != X1 )
           => ( in @ X3 @ X2 ) ) ) ) ) ).

thf(def_powersetAx,definition,
    ( powersetAx
    = ( ! [X1: $i,X2: $i] :
          ( ( in @ X2 @ ( powerset @ X1 ) )
          = ( ! [X3: $i] :
                ( ( in @ X3 @ X2 )
               => ( in @ X3 @ X1 ) ) ) ) ) ) ).

thf(def_setunionAx,definition,
    ( setunionAx
    = ( ! [X1: $i,X2: $i] :
          ( ( in @ X2 @ ( setunion @ X1 ) )
          = ( ~ ! [X3: $i] :
                  ( ( in @ X2 @ X3 )
                 => ~ ( in @ X3 @ X1 ) ) ) ) ) ) ).

thf(def_omega0Ax,definition,
    ( omega0Ax
    = ( in @ emptyset @ omega ) ) ).

thf(def_omegaSAx,definition,
    ( omegaSAx
    = ( ! [X1: $i] :
          ( ( in @ X1 @ omega )
         => ( in @ ( setadjoin @ X1 @ X1 ) @ omega ) ) ) ) ).

thf(def_omegaIndAx,definition,
    ( omegaIndAx
    = ( ! [X1: $i] :
          ( ~ ( ( in @ emptyset @ X1 )
             => ~ ! [X2: $i] :
                    ( ~ ( ( in @ X2 @ omega )
                       => ~ ( in @ X2 @ X1 ) )
                   => ( in @ ( setadjoin @ X2 @ X2 ) @ X1 ) ) )
         => ! [X2: $i] :
              ( ( in @ X2 @ omega )
             => ( in @ X2 @ X1 ) ) ) ) ) ).

thf(def_replAx,definition,
    ( replAx
    = ( ! [X1: $i > $i > $o,X2: $i] :
          ( ! [X3: $i] :
              ( ( in @ X3 @ X2 )
             => ( exu @ ( X1 @ X3 ) ) )
         => ~ ! [X3: $i] :
                ~ ! [X4: $i] :
                    ( ( in @ X4 @ X3 )
                    = ( ~ ! [X5: $i] :
                            ( ( in @ X5 @ X2 )
                           => ~ ( X1 @ X5 @ X4 ) ) ) ) ) ) ) ).

thf(def_foundationAx,definition,
    ( foundationAx
    = ( ! [X1: $i] :
          ( ~ ! [X2: $i] :
                ~ ( in @ X2 @ X1 )
         => ~ ! [X2: $i] :
                ( ( in @ X2 @ X1 )
               => ~ ! [X3: $i] :
                      ( ( in @ X3 @ X2 )
                     => ~ ( in @ X3 @ X1 ) ) ) ) ) ) ).

thf(def_wellorderingAx,definition,
    ( wellorderingAx
    = ( ! [X1: $i] :
          ~ ! [X2: $i] :
              ( ~ ( ~ ( ! [X3: $i] :
                          ( ( in @ X3 @ X2 )
                         => ! [X4: $i] :
                              ( ( in @ X4 @ X3 )
                             => ( in @ X4 @ X1 ) ) )
                     => ~ ! [X3: $i,X4: $i] :
                            ( ~ ( ( in @ X3 @ X1 )
                               => ~ ( in @ X4 @ X1 ) )
                           => ( ! [X5: $i] :
                                  ( ( in @ X5 @ X2 )
                                 => ( ( in @ X3 @ X5 )
                                    = ( in @ X4 @ X5 ) ) )
                             => ( X3 = X4 ) ) ) )
                 => ~ ! [X3: $i,X4: $i] :
                        ( ~ ( ( in @ X3 @ X2 )
                           => ~ ( in @ X4 @ X2 ) )
                       => ( ~ ! [X5: $i] :
                                ( ( in @ X5 @ X3 )
                               => ( in @ X5 @ X4 ) )
                         => ! [X5: $i] :
                              ( ( in @ X5 @ X4 )
                             => ( in @ X5 @ X3 ) ) ) ) )
             => ~ ! [X3: $i] :
                    ( ~ ( ! [X4: $i] :
                            ( ( in @ X4 @ X3 )
                           => ( in @ X4 @ X1 ) )
                       => ! [X4: $i] :
                            ~ ( in @ X4 @ X3 ) )
                   => ~ ! [X4: $i,X5: $i] :
                          ( ~ ( ~ ( ( in @ X4 @ X2 )
                                 => ~ ( in @ X5 @ X3 ) )
                             => ~ ! [X6: $i] :
                                    ( ( in @ X6 @ X4 )
                                   => ~ ( in @ X6 @ X3 ) ) )
                         => ~ ! [X6: $i] :
                                ( ( in @ X6 @ X2 )
                               => ( ~ ! [X7: $i] :
                                        ( ( in @ X7 @ X6 )
                                       => ( in @ X7 @ X4 ) )
                                 => ( in @ X5 @ X6 ) ) ) ) ) ) ) ) ).

thf(def_descrp,definition,
    ( descrp
    = ( ! [X1: $i > $o] :
          ( ( exu @ X1 )
         => ( X1 @ ( descr @ X1 ) ) ) ) ) ).

thf(def_dsetconstrI,definition,
    ( dsetconstrI
    = ( ! [X1: $i,X2: $i > $o,X3: $i] :
          ( ( in @ X3 @ X1 )
         => ( ( X2 @ X3 )
           => ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) ) ) ) ) ) ).

thf(def_dsetconstrEL,definition,
    ( dsetconstrEL
    = ( ! [X1: $i,X2: $i > $o,X3: $i] :
          ( ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) )
         => ( in @ X3 @ X1 ) ) ) ) ).

thf(def_dsetconstrER,definition,
    ( dsetconstrER
    = ( ! [X1: $i,X2: $i > $o,X3: $i] :
          ( ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) )
         => ( X2 @ X3 ) ) ) ) ).

thf(def_exuE1,definition,
    ( exuE1
    = ( ! [X1: $i > $o] :
          ( ( exu @ X1 )
         => ~ ! [X2: $i] :
                ( ( X1 @ X2 )
               => ~ ! [X3: $i] :
                      ( ( X1 @ X3 )
                     => ( X2 = X3 ) ) ) ) ) ) ).

thf(def_prop2setE,definition,
    ( prop2setE
    = ( ! [X1: $o,X2: $i] :
          ( ( in @ X2 @ ( prop2set @ X1 ) )
         => X1 ) ) ) ).

thf(def_emptysetE,definition,
    ( emptysetE
    = ( ! [X1: $i] :
          ( ( in @ X1 @ emptyset )
         => ! [X2: $o] : X2 ) ) ) ).

thf(def_emptysetimpfalse,definition,
    ( emptysetimpfalse
    = ( ! [X1: $i] :
          ~ ( in @ X1 @ emptyset ) ) ) ).

thf(def_notinemptyset,definition,
    ( notinemptyset
    = ( ! [X1: $i] :
          ~ ( in @ X1 @ emptyset ) ) ) ).

thf(def_exuE3e,definition,
    ( exuE3e
    = ( ! [X1: $i > $o] :
          ( ( exu @ X1 )
         => ~ ! [X2: $i] :
                ~ ( X1 @ X2 ) ) ) ) ).

thf(def_setext,definition,
    ( setext
    = ( ! [X1: $i,X2: $i] :
          ( ! [X3: $i] :
              ( ( in @ X3 @ X1 )
             => ( in @ X3 @ X2 ) )
         => ( ! [X3: $i] :
                ( ( in @ X3 @ X2 )
               => ( in @ X3 @ X1 ) )
           => ( X1 = X2 ) ) ) ) ) ).

thf(def_emptyI,definition,
    ( emptyI
    = ( ! [X1: $i] :
          ( ! [X2: $i] :
              ~ ( in @ X2 @ X1 )
         => ( X1 = emptyset ) ) ) ) ).

thf(def_noeltsimpempty,definition,
    ( noeltsimpempty
    = ( ! [X1: $i] :
          ( ! [X2: $i] :
              ~ ( in @ X2 @ X1 )
         => ( X1 = emptyset ) ) ) ) ).

thf(def_setbeta,definition,
    ( setbeta
    = ( ! [X1: $i,X2: $i > $o,X3: $i] :
          ( ( in @ X3 @ X1 )
         => ( ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) )
            = ( X2 @ X3 ) ) ) ) ) ).

thf(def_nonempty,definition,
    ( nonempty
    = ( ^ [X1: $i] : ( X1 != emptyset ) ) ) ).

thf(def_nonemptyE1,definition,
    ( nonemptyE1
    = ( ! [X1: $i] :
          ( ( nonempty @ X1 )
         => ~ ! [X2: $i] :
                ~ ( in @ X2 @ X1 ) ) ) ) ).

thf(def_nonemptyI,definition,
    ( nonemptyI
    = ( ! [X1: $i,X2: $i > $o,X3: $i] :
          ( ( in @ X3 @ X1 )
         => ( ( X2 @ X3 )
           => ( nonempty @ ( dsetconstr @ X1 @ X2 ) ) ) ) ) ) ).

thf(def_nonemptyI1,definition,
    ( nonemptyI1
    = ( ! [X1: $i] :
          ( ~ ! [X2: $i] :
                ~ ( in @ X2 @ X1 )
         => ( nonempty @ X1 ) ) ) ) ).

thf(def_setadjoinIL,definition,
    ( setadjoinIL
    = ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ X2 ) ) ) ) ).

thf(def_emptyinunitempty,definition,
    ( emptyinunitempty
    = ( in @ emptyset @ ( setadjoin @ emptyset @ emptyset ) ) ) ).

thf(def_setadjoinIR,definition,
    ( setadjoinIR
    = ( ! [X1: $i,X2: $i,X3: $i] :
          ( ( in @ X3 @ X2 )
         => ( in @ X3 @ ( setadjoin @ X1 @ X2 ) ) ) ) ) ).

thf(def_setadjoinE,definition,
    ( setadjoinE
    = ( ! [X1: $i,X2: $i,X3: $i] :
          ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
         => ! [X4: $o] :
              ( ( ( X3 = X1 )
               => X4 )
             => ( ( ( in @ X3 @ X2 )
                 => X4 )
               => X4 ) ) ) ) ) ).

thf(def_setadjoinOr,definition,
    ( setadjoinOr
    = ( ! [X1: $i,X2: $i,X3: $i] :
          ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
         => ( ( X3 != X1 )
           => ( in @ X3 @ X2 ) ) ) ) ) ).

thf(def_setoftrueEq,definition,
    ( setoftrueEq
    = ( ! [X1: $i] :
          ( ( dsetconstr @ X1
            @ ^ [X2: $i] : ~ $false )
          = X1 ) ) ) ).

thf(def_powersetI,definition,
    ( powersetI
    = ( ! [X1: $i,X2: $i] :
          ( ! [X3: $i] :
              ( ( in @ X3 @ X2 )
             => ( in @ X3 @ X1 ) )
         => ( in @ X2 @ ( powerset @ X1 ) ) ) ) ) ).

thf(def_emptyinPowerset,definition,
    ( emptyinPowerset
    = ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) ) ) ) ).

thf(def_emptyInPowerset,definition,
    ( emptyInPowerset
    = ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) ) ) ) ).

thf(def_powersetE,definition,
    ( powersetE
    = ( ! [X1: $i,X2: $i,X3: $i] :
          ( ( in @ X2 @ ( powerset @ X1 ) )
         => ( ( in @ X3 @ X2 )
           => ( in @ X3 @ X1 ) ) ) ) ) ).

thf(def_setunionI,definition,
    ( setunionI
    = ( ! [X1: $i,X2: $i,X3: $i] :
          ( ( in @ X2 @ X3 )
         => ( ( in @ X3 @ X1 )
           => ( in @ X2 @ ( setunion @ X1 ) ) ) ) ) ) ).

thf(def_setunionE,definition,
    ( setunionE
    = ( ! [X1: $i,X2: $i] :
          ( ( in @ X2 @ ( setunion @ X1 ) )
         => ! [X3: $o] :
              ( ! [X4: $i] :
                  ( ( in @ X2 @ X4 )
                 => ( ( in @ X4 @ X1 )
                   => X3 ) )
             => X3 ) ) ) ) ).

thf(def_subPowSU,definition,
    ( subPowSU
    = ( ! [X1: $i,X2: $i] :
          ( ( in @ X2 @ X1 )
         => ( in @ X2 @ ( powerset @ ( setunion @ X1 ) ) ) ) ) ) ).

thf(def_exuE2,definition,
    ( exuE2
    = ( ! [X1: $i > $o] :
          ( ( exu @ X1 )
         => ~ ! [X2: $i] :
                ~ ! [X3: $i] :
                    ( ( X1 @ X3 )
                    = ( X3 = X2 ) ) ) ) ) ).

thf(def_nonemptyImpWitness,definition,
    ( nonemptyImpWitness
    = ( ! [X1: $i] :
          ( ( nonempty @ X1 )
         => ~ ! [X2: $i] :
                ~ ( in @ X2 @ X1 ) ) ) ) ).

thf(def_uniqinunit,definition,
    ( uniqinunit
    = ( ! [X1: $i,X2: $i] :
          ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
         => ( X1 = X2 ) ) ) ) ).

thf(def_notinsingleton,definition,
    ( notinsingleton
    = ( ! [X1: $i,X2: $i] :
          ( ( X1 != X2 )
         => ~ ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) ) ) ) ).

thf(def_eqinunit,definition,
    ( eqinunit
    = ( ! [X1: $i,X2: $i] :
          ( ( X1 = X2 )
         => ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) ) ) ) ) ).

thf(def_singletonsswitch,definition,
    ( singletonsswitch
    = ( ! [X1: $i,X2: $i] :
          ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
         => ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) ) ) ) ).

thf(def_upairsetE,definition,
    ( upairsetE
    = ( ! [X1: $i,X2: $i,X3: $i] :
          ( ( in @ X3 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
         => ( ( X3 != X1 )
           => ( X3 = X2 ) ) ) ) ) ).

thf(def_upairsetIL,definition,
    ( upairsetIL
    = ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) ) ) ) ).

thf(def_upairsetIR,definition,
    ( upairsetIR
    = ( ! [X1: $i,X2: $i] : ( in @ X2 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) ) ) ) ).

thf(def_emptyE1,definition,
    ( emptyE1
    = ( ! [X1: $i,X2: $i > $o] :
          ( ~ ! [X3: $i] :
                ( ( in @ X3 @ X1 )
               => ~ ( X2 @ X3 ) )
         => ( ( dsetconstr @ X1 @ X2 )
           != emptyset ) ) ) ) ).

thf(def_vacuousDall,definition,
    ( vacuousDall
    = ( ! [X1: $i > $o,X2: $i] :
          ( ( in @ X2 @ emptyset )
         => ( X1 @ X2 ) ) ) ) ).

thf(def_quantDeMorgan1,definition,
    ( quantDeMorgan1
    = ( ! [X1: $i,X2: $i > $o] :
          ( ~ ! [X3: $i] :
                ( ( in @ X3 @ X1 )
               => ( X2 @ X3 ) )
         => ~ ! [X3: $i] :
                ( ( in @ X3 @ X1 )
               => ( X2 @ X3 ) ) ) ) ) ).

thf(def_quantDeMorgan2,definition,
    ( quantDeMorgan2
    = ( ! [X1: $i,X2: $i > $o] :
          ( ! [X3: $i] :
              ( ( in @ X3 @ X1 )
             => ~ ( X2 @ X3 ) )
         => ! [X3: $i] :
              ( ( in @ X3 @ X1 )
             => ~ ( X2 @ X3 ) ) ) ) ) ).

thf(def_quantDeMorgan3,definition,
    ( quantDeMorgan3
    = ( ! [X1: $i,X2: $i > $o] :
          ( ! [X3: $i] :
              ( ( in @ X3 @ X1 )
             => ~ ( X2 @ X3 ) )
         => ! [X3: $i] :
              ( ( in @ X3 @ X1 )
             => ~ ( X2 @ X3 ) ) ) ) ) ).

thf(def_quantDeMorgan4,definition,
    ( quantDeMorgan4
    = ( ! [X1: $i,X2: $i > $o] :
          ( ~ ! [X3: $i] :
                ( ( in @ X3 @ X1 )
               => ( X2 @ X3 ) )
         => ~ ! [X3: $i] :
                ( ( in @ X3 @ X1 )
               => ( X2 @ X3 ) ) ) ) ) ).

thf(def_prop2setI,definition,
    ( prop2setI
    = ( ! [X1: $o] :
          ( X1
         => ( in @ emptyset @ ( prop2set @ X1 ) ) ) ) ) ).

thf(def_prop2set2propI,definition,
    ( prop2set2propI
    = ( ! [X1: $o] :
          ( X1
         => ( set2prop @ ( prop2set @ X1 ) ) ) ) ) ).

thf(def_notdexE,definition,
    ( notdexE
    = ( ! [X1: $i,X2: $i > $o] :
          ( ! [X3: $i] :
              ( ( in @ X3 @ X1 )
             => ~ ( X2 @ X3 ) )
         => ! [X3: $i] :
              ( ( in @ X3 @ X1 )
             => ~ ( X2 @ X3 ) ) ) ) ) ).

thf(def_notdallE,definition,
    ( notdallE
    = ( ! [X1: $i,X2: $i > $o] :
          ( ~ ! [X3: $i] :
                ( ( in @ X3 @ X1 )
               => ( X2 @ X3 ) )
         => ~ ! [X3: $i] :
                ( ( in @ X3 @ X1 )
               => ( X2 @ X3 ) ) ) ) ) ).

thf(def_exuI1,definition,
    ( exuI1
    = ( ! [X1: $i > $o] :
          ( ~ ! [X2: $i] :
                ( ( X1 @ X2 )
               => ~ ! [X3: $i] :
                      ( ( X1 @ X3 )
                     => ( X2 = X3 ) ) )
         => ( exu @ X1 ) ) ) ) ).

thf(def_exuI3,definition,
    ( exuI3
    = ( ! [X1: $i > $o] :
          ( ~ ! [X2: $i] :
                ~ ( X1 @ X2 )
         => ( ! [X2: $i,X3: $i] :
                ( ( X1 @ X2 )
               => ( ( X1 @ X3 )
                 => ( X2 = X3 ) ) )
           => ( exu @ X1 ) ) ) ) ) ).

thf(exuI2,conjecture,
    ( ! [X1: $i,X2: $i] :
        ( ! [X3: $i] :
            ( ( in @ X3 @ X1 )
            = ( in @ X3 @ X2 ) )
       => ( X1 = X2 ) )
   => ( ! [X1: $i] :
          ~ ( in @ X1 @ emptyset )
     => ( ! [X1: $i,X2: $i,X3: $i] :
            ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
            = ( ( X3 != X1 )
             => ( in @ X3 @ X2 ) ) )
       => ( ! [X1: $i,X2: $i] :
              ( ( in @ X2 @ ( powerset @ X1 ) )
              = ( ! [X3: $i] :
                    ( ( in @ X3 @ X2 )
                   => ( in @ X3 @ X1 ) ) ) )
         => ( ! [X1: $i,X2: $i] :
                ( ( in @ X2 @ ( setunion @ X1 ) )
                = ( ~ ! [X3: $i] :
                        ( ( in @ X2 @ X3 )
                       => ~ ( in @ X3 @ X1 ) ) ) )
           => ( ( in @ emptyset @ omega )
             => ( ! [X1: $i] :
                    ( ( in @ X1 @ omega )
                   => ( in @ ( setadjoin @ X1 @ X1 ) @ omega ) )
               => ( ! [X1: $i] :
                      ( ~ ( ( in @ emptyset @ X1 )
                         => ~ ! [X2: $i] :
                                ( ~ ( ( in @ X2 @ omega )
                                   => ~ ( in @ X2 @ X1 ) )
                               => ( in @ ( setadjoin @ X2 @ X2 ) @ X1 ) ) )
                     => ! [X2: $i] :
                          ( ( in @ X2 @ omega )
                         => ( in @ X2 @ X1 ) ) )
                 => ( ! [X1: $i > $i > $o,X2: $i] :
                        ( ! [X3: $i] :
                            ( ( in @ X3 @ X2 )
                           => ~ ! [X4: $i] :
                                  ( ( X1 @ X3 @ X4 )
                                 => ~ ! [X5: $i] :
                                        ( ( X1 @ X3 @ X5 )
                                       => ( X4 = X5 ) ) ) )
                       => ~ ! [X3: $i] :
                              ~ ! [X4: $i] :
                                  ( ( in @ X4 @ X3 )
                                  = ( ~ ! [X5: $i] :
                                          ( ( in @ X5 @ X2 )
                                         => ~ ( X1 @ X5 @ X4 ) ) ) ) )
                   => ( ! [X1: $i] :
                          ( ~ ! [X2: $i] :
                                ~ ( in @ X2 @ X1 )
                         => ~ ! [X2: $i] :
                                ( ( in @ X2 @ X1 )
                               => ~ ! [X3: $i] :
                                      ( ( in @ X3 @ X2 )
                                     => ~ ( in @ X3 @ X1 ) ) ) )
                     => ( ! [X1: $i] :
                            ~ ! [X2: $i] :
                                ( ~ ( ~ ( ! [X3: $i] :
                                            ( ( in @ X3 @ X2 )
                                           => ! [X4: $i] :
                                                ( ( in @ X4 @ X3 )
                                               => ( in @ X4 @ X1 ) ) )
                                       => ~ ! [X3: $i,X4: $i] :
                                              ( ~ ( ( in @ X3 @ X1 )
                                                 => ~ ( in @ X4 @ X1 ) )
                                             => ( ! [X5: $i] :
                                                    ( ( in @ X5 @ X2 )
                                                   => ( ( in @ X3 @ X5 )
                                                      = ( in @ X4 @ X5 ) ) )
                                               => ( X3 = X4 ) ) ) )
                                   => ~ ! [X3: $i,X4: $i] :
                                          ( ~ ( ( in @ X3 @ X2 )
                                             => ~ ( in @ X4 @ X2 ) )
                                         => ( ~ ! [X5: $i] :
                                                  ( ( in @ X5 @ X3 )
                                                 => ( in @ X5 @ X4 ) )
                                           => ! [X5: $i] :
                                                ( ( in @ X5 @ X4 )
                                               => ( in @ X5 @ X3 ) ) ) ) )
                               => ~ ! [X3: $i] :
                                      ( ~ ( ! [X4: $i] :
                                              ( ( in @ X4 @ X3 )
                                             => ( in @ X4 @ X1 ) )
                                         => ! [X4: $i] :
                                              ~ ( in @ X4 @ X3 ) )
                                     => ~ ! [X4: $i,X5: $i] :
                                            ( ~ ( ~ ( ( in @ X4 @ X2 )
                                                   => ~ ( in @ X5 @ X3 ) )
                                               => ~ ! [X6: $i] :
                                                      ( ( in @ X6 @ X4 )
                                                     => ~ ( in @ X6 @ X3 ) ) )
                                           => ~ ! [X6: $i] :
                                                  ( ( in @ X6 @ X2 )
                                                 => ( ~ ! [X7: $i] :
                                                          ( ( in @ X7 @ X6 )
                                                         => ( in @ X7 @ X4 ) )
                                                   => ( in @ X5 @ X6 ) ) ) ) ) )
                       => ( ! [X1: $i > $o] :
                              ( ~ ! [X2: $i] :
                                    ( ( X1 @ X2 )
                                   => ~ ! [X3: $i] :
                                          ( ( X1 @ X3 )
                                         => ( X2 = X3 ) ) )
                             => ( X1 @ ( descr @ X1 ) ) )
                         => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                                ( ( in @ X3 @ X1 )
                               => ( ( X2 @ X3 )
                                 => ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) ) ) )
                           => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                                  ( ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) )
                                 => ( in @ X3 @ X1 ) )
                             => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                                    ( ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) )
                                   => ( X2 @ X3 ) )
                               => ( ! [X1: $i > $o] :
                                      ( ~ ! [X2: $i] :
                                            ( ( X1 @ X2 )
                                           => ~ ! [X3: $i] :
                                                  ( ( X1 @ X3 )
                                                 => ( X2 = X3 ) ) )
                                     => ~ ! [X2: $i] :
                                            ( ( X1 @ X2 )
                                           => ~ ! [X3: $i] :
                                                  ( ( X1 @ X3 )
                                                 => ( X2 = X3 ) ) ) )
                                 => ( ! [X1: $o,X2: $i] :
                                        ( ( in @ X2 @ ( prop2set @ X1 ) )
                                       => X1 )
                                   => ( ! [X1: $i] :
                                          ( ( in @ X1 @ emptyset )
                                         => ! [X2: $o] : X2 )
                                     => ( ! [X1: $i] :
                                            ~ ( in @ X1 @ emptyset )
                                       => ( ! [X1: $i] :
                                              ~ ( in @ X1 @ emptyset )
                                         => ( ! [X1: $i > $o] :
                                                ( ~ ! [X2: $i] :
                                                      ( ( X1 @ X2 )
                                                     => ~ ! [X3: $i] :
                                                            ( ( X1 @ X3 )
                                                           => ( X2 = X3 ) ) )
                                               => ~ ! [X2: $i] :
                                                      ~ ( X1 @ X2 ) )
                                           => ( ! [X1: $i,X2: $i] :
                                                  ( ! [X3: $i] :
                                                      ( ( in @ X3 @ X1 )
                                                     => ( in @ X3 @ X2 ) )
                                                 => ( ! [X3: $i] :
                                                        ( ( in @ X3 @ X2 )
                                                       => ( in @ X3 @ X1 ) )
                                                   => ( X1 = X2 ) ) )
                                             => ( ! [X1: $i] :
                                                    ( ! [X2: $i] :
                                                        ~ ( in @ X2 @ X1 )
                                                   => ( X1 = emptyset ) )
                                               => ( ! [X1: $i] :
                                                      ( ! [X2: $i] :
                                                          ~ ( in @ X2 @ X1 )
                                                     => ( X1 = emptyset ) )
                                                 => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                                                        ( ( in @ X3 @ X1 )
                                                       => ( ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) )
                                                          = ( X2 @ X3 ) ) )
                                                   => ( ! [X1: $i] :
                                                          ( ( X1 != emptyset )
                                                         => ~ ! [X2: $i] :
                                                                ~ ( in @ X2 @ X1 ) )
                                                     => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                                                            ( ( in @ X3 @ X1 )
                                                           => ( ( X2 @ X3 )
                                                             => ( ( dsetconstr @ X1 @ X2 )
                                                               != emptyset ) ) )
                                                       => ( ! [X1: $i] :
                                                              ( ~ ! [X2: $i] :
                                                                    ~ ( in @ X2 @ X1 )
                                                             => ( X1 != emptyset ) )
                                                         => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ X2 ) )
                                                           => ( ( in @ emptyset @ ( setadjoin @ emptyset @ emptyset ) )
                                                             => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                    ( ( in @ X3 @ X2 )
                                                                   => ( in @ X3 @ ( setadjoin @ X1 @ X2 ) ) )
                                                               => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                      ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
                                                                     => ! [X4: $o] :
                                                                          ( ( ( X3 = X1 )
                                                                           => X4 )
                                                                         => ( ( ( in @ X3 @ X2 )
                                                                             => X4 )
                                                                           => X4 ) ) )
                                                                 => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                        ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
                                                                       => ( ( X3 != X1 )
                                                                         => ( in @ X3 @ X2 ) ) )
                                                                   => ( ! [X1: $i] :
                                                                          ( ( dsetconstr @ X1
                                                                            @ ^ [X2: $i] : ~ $false )
                                                                          = X1 )
                                                                     => ( ! [X1: $i,X2: $i] :
                                                                            ( ! [X3: $i] :
                                                                                ( ( in @ X3 @ X2 )
                                                                               => ( in @ X3 @ X1 ) )
                                                                           => ( in @ X2 @ ( powerset @ X1 ) ) )
                                                                       => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
                                                                         => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
                                                                           => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                                  ( ( in @ X2 @ ( powerset @ X1 ) )
                                                                                 => ( ( in @ X3 @ X2 )
                                                                                   => ( in @ X3 @ X1 ) ) )
                                                                             => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                                    ( ( in @ X2 @ X3 )
                                                                                   => ( ( in @ X3 @ X1 )
                                                                                     => ( in @ X2 @ ( setunion @ X1 ) ) ) )
                                                                               => ( ! [X1: $i,X2: $i] :
                                                                                      ( ( in @ X2 @ ( setunion @ X1 ) )
                                                                                     => ! [X3: $o] :
                                                                                          ( ! [X4: $i] :
                                                                                              ( ( in @ X2 @ X4 )
                                                                                             => ( ( in @ X4 @ X1 )
                                                                                               => X3 ) )
                                                                                         => X3 ) )
                                                                                 => ( ! [X1: $i,X2: $i] :
                                                                                        ( ( in @ X2 @ X1 )
                                                                                       => ( in @ X2 @ ( powerset @ ( setunion @ X1 ) ) ) )
                                                                                   => ( ! [X1: $i > $o] :
                                                                                          ( ~ ! [X2: $i] :
                                                                                                ( ( X1 @ X2 )
                                                                                               => ~ ! [X3: $i] :
                                                                                                      ( ( X1 @ X3 )
                                                                                                     => ( X2 = X3 ) ) )
                                                                                         => ~ ! [X2: $i] :
                                                                                                ~ ! [X3: $i] :
                                                                                                    ( ( X1 @ X3 )
                                                                                                    = ( X3 = X2 ) ) )
                                                                                     => ( ! [X1: $i] :
                                                                                            ( ( X1 != emptyset )
                                                                                           => ~ ! [X2: $i] :
                                                                                                  ~ ( in @ X2 @ X1 ) )
                                                                                       => ( ! [X1: $i,X2: $i] :
                                                                                              ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                                                                             => ( X1 = X2 ) )
                                                                                         => ( ! [X1: $i,X2: $i] :
                                                                                                ( ( X1 != X2 )
                                                                                               => ~ ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                                                                                           => ( ! [X1: $i,X2: $i] :
                                                                                                  ( ( X1 = X2 )
                                                                                                 => ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                                             => ( ! [X1: $i,X2: $i] :
                                                                                                    ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                                                                                   => ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                                                                                               => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                                                      ( ( in @ X3 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                                                     => ( ( X3 != X1 )
                                                                                                       => ( X3 = X2 ) ) )
                                                                                                 => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                                                   => ( ! [X1: $i,X2: $i] : ( in @ X2 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                                                     => ( ! [X1: $i,X2: $i > $o] :
                                                                                                            ( ~ ! [X3: $i] :
                                                                                                                  ( ( in @ X3 @ X1 )
                                                                                                                 => ~ ( X2 @ X3 ) )
                                                                                                           => ( ( dsetconstr @ X1 @ X2 )
                                                                                                             != emptyset ) )
                                                                                                       => ( ! [X1: $i > $o,X2: $i] :
                                                                                                              ( ( in @ X2 @ emptyset )
                                                                                                             => ( X1 @ X2 ) )
                                                                                                         => ( ! [X1: $i,X2: $i > $o] :
                                                                                                                ( ~ ! [X3: $i] :
                                                                                                                      ( ( in @ X3 @ X1 )
                                                                                                                     => ( X2 @ X3 ) )
                                                                                                               => ~ ! [X3: $i] :
                                                                                                                      ( ( in @ X3 @ X1 )
                                                                                                                     => ( X2 @ X3 ) ) )
                                                                                                           => ( ! [X1: $i,X2: $i > $o] :
                                                                                                                  ( ! [X3: $i] :
                                                                                                                      ( ( in @ X3 @ X1 )
                                                                                                                     => ~ ( X2 @ X3 ) )
                                                                                                                 => ! [X3: $i] :
                                                                                                                      ( ( in @ X3 @ X1 )
                                                                                                                     => ~ ( X2 @ X3 ) ) )
                                                                                                             => ( ! [X1: $i,X2: $i > $o] :
                                                                                                                    ( ! [X3: $i] :
                                                                                                                        ( ( in @ X3 @ X1 )
                                                                                                                       => ~ ( X2 @ X3 ) )
                                                                                                                   => ! [X3: $i] :
                                                                                                                        ( ( in @ X3 @ X1 )
                                                                                                                       => ~ ( X2 @ X3 ) ) )
                                                                                                               => ( ! [X1: $i,X2: $i > $o] :
                                                                                                                      ( ~ ! [X3: $i] :
                                                                                                                            ( ( in @ X3 @ X1 )
                                                                                                                           => ( X2 @ X3 ) )
                                                                                                                     => ~ ! [X3: $i] :
                                                                                                                            ( ( in @ X3 @ X1 )
                                                                                                                           => ( X2 @ X3 ) ) )
                                                                                                                 => ( ! [X1: $o] :
                                                                                                                        ( X1
                                                                                                                       => ( in @ emptyset @ ( prop2set @ X1 ) ) )
                                                                                                                   => ( ! [X1: $o] :
                                                                                                                          ( X1
                                                                                                                         => ( set2prop @ ( prop2set @ X1 ) ) )
                                                                                                                     => ( ! [X1: $i,X2: $i > $o] :
                                                                                                                            ( ! [X3: $i] :
                                                                                                                                ( ( in @ X3 @ X1 )
                                                                                                                               => ~ ( X2 @ X3 ) )
                                                                                                                           => ! [X3: $i] :
                                                                                                                                ( ( in @ X3 @ X1 )
                                                                                                                               => ~ ( X2 @ X3 ) ) )
                                                                                                                       => ( ! [X1: $i,X2: $i > $o] :
                                                                                                                              ( ~ ! [X3: $i] :
                                                                                                                                    ( ( in @ X3 @ X1 )
                                                                                                                                   => ( X2 @ X3 ) )
                                                                                                                             => ~ ! [X3: $i] :
                                                                                                                                    ( ( in @ X3 @ X1 )
                                                                                                                                   => ( X2 @ X3 ) ) )
                                                                                                                         => ( ! [X1: $i > $o] :
                                                                                                                                ( ~ ! [X2: $i] :
                                                                                                                                      ( ( X1 @ X2 )
                                                                                                                                     => ~ ! [X3: $i] :
                                                                                                                                            ( ( X1 @ X3 )
                                                                                                                                           => ( X2 = X3 ) ) )
                                                                                                                               => ~ ! [X2: $i] :
                                                                                                                                      ( ( X1 @ X2 )
                                                                                                                                     => ~ ! [X3: $i] :
                                                                                                                                            ( ( X1 @ X3 )
                                                                                                                                           => ( X2 = X3 ) ) ) )
                                                                                                                           => ( ! [X1: $i > $o] :
                                                                                                                                  ( ~ ! [X2: $i] :
                                                                                                                                        ~ ( X1 @ X2 )
                                                                                                                                 => ( ! [X2: $i,X3: $i] :
                                                                                                                                        ( ( X1 @ X2 )
                                                                                                                                       => ( ( X1 @ X3 )
                                                                                                                                         => ( X2 = X3 ) ) )
                                                                                                                                   => ~ ! [X2: $i] :
                                                                                                                                          ( ( X1 @ X2 )
                                                                                                                                         => ~ ! [X3: $i] :
                                                                                                                                                ( ( X1 @ X3 )
                                                                                                                                               => ( X2 = X3 ) ) ) ) )
                                                                                                                             => ! [X1: $i > $o] :
                                                                                                                                  ( ~ ! [X2: $i] :
                                                                                                                                        ~ ! [X3: $i] :
                                                                                                                                            ( ( X1 @ X3 )
                                                                                                                                            = ( X3 = X2 ) )
                                                                                                                                 => ~ ! [X2: $i] :
                                                                                                                                        ( ( X1 @ X2 )
                                                                                                                                       => ~ ! [X3: $i] :
                                                                                                                                              ( ( X1 @ X3 )
                                                                                                                                             => ( X2 = X3 ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ).

thf(h1,negated_conjecture,
    ~ ( ! [X1: $i,X2: $i] :
          ( ! [X3: $i] :
              ( ( in @ X3 @ X1 )
              = ( in @ X3 @ X2 ) )
         => ( X1 = X2 ) )
     => ( ! [X1: $i] :
            ~ ( in @ X1 @ emptyset )
       => ( ! [X1: $i,X2: $i,X3: $i] :
              ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
              = ( ( X3 != X1 )
               => ( in @ X3 @ X2 ) ) )
         => ( ! [X1: $i,X2: $i] :
                ( ( in @ X2 @ ( powerset @ X1 ) )
                = ( ! [X3: $i] :
                      ( ( in @ X3 @ X2 )
                     => ( in @ X3 @ X1 ) ) ) )
           => ( ! [X1: $i,X2: $i] :
                  ( ( in @ X2 @ ( setunion @ X1 ) )
                  = ( ~ ! [X3: $i] :
                          ( ( in @ X2 @ X3 )
                         => ~ ( in @ X3 @ X1 ) ) ) )
             => ( ( in @ emptyset @ omega )
               => ( ! [X1: $i] :
                      ( ( in @ X1 @ omega )
                     => ( in @ ( setadjoin @ X1 @ X1 ) @ omega ) )
                 => ( ! [X1: $i] :
                        ( ~ ( ( in @ emptyset @ X1 )
                           => ~ ! [X2: $i] :
                                  ( ~ ( ( in @ X2 @ omega )
                                     => ~ ( in @ X2 @ X1 ) )
                                 => ( in @ ( setadjoin @ X2 @ X2 ) @ X1 ) ) )
                       => ! [X2: $i] :
                            ( ( in @ X2 @ omega )
                           => ( in @ X2 @ X1 ) ) )
                   => ( ! [X1: $i > $i > $o,X2: $i] :
                          ( ! [X3: $i] :
                              ( ( in @ X3 @ X2 )
                             => ~ ! [X4: $i] :
                                    ( ( X1 @ X3 @ X4 )
                                   => ~ ! [X5: $i] :
                                          ( ( X1 @ X3 @ X5 )
                                         => ( X4 = X5 ) ) ) )
                         => ~ ! [X3: $i] :
                                ~ ! [X4: $i] :
                                    ( ( in @ X4 @ X3 )
                                    = ( ~ ! [X5: $i] :
                                            ( ( in @ X5 @ X2 )
                                           => ~ ( X1 @ X5 @ X4 ) ) ) ) )
                     => ( ! [X1: $i] :
                            ( ~ ! [X2: $i] :
                                  ~ ( in @ X2 @ X1 )
                           => ~ ! [X2: $i] :
                                  ( ( in @ X2 @ X1 )
                                 => ~ ! [X3: $i] :
                                        ( ( in @ X3 @ X2 )
                                       => ~ ( in @ X3 @ X1 ) ) ) )
                       => ( ! [X1: $i] :
                              ~ ! [X2: $i] :
                                  ( ~ ( ~ ( ! [X3: $i] :
                                              ( ( in @ X3 @ X2 )
                                             => ! [X4: $i] :
                                                  ( ( in @ X4 @ X3 )
                                                 => ( in @ X4 @ X1 ) ) )
                                         => ~ ! [X3: $i,X4: $i] :
                                                ( ~ ( ( in @ X3 @ X1 )
                                                   => ~ ( in @ X4 @ X1 ) )
                                               => ( ! [X5: $i] :
                                                      ( ( in @ X5 @ X2 )
                                                     => ( ( in @ X3 @ X5 )
                                                        = ( in @ X4 @ X5 ) ) )
                                                 => ( X3 = X4 ) ) ) )
                                     => ~ ! [X3: $i,X4: $i] :
                                            ( ~ ( ( in @ X3 @ X2 )
                                               => ~ ( in @ X4 @ X2 ) )
                                           => ( ~ ! [X5: $i] :
                                                    ( ( in @ X5 @ X3 )
                                                   => ( in @ X5 @ X4 ) )
                                             => ! [X5: $i] :
                                                  ( ( in @ X5 @ X4 )
                                                 => ( in @ X5 @ X3 ) ) ) ) )
                                 => ~ ! [X3: $i] :
                                        ( ~ ( ! [X4: $i] :
                                                ( ( in @ X4 @ X3 )
                                               => ( in @ X4 @ X1 ) )
                                           => ! [X4: $i] :
                                                ~ ( in @ X4 @ X3 ) )
                                       => ~ ! [X4: $i,X5: $i] :
                                              ( ~ ( ~ ( ( in @ X4 @ X2 )
                                                     => ~ ( in @ X5 @ X3 ) )
                                                 => ~ ! [X6: $i] :
                                                        ( ( in @ X6 @ X4 )
                                                       => ~ ( in @ X6 @ X3 ) ) )
                                             => ~ ! [X6: $i] :
                                                    ( ( in @ X6 @ X2 )
                                                   => ( ~ ! [X7: $i] :
                                                            ( ( in @ X7 @ X6 )
                                                           => ( in @ X7 @ X4 ) )
                                                     => ( in @ X5 @ X6 ) ) ) ) ) )
                         => ( ! [X1: $i > $o] :
                                ( ~ ! [X2: $i] :
                                      ( ( X1 @ X2 )
                                     => ~ ! [X3: $i] :
                                            ( ( X1 @ X3 )
                                           => ( X2 = X3 ) ) )
                               => ( X1 @ ( descr @ X1 ) ) )
                           => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                                  ( ( in @ X3 @ X1 )
                                 => ( ( X2 @ X3 )
                                   => ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) ) ) )
                             => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                                    ( ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) )
                                   => ( in @ X3 @ X1 ) )
                               => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                                      ( ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) )
                                     => ( X2 @ X3 ) )
                                 => ( ! [X1: $i > $o] :
                                        ( ~ ! [X2: $i] :
                                              ( ( X1 @ X2 )
                                             => ~ ! [X3: $i] :
                                                    ( ( X1 @ X3 )
                                                   => ( X2 = X3 ) ) )
                                       => ~ ! [X2: $i] :
                                              ( ( X1 @ X2 )
                                             => ~ ! [X3: $i] :
                                                    ( ( X1 @ X3 )
                                                   => ( X2 = X3 ) ) ) )
                                   => ( ! [X1: $o,X2: $i] :
                                          ( ( in @ X2 @ ( prop2set @ X1 ) )
                                         => X1 )
                                     => ( ! [X1: $i] :
                                            ( ( in @ X1 @ emptyset )
                                           => ! [X2: $o] : X2 )
                                       => ( ! [X1: $i] :
                                              ~ ( in @ X1 @ emptyset )
                                         => ( ! [X1: $i] :
                                                ~ ( in @ X1 @ emptyset )
                                           => ( ! [X1: $i > $o] :
                                                  ( ~ ! [X2: $i] :
                                                        ( ( X1 @ X2 )
                                                       => ~ ! [X3: $i] :
                                                              ( ( X1 @ X3 )
                                                             => ( X2 = X3 ) ) )
                                                 => ~ ! [X2: $i] :
                                                        ~ ( X1 @ X2 ) )
                                             => ( ! [X1: $i,X2: $i] :
                                                    ( ! [X3: $i] :
                                                        ( ( in @ X3 @ X1 )
                                                       => ( in @ X3 @ X2 ) )
                                                   => ( ! [X3: $i] :
                                                          ( ( in @ X3 @ X2 )
                                                         => ( in @ X3 @ X1 ) )
                                                     => ( X1 = X2 ) ) )
                                               => ( ! [X1: $i] :
                                                      ( ! [X2: $i] :
                                                          ~ ( in @ X2 @ X1 )
                                                     => ( X1 = emptyset ) )
                                                 => ( ! [X1: $i] :
                                                        ( ! [X2: $i] :
                                                            ~ ( in @ X2 @ X1 )
                                                       => ( X1 = emptyset ) )
                                                   => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                                                          ( ( in @ X3 @ X1 )
                                                         => ( ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) )
                                                            = ( X2 @ X3 ) ) )
                                                     => ( ! [X1: $i] :
                                                            ( ( X1 != emptyset )
                                                           => ~ ! [X2: $i] :
                                                                  ~ ( in @ X2 @ X1 ) )
                                                       => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                                                              ( ( in @ X3 @ X1 )
                                                             => ( ( X2 @ X3 )
                                                               => ( ( dsetconstr @ X1 @ X2 )
                                                                 != emptyset ) ) )
                                                         => ( ! [X1: $i] :
                                                                ( ~ ! [X2: $i] :
                                                                      ~ ( in @ X2 @ X1 )
                                                               => ( X1 != emptyset ) )
                                                           => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ X2 ) )
                                                             => ( ( in @ emptyset @ ( setadjoin @ emptyset @ emptyset ) )
                                                               => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                      ( ( in @ X3 @ X2 )
                                                                     => ( in @ X3 @ ( setadjoin @ X1 @ X2 ) ) )
                                                                 => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                        ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
                                                                       => ! [X4: $o] :
                                                                            ( ( ( X3 = X1 )
                                                                             => X4 )
                                                                           => ( ( ( in @ X3 @ X2 )
                                                                               => X4 )
                                                                             => X4 ) ) )
                                                                   => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                          ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
                                                                         => ( ( X3 != X1 )
                                                                           => ( in @ X3 @ X2 ) ) )
                                                                     => ( ! [X1: $i] :
                                                                            ( ( dsetconstr @ X1
                                                                              @ ^ [X2: $i] : ~ $false )
                                                                            = X1 )
                                                                       => ( ! [X1: $i,X2: $i] :
                                                                              ( ! [X3: $i] :
                                                                                  ( ( in @ X3 @ X2 )
                                                                                 => ( in @ X3 @ X1 ) )
                                                                             => ( in @ X2 @ ( powerset @ X1 ) ) )
                                                                         => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
                                                                           => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
                                                                             => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                                    ( ( in @ X2 @ ( powerset @ X1 ) )
                                                                                   => ( ( in @ X3 @ X2 )
                                                                                     => ( in @ X3 @ X1 ) ) )
                                                                               => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                                      ( ( in @ X2 @ X3 )
                                                                                     => ( ( in @ X3 @ X1 )
                                                                                       => ( in @ X2 @ ( setunion @ X1 ) ) ) )
                                                                                 => ( ! [X1: $i,X2: $i] :
                                                                                        ( ( in @ X2 @ ( setunion @ X1 ) )
                                                                                       => ! [X3: $o] :
                                                                                            ( ! [X4: $i] :
                                                                                                ( ( in @ X2 @ X4 )
                                                                                               => ( ( in @ X4 @ X1 )
                                                                                                 => X3 ) )
                                                                                           => X3 ) )
                                                                                   => ( ! [X1: $i,X2: $i] :
                                                                                          ( ( in @ X2 @ X1 )
                                                                                         => ( in @ X2 @ ( powerset @ ( setunion @ X1 ) ) ) )
                                                                                     => ( ! [X1: $i > $o] :
                                                                                            ( ~ ! [X2: $i] :
                                                                                                  ( ( X1 @ X2 )
                                                                                                 => ~ ! [X3: $i] :
                                                                                                        ( ( X1 @ X3 )
                                                                                                       => ( X2 = X3 ) ) )
                                                                                           => ~ ! [X2: $i] :
                                                                                                  ~ ! [X3: $i] :
                                                                                                      ( ( X1 @ X3 )
                                                                                                      = ( X3 = X2 ) ) )
                                                                                       => ( ! [X1: $i] :
                                                                                              ( ( X1 != emptyset )
                                                                                             => ~ ! [X2: $i] :
                                                                                                    ~ ( in @ X2 @ X1 ) )
                                                                                         => ( ! [X1: $i,X2: $i] :
                                                                                                ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                                                                               => ( X1 = X2 ) )
                                                                                           => ( ! [X1: $i,X2: $i] :
                                                                                                  ( ( X1 != X2 )
                                                                                                 => ~ ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                                                                                             => ( ! [X1: $i,X2: $i] :
                                                                                                    ( ( X1 = X2 )
                                                                                                   => ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                                               => ( ! [X1: $i,X2: $i] :
                                                                                                      ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                                                                                     => ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                                                                                                 => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                                                        ( ( in @ X3 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                                                       => ( ( X3 != X1 )
                                                                                                         => ( X3 = X2 ) ) )
                                                                                                   => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                                                     => ( ! [X1: $i,X2: $i] : ( in @ X2 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                                                       => ( ! [X1: $i,X2: $i > $o] :
                                                                                                              ( ~ ! [X3: $i] :
                                                                                                                    ( ( in @ X3 @ X1 )
                                                                                                                   => ~ ( X2 @ X3 ) )
                                                                                                             => ( ( dsetconstr @ X1 @ X2 )
                                                                                                               != emptyset ) )
                                                                                                         => ( ! [X1: $i > $o,X2: $i] :
                                                                                                                ( ( in @ X2 @ emptyset )
                                                                                                               => ( X1 @ X2 ) )
                                                                                                           => ( ! [X1: $i,X2: $i > $o] :
                                                                                                                  ( ~ ! [X3: $i] :
                                                                                                                        ( ( in @ X3 @ X1 )
                                                                                                                       => ( X2 @ X3 ) )
                                                                                                                 => ~ ! [X3: $i] :
                                                                                                                        ( ( in @ X3 @ X1 )
                                                                                                                       => ( X2 @ X3 ) ) )
                                                                                                             => ( ! [X1: $i,X2: $i > $o] :
                                                                                                                    ( ! [X3: $i] :
                                                                                                                        ( ( in @ X3 @ X1 )
                                                                                                                       => ~ ( X2 @ X3 ) )
                                                                                                                   => ! [X3: $i] :
                                                                                                                        ( ( in @ X3 @ X1 )
                                                                                                                       => ~ ( X2 @ X3 ) ) )
                                                                                                               => ( ! [X1: $i,X2: $i > $o] :
                                                                                                                      ( ! [X3: $i] :
                                                                                                                          ( ( in @ X3 @ X1 )
                                                                                                                         => ~ ( X2 @ X3 ) )
                                                                                                                     => ! [X3: $i] :
                                                                                                                          ( ( in @ X3 @ X1 )
                                                                                                                         => ~ ( X2 @ X3 ) ) )
                                                                                                                 => ( ! [X1: $i,X2: $i > $o] :
                                                                                                                        ( ~ ! [X3: $i] :
                                                                                                                              ( ( in @ X3 @ X1 )
                                                                                                                             => ( X2 @ X3 ) )
                                                                                                                       => ~ ! [X3: $i] :
                                                                                                                              ( ( in @ X3 @ X1 )
                                                                                                                             => ( X2 @ X3 ) ) )
                                                                                                                   => ( ! [X1: $o] :
                                                                                                                          ( X1
                                                                                                                         => ( in @ emptyset @ ( prop2set @ X1 ) ) )
                                                                                                                     => ( ! [X1: $o] :
                                                                                                                            ( X1
                                                                                                                           => ( set2prop @ ( prop2set @ X1 ) ) )
                                                                                                                       => ( ! [X1: $i,X2: $i > $o] :
                                                                                                                              ( ! [X3: $i] :
                                                                                                                                  ( ( in @ X3 @ X1 )
                                                                                                                                 => ~ ( X2 @ X3 ) )
                                                                                                                             => ! [X3: $i] :
                                                                                                                                  ( ( in @ X3 @ X1 )
                                                                                                                                 => ~ ( X2 @ X3 ) ) )
                                                                                                                         => ( ! [X1: $i,X2: $i > $o] :
                                                                                                                                ( ~ ! [X3: $i] :
                                                                                                                                      ( ( in @ X3 @ X1 )
                                                                                                                                     => ( X2 @ X3 ) )
                                                                                                                               => ~ ! [X3: $i] :
                                                                                                                                      ( ( in @ X3 @ X1 )
                                                                                                                                     => ( X2 @ X3 ) ) )
                                                                                                                           => ( ! [X1: $i > $o] :
                                                                                                                                  ( ~ ! [X2: $i] :
                                                                                                                                        ( ( X1 @ X2 )
                                                                                                                                       => ~ ! [X3: $i] :
                                                                                                                                              ( ( X1 @ X3 )
                                                                                                                                             => ( X2 = X3 ) ) )
                                                                                                                                 => ~ ! [X2: $i] :
                                                                                                                                        ( ( X1 @ X2 )
                                                                                                                                       => ~ ! [X3: $i] :
                                                                                                                                              ( ( X1 @ X3 )
                                                                                                                                             => ( X2 = X3 ) ) ) )
                                                                                                                             => ( ! [X1: $i > $o] :
                                                                                                                                    ( ~ ! [X2: $i] :
                                                                                                                                          ~ ( X1 @ X2 )
                                                                                                                                   => ( ! [X2: $i,X3: $i] :
                                                                                                                                          ( ( X1 @ X2 )
                                                                                                                                         => ( ( X1 @ X3 )
                                                                                                                                           => ( X2 = X3 ) ) )
                                                                                                                                     => ~ ! [X2: $i] :
                                                                                                                                            ( ( X1 @ X2 )
                                                                                                                                           => ~ ! [X3: $i] :
                                                                                                                                                  ( ( X1 @ X3 )
                                                                                                                                                 => ( X2 = X3 ) ) ) ) )
                                                                                                                               => ! [X1: $i > $o] :
                                                                                                                                    ( ~ ! [X2: $i] :
                                                                                                                                          ~ ! [X3: $i] :
                                                                                                                                              ( ( X1 @ X3 )
                                                                                                                                              = ( X3 = X2 ) )
                                                                                                                                   => ~ ! [X2: $i] :
                                                                                                                                          ( ( X1 @ X2 )
                                                                                                                                         => ~ ! [X3: $i] :
                                                                                                                                                ( ( X1 @ X3 )
                                                                                                                                               => ( X2 = X3 ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ),
    inference(assume_negation,[status(cth)],[exuI2]) ).

thf(h2,assumption,
    ! [X1: $i,X2: $i] :
      ( ! [X3: $i] :
          ( ( in @ X3 @ X1 )
          = ( in @ X3 @ X2 ) )
     => ( X1 = X2 ) ),
    introduced(assumption,[]) ).

thf(h3,assumption,
    ~ ( ! [X1: $i] :
          ~ ( in @ X1 @ emptyset )
     => ( ! [X1: $i,X2: $i,X3: $i] :
            ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
            = ( ( X3 != X1 )
             => ( in @ X3 @ X2 ) ) )
       => ( ! [X1: $i,X2: $i] :
              ( ( in @ X2 @ ( powerset @ X1 ) )
              = ( ! [X3: $i] :
                    ( ( in @ X3 @ X2 )
                   => ( in @ X3 @ X1 ) ) ) )
         => ( ! [X1: $i,X2: $i] :
                ( ( in @ X2 @ ( setunion @ X1 ) )
                = ( ~ ! [X3: $i] :
                        ( ( in @ X2 @ X3 )
                       => ~ ( in @ X3 @ X1 ) ) ) )
           => ( ( in @ emptyset @ omega )
             => ( ! [X1: $i] :
                    ( ( in @ X1 @ omega )
                   => ( in @ ( setadjoin @ X1 @ X1 ) @ omega ) )
               => ( ! [X1: $i] :
                      ( ~ ( ( in @ emptyset @ X1 )
                         => ~ ! [X2: $i] :
                                ( ~ ( ( in @ X2 @ omega )
                                   => ~ ( in @ X2 @ X1 ) )
                               => ( in @ ( setadjoin @ X2 @ X2 ) @ X1 ) ) )
                     => ! [X2: $i] :
                          ( ( in @ X2 @ omega )
                         => ( in @ X2 @ X1 ) ) )
                 => ( ! [X1: $i > $i > $o,X2: $i] :
                        ( ! [X3: $i] :
                            ( ( in @ X3 @ X2 )
                           => ~ ! [X4: $i] :
                                  ( ( X1 @ X3 @ X4 )
                                 => ~ ! [X5: $i] :
                                        ( ( X1 @ X3 @ X5 )
                                       => ( X4 = X5 ) ) ) )
                       => ~ ! [X3: $i] :
                              ~ ! [X4: $i] :
                                  ( ( in @ X4 @ X3 )
                                  = ( ~ ! [X5: $i] :
                                          ( ( in @ X5 @ X2 )
                                         => ~ ( X1 @ X5 @ X4 ) ) ) ) )
                   => ( ! [X1: $i] :
                          ( ~ ! [X2: $i] :
                                ~ ( in @ X2 @ X1 )
                         => ~ ! [X2: $i] :
                                ( ( in @ X2 @ X1 )
                               => ~ ! [X3: $i] :
                                      ( ( in @ X3 @ X2 )
                                     => ~ ( in @ X3 @ X1 ) ) ) )
                     => ( ! [X1: $i] :
                            ~ ! [X2: $i] :
                                ( ~ ( ~ ( ! [X3: $i] :
                                            ( ( in @ X3 @ X2 )
                                           => ! [X4: $i] :
                                                ( ( in @ X4 @ X3 )
                                               => ( in @ X4 @ X1 ) ) )
                                       => ~ ! [X3: $i,X4: $i] :
                                              ( ~ ( ( in @ X3 @ X1 )
                                                 => ~ ( in @ X4 @ X1 ) )
                                             => ( ! [X5: $i] :
                                                    ( ( in @ X5 @ X2 )
                                                   => ( ( in @ X3 @ X5 )
                                                      = ( in @ X4 @ X5 ) ) )
                                               => ( X3 = X4 ) ) ) )
                                   => ~ ! [X3: $i,X4: $i] :
                                          ( ~ ( ( in @ X3 @ X2 )
                                             => ~ ( in @ X4 @ X2 ) )
                                         => ( ~ ! [X5: $i] :
                                                  ( ( in @ X5 @ X3 )
                                                 => ( in @ X5 @ X4 ) )
                                           => ! [X5: $i] :
                                                ( ( in @ X5 @ X4 )
                                               => ( in @ X5 @ X3 ) ) ) ) )
                               => ~ ! [X3: $i] :
                                      ( ~ ( ! [X4: $i] :
                                              ( ( in @ X4 @ X3 )
                                             => ( in @ X4 @ X1 ) )
                                         => ! [X4: $i] :
                                              ~ ( in @ X4 @ X3 ) )
                                     => ~ ! [X4: $i,X5: $i] :
                                            ( ~ ( ~ ( ( in @ X4 @ X2 )
                                                   => ~ ( in @ X5 @ X3 ) )
                                               => ~ ! [X6: $i] :
                                                      ( ( in @ X6 @ X4 )
                                                     => ~ ( in @ X6 @ X3 ) ) )
                                           => ~ ! [X6: $i] :
                                                  ( ( in @ X6 @ X2 )
                                                 => ( ~ ! [X7: $i] :
                                                          ( ( in @ X7 @ X6 )
                                                         => ( in @ X7 @ X4 ) )
                                                   => ( in @ X5 @ X6 ) ) ) ) ) )
                       => ( ! [X1: $i > $o] :
                              ( ~ ! [X2: $i] :
                                    ( ( X1 @ X2 )
                                   => ~ ! [X3: $i] :
                                          ( ( X1 @ X3 )
                                         => ( X2 = X3 ) ) )
                             => ( X1 @ ( descr @ X1 ) ) )
                         => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                                ( ( in @ X3 @ X1 )
                               => ( ( X2 @ X3 )
                                 => ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) ) ) )
                           => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                                  ( ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) )
                                 => ( in @ X3 @ X1 ) )
                             => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                                    ( ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) )
                                   => ( X2 @ X3 ) )
                               => ( ! [X1: $i > $o] :
                                      ( ~ ! [X2: $i] :
                                            ( ( X1 @ X2 )
                                           => ~ ! [X3: $i] :
                                                  ( ( X1 @ X3 )
                                                 => ( X2 = X3 ) ) )
                                     => ~ ! [X2: $i] :
                                            ( ( X1 @ X2 )
                                           => ~ ! [X3: $i] :
                                                  ( ( X1 @ X3 )
                                                 => ( X2 = X3 ) ) ) )
                                 => ( ! [X1: $o,X2: $i] :
                                        ( ( in @ X2 @ ( prop2set @ X1 ) )
                                       => X1 )
                                   => ( ! [X1: $i] :
                                          ( ( in @ X1 @ emptyset )
                                         => ! [X2: $o] : X2 )
                                     => ( ! [X1: $i] :
                                            ~ ( in @ X1 @ emptyset )
                                       => ( ! [X1: $i] :
                                              ~ ( in @ X1 @ emptyset )
                                         => ( ! [X1: $i > $o] :
                                                ( ~ ! [X2: $i] :
                                                      ( ( X1 @ X2 )
                                                     => ~ ! [X3: $i] :
                                                            ( ( X1 @ X3 )
                                                           => ( X2 = X3 ) ) )
                                               => ~ ! [X2: $i] :
                                                      ~ ( X1 @ X2 ) )
                                           => ( ! [X1: $i,X2: $i] :
                                                  ( ! [X3: $i] :
                                                      ( ( in @ X3 @ X1 )
                                                     => ( in @ X3 @ X2 ) )
                                                 => ( ! [X3: $i] :
                                                        ( ( in @ X3 @ X2 )
                                                       => ( in @ X3 @ X1 ) )
                                                   => ( X1 = X2 ) ) )
                                             => ( ! [X1: $i] :
                                                    ( ! [X2: $i] :
                                                        ~ ( in @ X2 @ X1 )
                                                   => ( X1 = emptyset ) )
                                               => ( ! [X1: $i] :
                                                      ( ! [X2: $i] :
                                                          ~ ( in @ X2 @ X1 )
                                                     => ( X1 = emptyset ) )
                                                 => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                                                        ( ( in @ X3 @ X1 )
                                                       => ( ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) )
                                                          = ( X2 @ X3 ) ) )
                                                   => ( ! [X1: $i] :
                                                          ( ( X1 != emptyset )
                                                         => ~ ! [X2: $i] :
                                                                ~ ( in @ X2 @ X1 ) )
                                                     => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                                                            ( ( in @ X3 @ X1 )
                                                           => ( ( X2 @ X3 )
                                                             => ( ( dsetconstr @ X1 @ X2 )
                                                               != emptyset ) ) )
                                                       => ( ! [X1: $i] :
                                                              ( ~ ! [X2: $i] :
                                                                    ~ ( in @ X2 @ X1 )
                                                             => ( X1 != emptyset ) )
                                                         => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ X2 ) )
                                                           => ( ( in @ emptyset @ ( setadjoin @ emptyset @ emptyset ) )
                                                             => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                    ( ( in @ X3 @ X2 )
                                                                   => ( in @ X3 @ ( setadjoin @ X1 @ X2 ) ) )
                                                               => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                      ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
                                                                     => ! [X4: $o] :
                                                                          ( ( ( X3 = X1 )
                                                                           => X4 )
                                                                         => ( ( ( in @ X3 @ X2 )
                                                                             => X4 )
                                                                           => X4 ) ) )
                                                                 => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                        ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
                                                                       => ( ( X3 != X1 )
                                                                         => ( in @ X3 @ X2 ) ) )
                                                                   => ( ! [X1: $i] :
                                                                          ( ( dsetconstr @ X1
                                                                            @ ^ [X2: $i] : ~ $false )
                                                                          = X1 )
                                                                     => ( ! [X1: $i,X2: $i] :
                                                                            ( ! [X3: $i] :
                                                                                ( ( in @ X3 @ X2 )
                                                                               => ( in @ X3 @ X1 ) )
                                                                           => ( in @ X2 @ ( powerset @ X1 ) ) )
                                                                       => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
                                                                         => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
                                                                           => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                                  ( ( in @ X2 @ ( powerset @ X1 ) )
                                                                                 => ( ( in @ X3 @ X2 )
                                                                                   => ( in @ X3 @ X1 ) ) )
                                                                             => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                                    ( ( in @ X2 @ X3 )
                                                                                   => ( ( in @ X3 @ X1 )
                                                                                     => ( in @ X2 @ ( setunion @ X1 ) ) ) )
                                                                               => ( ! [X1: $i,X2: $i] :
                                                                                      ( ( in @ X2 @ ( setunion @ X1 ) )
                                                                                     => ! [X3: $o] :
                                                                                          ( ! [X4: $i] :
                                                                                              ( ( in @ X2 @ X4 )
                                                                                             => ( ( in @ X4 @ X1 )
                                                                                               => X3 ) )
                                                                                         => X3 ) )
                                                                                 => ( ! [X1: $i,X2: $i] :
                                                                                        ( ( in @ X2 @ X1 )
                                                                                       => ( in @ X2 @ ( powerset @ ( setunion @ X1 ) ) ) )
                                                                                   => ( ! [X1: $i > $o] :
                                                                                          ( ~ ! [X2: $i] :
                                                                                                ( ( X1 @ X2 )
                                                                                               => ~ ! [X3: $i] :
                                                                                                      ( ( X1 @ X3 )
                                                                                                     => ( X2 = X3 ) ) )
                                                                                         => ~ ! [X2: $i] :
                                                                                                ~ ! [X3: $i] :
                                                                                                    ( ( X1 @ X3 )
                                                                                                    = ( X3 = X2 ) ) )
                                                                                     => ( ! [X1: $i] :
                                                                                            ( ( X1 != emptyset )
                                                                                           => ~ ! [X2: $i] :
                                                                                                  ~ ( in @ X2 @ X1 ) )
                                                                                       => ( ! [X1: $i,X2: $i] :
                                                                                              ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                                                                             => ( X1 = X2 ) )
                                                                                         => ( ! [X1: $i,X2: $i] :
                                                                                                ( ( X1 != X2 )
                                                                                               => ~ ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                                                                                           => ( ! [X1: $i,X2: $i] :
                                                                                                  ( ( X1 = X2 )
                                                                                                 => ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                                             => ( ! [X1: $i,X2: $i] :
                                                                                                    ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                                                                                   => ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                                                                                               => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                                                      ( ( in @ X3 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                                                     => ( ( X3 != X1 )
                                                                                                       => ( X3 = X2 ) ) )
                                                                                                 => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                                                   => ( ! [X1: $i,X2: $i] : ( in @ X2 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                                                     => ( ! [X1: $i,X2: $i > $o] :
                                                                                                            ( ~ ! [X3: $i] :
                                                                                                                  ( ( in @ X3 @ X1 )
                                                                                                                 => ~ ( X2 @ X3 ) )
                                                                                                           => ( ( dsetconstr @ X1 @ X2 )
                                                                                                             != emptyset ) )
                                                                                                       => ( ! [X1: $i > $o,X2: $i] :
                                                                                                              ( ( in @ X2 @ emptyset )
                                                                                                             => ( X1 @ X2 ) )
                                                                                                         => ( ! [X1: $i,X2: $i > $o] :
                                                                                                                ( ~ ! [X3: $i] :
                                                                                                                      ( ( in @ X3 @ X1 )
                                                                                                                     => ( X2 @ X3 ) )
                                                                                                               => ~ ! [X3: $i] :
                                                                                                                      ( ( in @ X3 @ X1 )
                                                                                                                     => ( X2 @ X3 ) ) )
                                                                                                           => ( ! [X1: $i,X2: $i > $o] :
                                                                                                                  ( ! [X3: $i] :
                                                                                                                      ( ( in @ X3 @ X1 )
                                                                                                                     => ~ ( X2 @ X3 ) )
                                                                                                                 => ! [X3: $i] :
                                                                                                                      ( ( in @ X3 @ X1 )
                                                                                                                     => ~ ( X2 @ X3 ) ) )
                                                                                                             => ( ! [X1: $i,X2: $i > $o] :
                                                                                                                    ( ! [X3: $i] :
                                                                                                                        ( ( in @ X3 @ X1 )
                                                                                                                       => ~ ( X2 @ X3 ) )
                                                                                                                   => ! [X3: $i] :
                                                                                                                        ( ( in @ X3 @ X1 )
                                                                                                                       => ~ ( X2 @ X3 ) ) )
                                                                                                               => ( ! [X1: $i,X2: $i > $o] :
                                                                                                                      ( ~ ! [X3: $i] :
                                                                                                                            ( ( in @ X3 @ X1 )
                                                                                                                           => ( X2 @ X3 ) )
                                                                                                                     => ~ ! [X3: $i] :
                                                                                                                            ( ( in @ X3 @ X1 )
                                                                                                                           => ( X2 @ X3 ) ) )
                                                                                                                 => ( ! [X1: $o] :
                                                                                                                        ( X1
                                                                                                                       => ( in @ emptyset @ ( prop2set @ X1 ) ) )
                                                                                                                   => ( ! [X1: $o] :
                                                                                                                          ( X1
                                                                                                                         => ( set2prop @ ( prop2set @ X1 ) ) )
                                                                                                                     => ( ! [X1: $i,X2: $i > $o] :
                                                                                                                            ( ! [X3: $i] :
                                                                                                                                ( ( in @ X3 @ X1 )
                                                                                                                               => ~ ( X2 @ X3 ) )
                                                                                                                           => ! [X3: $i] :
                                                                                                                                ( ( in @ X3 @ X1 )
                                                                                                                               => ~ ( X2 @ X3 ) ) )
                                                                                                                       => ( ! [X1: $i,X2: $i > $o] :
                                                                                                                              ( ~ ! [X3: $i] :
                                                                                                                                    ( ( in @ X3 @ X1 )
                                                                                                                                   => ( X2 @ X3 ) )
                                                                                                                             => ~ ! [X3: $i] :
                                                                                                                                    ( ( in @ X3 @ X1 )
                                                                                                                                   => ( X2 @ X3 ) ) )
                                                                                                                         => ( ! [X1: $i > $o] :
                                                                                                                                ( ~ ! [X2: $i] :
                                                                                                                                      ( ( X1 @ X2 )
                                                                                                                                     => ~ ! [X3: $i] :
                                                                                                                                            ( ( X1 @ X3 )
                                                                                                                                           => ( X2 = X3 ) ) )
                                                                                                                               => ~ ! [X2: $i] :
                                                                                                                                      ( ( X1 @ X2 )
                                                                                                                                     => ~ ! [X3: $i] :
                                                                                                                                            ( ( X1 @ X3 )
                                                                                                                                           => ( X2 = X3 ) ) ) )
                                                                                                                           => ( ! [X1: $i > $o] :
                                                                                                                                  ( ~ ! [X2: $i] :
                                                                                                                                        ~ ( X1 @ X2 )
                                                                                                                                 => ( ! [X2: $i,X3: $i] :
                                                                                                                                        ( ( X1 @ X2 )
                                                                                                                                       => ( ( X1 @ X3 )
                                                                                                                                         => ( X2 = X3 ) ) )
                                                                                                                                   => ~ ! [X2: $i] :
                                                                                                                                          ( ( X1 @ X2 )
                                                                                                                                         => ~ ! [X3: $i] :
                                                                                                                                                ( ( X1 @ X3 )
                                                                                                                                               => ( X2 = X3 ) ) ) ) )
                                                                                                                             => ! [X1: $i > $o] :
                                                                                                                                  ( ~ ! [X2: $i] :
                                                                                                                                        ~ ! [X3: $i] :
                                                                                                                                            ( ( X1 @ X3 )
                                                                                                                                            = ( X3 = X2 ) )
                                                                                                                                 => ~ ! [X2: $i] :
                                                                                                                                        ( ( X1 @ X2 )
                                                                                                                                       => ~ ! [X3: $i] :
                                                                                                                                              ( ( X1 @ X3 )
                                                                                                                                             => ( X2 = X3 ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ),
    introduced(assumption,[]) ).

thf(h4,assumption,
    ! [X1: $i] :
      ~ ( in @ X1 @ emptyset ),
    introduced(assumption,[]) ).

thf(h5,assumption,
    ~ ( ! [X1: $i,X2: $i,X3: $i] :
          ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
          = ( ( X3 != X1 )
           => ( in @ X3 @ X2 ) ) )
     => ( ! [X1: $i,X2: $i] :
            ( ( in @ X2 @ ( powerset @ X1 ) )
            = ( ! [X3: $i] :
                  ( ( in @ X3 @ X2 )
                 => ( in @ X3 @ X1 ) ) ) )
       => ( ! [X1: $i,X2: $i] :
              ( ( in @ X2 @ ( setunion @ X1 ) )
              = ( ~ ! [X3: $i] :
                      ( ( in @ X2 @ X3 )
                     => ~ ( in @ X3 @ X1 ) ) ) )
         => ( ( in @ emptyset @ omega )
           => ( ! [X1: $i] :
                  ( ( in @ X1 @ omega )
                 => ( in @ ( setadjoin @ X1 @ X1 ) @ omega ) )
             => ( ! [X1: $i] :
                    ( ~ ( ( in @ emptyset @ X1 )
                       => ~ ! [X2: $i] :
                              ( ~ ( ( in @ X2 @ omega )
                                 => ~ ( in @ X2 @ X1 ) )
                             => ( in @ ( setadjoin @ X2 @ X2 ) @ X1 ) ) )
                   => ! [X2: $i] :
                        ( ( in @ X2 @ omega )
                       => ( in @ X2 @ X1 ) ) )
               => ( ! [X1: $i > $i > $o,X2: $i] :
                      ( ! [X3: $i] :
                          ( ( in @ X3 @ X2 )
                         => ~ ! [X4: $i] :
                                ( ( X1 @ X3 @ X4 )
                               => ~ ! [X5: $i] :
                                      ( ( X1 @ X3 @ X5 )
                                     => ( X4 = X5 ) ) ) )
                     => ~ ! [X3: $i] :
                            ~ ! [X4: $i] :
                                ( ( in @ X4 @ X3 )
                                = ( ~ ! [X5: $i] :
                                        ( ( in @ X5 @ X2 )
                                       => ~ ( X1 @ X5 @ X4 ) ) ) ) )
                 => ( ! [X1: $i] :
                        ( ~ ! [X2: $i] :
                              ~ ( in @ X2 @ X1 )
                       => ~ ! [X2: $i] :
                              ( ( in @ X2 @ X1 )
                             => ~ ! [X3: $i] :
                                    ( ( in @ X3 @ X2 )
                                   => ~ ( in @ X3 @ X1 ) ) ) )
                   => ( ! [X1: $i] :
                          ~ ! [X2: $i] :
                              ( ~ ( ~ ( ! [X3: $i] :
                                          ( ( in @ X3 @ X2 )
                                         => ! [X4: $i] :
                                              ( ( in @ X4 @ X3 )
                                             => ( in @ X4 @ X1 ) ) )
                                     => ~ ! [X3: $i,X4: $i] :
                                            ( ~ ( ( in @ X3 @ X1 )
                                               => ~ ( in @ X4 @ X1 ) )
                                           => ( ! [X5: $i] :
                                                  ( ( in @ X5 @ X2 )
                                                 => ( ( in @ X3 @ X5 )
                                                    = ( in @ X4 @ X5 ) ) )
                                             => ( X3 = X4 ) ) ) )
                                 => ~ ! [X3: $i,X4: $i] :
                                        ( ~ ( ( in @ X3 @ X2 )
                                           => ~ ( in @ X4 @ X2 ) )
                                       => ( ~ ! [X5: $i] :
                                                ( ( in @ X5 @ X3 )
                                               => ( in @ X5 @ X4 ) )
                                         => ! [X5: $i] :
                                              ( ( in @ X5 @ X4 )
                                             => ( in @ X5 @ X3 ) ) ) ) )
                             => ~ ! [X3: $i] :
                                    ( ~ ( ! [X4: $i] :
                                            ( ( in @ X4 @ X3 )
                                           => ( in @ X4 @ X1 ) )
                                       => ! [X4: $i] :
                                            ~ ( in @ X4 @ X3 ) )
                                   => ~ ! [X4: $i,X5: $i] :
                                          ( ~ ( ~ ( ( in @ X4 @ X2 )
                                                 => ~ ( in @ X5 @ X3 ) )
                                             => ~ ! [X6: $i] :
                                                    ( ( in @ X6 @ X4 )
                                                   => ~ ( in @ X6 @ X3 ) ) )
                                         => ~ ! [X6: $i] :
                                                ( ( in @ X6 @ X2 )
                                               => ( ~ ! [X7: $i] :
                                                        ( ( in @ X7 @ X6 )
                                                       => ( in @ X7 @ X4 ) )
                                                 => ( in @ X5 @ X6 ) ) ) ) ) )
                     => ( ! [X1: $i > $o] :
                            ( ~ ! [X2: $i] :
                                  ( ( X1 @ X2 )
                                 => ~ ! [X3: $i] :
                                        ( ( X1 @ X3 )
                                       => ( X2 = X3 ) ) )
                           => ( X1 @ ( descr @ X1 ) ) )
                       => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                              ( ( in @ X3 @ X1 )
                             => ( ( X2 @ X3 )
                               => ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) ) ) )
                         => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                                ( ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) )
                               => ( in @ X3 @ X1 ) )
                           => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                                  ( ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) )
                                 => ( X2 @ X3 ) )
                             => ( ! [X1: $i > $o] :
                                    ( ~ ! [X2: $i] :
                                          ( ( X1 @ X2 )
                                         => ~ ! [X3: $i] :
                                                ( ( X1 @ X3 )
                                               => ( X2 = X3 ) ) )
                                   => ~ ! [X2: $i] :
                                          ( ( X1 @ X2 )
                                         => ~ ! [X3: $i] :
                                                ( ( X1 @ X3 )
                                               => ( X2 = X3 ) ) ) )
                               => ( ! [X1: $o,X2: $i] :
                                      ( ( in @ X2 @ ( prop2set @ X1 ) )
                                     => X1 )
                                 => ( ! [X1: $i] :
                                        ( ( in @ X1 @ emptyset )
                                       => ! [X2: $o] : X2 )
                                   => ( ! [X1: $i] :
                                          ~ ( in @ X1 @ emptyset )
                                     => ( ! [X1: $i] :
                                            ~ ( in @ X1 @ emptyset )
                                       => ( ! [X1: $i > $o] :
                                              ( ~ ! [X2: $i] :
                                                    ( ( X1 @ X2 )
                                                   => ~ ! [X3: $i] :
                                                          ( ( X1 @ X3 )
                                                         => ( X2 = X3 ) ) )
                                             => ~ ! [X2: $i] :
                                                    ~ ( X1 @ X2 ) )
                                         => ( ! [X1: $i,X2: $i] :
                                                ( ! [X3: $i] :
                                                    ( ( in @ X3 @ X1 )
                                                   => ( in @ X3 @ X2 ) )
                                               => ( ! [X3: $i] :
                                                      ( ( in @ X3 @ X2 )
                                                     => ( in @ X3 @ X1 ) )
                                                 => ( X1 = X2 ) ) )
                                           => ( ! [X1: $i] :
                                                  ( ! [X2: $i] :
                                                      ~ ( in @ X2 @ X1 )
                                                 => ( X1 = emptyset ) )
                                             => ( ! [X1: $i] :
                                                    ( ! [X2: $i] :
                                                        ~ ( in @ X2 @ X1 )
                                                   => ( X1 = emptyset ) )
                                               => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                                                      ( ( in @ X3 @ X1 )
                                                     => ( ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) )
                                                        = ( X2 @ X3 ) ) )
                                                 => ( ! [X1: $i] :
                                                        ( ( X1 != emptyset )
                                                       => ~ ! [X2: $i] :
                                                              ~ ( in @ X2 @ X1 ) )
                                                   => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                                                          ( ( in @ X3 @ X1 )
                                                         => ( ( X2 @ X3 )
                                                           => ( ( dsetconstr @ X1 @ X2 )
                                                             != emptyset ) ) )
                                                     => ( ! [X1: $i] :
                                                            ( ~ ! [X2: $i] :
                                                                  ~ ( in @ X2 @ X1 )
                                                           => ( X1 != emptyset ) )
                                                       => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ X2 ) )
                                                         => ( ( in @ emptyset @ ( setadjoin @ emptyset @ emptyset ) )
                                                           => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                  ( ( in @ X3 @ X2 )
                                                                 => ( in @ X3 @ ( setadjoin @ X1 @ X2 ) ) )
                                                             => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                    ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
                                                                   => ! [X4: $o] :
                                                                        ( ( ( X3 = X1 )
                                                                         => X4 )
                                                                       => ( ( ( in @ X3 @ X2 )
                                                                           => X4 )
                                                                         => X4 ) ) )
                                                               => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                      ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
                                                                     => ( ( X3 != X1 )
                                                                       => ( in @ X3 @ X2 ) ) )
                                                                 => ( ! [X1: $i] :
                                                                        ( ( dsetconstr @ X1
                                                                          @ ^ [X2: $i] : ~ $false )
                                                                        = X1 )
                                                                   => ( ! [X1: $i,X2: $i] :
                                                                          ( ! [X3: $i] :
                                                                              ( ( in @ X3 @ X2 )
                                                                             => ( in @ X3 @ X1 ) )
                                                                         => ( in @ X2 @ ( powerset @ X1 ) ) )
                                                                     => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
                                                                       => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
                                                                         => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                                ( ( in @ X2 @ ( powerset @ X1 ) )
                                                                               => ( ( in @ X3 @ X2 )
                                                                                 => ( in @ X3 @ X1 ) ) )
                                                                           => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                                  ( ( in @ X2 @ X3 )
                                                                                 => ( ( in @ X3 @ X1 )
                                                                                   => ( in @ X2 @ ( setunion @ X1 ) ) ) )
                                                                             => ( ! [X1: $i,X2: $i] :
                                                                                    ( ( in @ X2 @ ( setunion @ X1 ) )
                                                                                   => ! [X3: $o] :
                                                                                        ( ! [X4: $i] :
                                                                                            ( ( in @ X2 @ X4 )
                                                                                           => ( ( in @ X4 @ X1 )
                                                                                             => X3 ) )
                                                                                       => X3 ) )
                                                                               => ( ! [X1: $i,X2: $i] :
                                                                                      ( ( in @ X2 @ X1 )
                                                                                     => ( in @ X2 @ ( powerset @ ( setunion @ X1 ) ) ) )
                                                                                 => ( ! [X1: $i > $o] :
                                                                                        ( ~ ! [X2: $i] :
                                                                                              ( ( X1 @ X2 )
                                                                                             => ~ ! [X3: $i] :
                                                                                                    ( ( X1 @ X3 )
                                                                                                   => ( X2 = X3 ) ) )
                                                                                       => ~ ! [X2: $i] :
                                                                                              ~ ! [X3: $i] :
                                                                                                  ( ( X1 @ X3 )
                                                                                                  = ( X3 = X2 ) ) )
                                                                                   => ( ! [X1: $i] :
                                                                                          ( ( X1 != emptyset )
                                                                                         => ~ ! [X2: $i] :
                                                                                                ~ ( in @ X2 @ X1 ) )
                                                                                     => ( ! [X1: $i,X2: $i] :
                                                                                            ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                                                                           => ( X1 = X2 ) )
                                                                                       => ( ! [X1: $i,X2: $i] :
                                                                                              ( ( X1 != X2 )
                                                                                             => ~ ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                                                                                         => ( ! [X1: $i,X2: $i] :
                                                                                                ( ( X1 = X2 )
                                                                                               => ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                                           => ( ! [X1: $i,X2: $i] :
                                                                                                  ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                                                                                 => ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                                                                                             => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                                                    ( ( in @ X3 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                                                   => ( ( X3 != X1 )
                                                                                                     => ( X3 = X2 ) ) )
                                                                                               => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                                                 => ( ! [X1: $i,X2: $i] : ( in @ X2 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                                                   => ( ! [X1: $i,X2: $i > $o] :
                                                                                                          ( ~ ! [X3: $i] :
                                                                                                                ( ( in @ X3 @ X1 )
                                                                                                               => ~ ( X2 @ X3 ) )
                                                                                                         => ( ( dsetconstr @ X1 @ X2 )
                                                                                                           != emptyset ) )
                                                                                                     => ( ! [X1: $i > $o,X2: $i] :
                                                                                                            ( ( in @ X2 @ emptyset )
                                                                                                           => ( X1 @ X2 ) )
                                                                                                       => ( ! [X1: $i,X2: $i > $o] :
                                                                                                              ( ~ ! [X3: $i] :
                                                                                                                    ( ( in @ X3 @ X1 )
                                                                                                                   => ( X2 @ X3 ) )
                                                                                                             => ~ ! [X3: $i] :
                                                                                                                    ( ( in @ X3 @ X1 )
                                                                                                                   => ( X2 @ X3 ) ) )
                                                                                                         => ( ! [X1: $i,X2: $i > $o] :
                                                                                                                ( ! [X3: $i] :
                                                                                                                    ( ( in @ X3 @ X1 )
                                                                                                                   => ~ ( X2 @ X3 ) )
                                                                                                               => ! [X3: $i] :
                                                                                                                    ( ( in @ X3 @ X1 )
                                                                                                                   => ~ ( X2 @ X3 ) ) )
                                                                                                           => ( ! [X1: $i,X2: $i > $o] :
                                                                                                                  ( ! [X3: $i] :
                                                                                                                      ( ( in @ X3 @ X1 )
                                                                                                                     => ~ ( X2 @ X3 ) )
                                                                                                                 => ! [X3: $i] :
                                                                                                                      ( ( in @ X3 @ X1 )
                                                                                                                     => ~ ( X2 @ X3 ) ) )
                                                                                                             => ( ! [X1: $i,X2: $i > $o] :
                                                                                                                    ( ~ ! [X3: $i] :
                                                                                                                          ( ( in @ X3 @ X1 )
                                                                                                                         => ( X2 @ X3 ) )
                                                                                                                   => ~ ! [X3: $i] :
                                                                                                                          ( ( in @ X3 @ X1 )
                                                                                                                         => ( X2 @ X3 ) ) )
                                                                                                               => ( ! [X1: $o] :
                                                                                                                      ( X1
                                                                                                                     => ( in @ emptyset @ ( prop2set @ X1 ) ) )
                                                                                                                 => ( ! [X1: $o] :
                                                                                                                        ( X1
                                                                                                                       => ( set2prop @ ( prop2set @ X1 ) ) )
                                                                                                                   => ( ! [X1: $i,X2: $i > $o] :
                                                                                                                          ( ! [X3: $i] :
                                                                                                                              ( ( in @ X3 @ X1 )
                                                                                                                             => ~ ( X2 @ X3 ) )
                                                                                                                         => ! [X3: $i] :
                                                                                                                              ( ( in @ X3 @ X1 )
                                                                                                                             => ~ ( X2 @ X3 ) ) )
                                                                                                                     => ( ! [X1: $i,X2: $i > $o] :
                                                                                                                            ( ~ ! [X3: $i] :
                                                                                                                                  ( ( in @ X3 @ X1 )
                                                                                                                                 => ( X2 @ X3 ) )
                                                                                                                           => ~ ! [X3: $i] :
                                                                                                                                  ( ( in @ X3 @ X1 )
                                                                                                                                 => ( X2 @ X3 ) ) )
                                                                                                                       => ( ! [X1: $i > $o] :
                                                                                                                              ( ~ ! [X2: $i] :
                                                                                                                                    ( ( X1 @ X2 )
                                                                                                                                   => ~ ! [X3: $i] :
                                                                                                                                          ( ( X1 @ X3 )
                                                                                                                                         => ( X2 = X3 ) ) )
                                                                                                                             => ~ ! [X2: $i] :
                                                                                                                                    ( ( X1 @ X2 )
                                                                                                                                   => ~ ! [X3: $i] :
                                                                                                                                          ( ( X1 @ X3 )
                                                                                                                                         => ( X2 = X3 ) ) ) )
                                                                                                                         => ( ! [X1: $i > $o] :
                                                                                                                                ( ~ ! [X2: $i] :
                                                                                                                                      ~ ( X1 @ X2 )
                                                                                                                               => ( ! [X2: $i,X3: $i] :
                                                                                                                                      ( ( X1 @ X2 )
                                                                                                                                     => ( ( X1 @ X3 )
                                                                                                                                       => ( X2 = X3 ) ) )
                                                                                                                                 => ~ ! [X2: $i] :
                                                                                                                                        ( ( X1 @ X2 )
                                                                                                                                       => ~ ! [X3: $i] :
                                                                                                                                              ( ( X1 @ X3 )
                                                                                                                                             => ( X2 = X3 ) ) ) ) )
                                                                                                                           => ! [X1: $i > $o] :
                                                                                                                                ( ~ ! [X2: $i] :
                                                                                                                                      ~ ! [X3: $i] :
                                                                                                                                          ( ( X1 @ X3 )
                                                                                                                                          = ( X3 = X2 ) )
                                                                                                                               => ~ ! [X2: $i] :
                                                                                                                                      ( ( X1 @ X2 )
                                                                                                                                     => ~ ! [X3: $i] :
                                                                                                                                            ( ( X1 @ X3 )
                                                                                                                                           => ( X2 = X3 ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ),
    introduced(assumption,[]) ).

thf(h6,assumption,
    ! [X1: $i,X2: $i,X3: $i] :
      ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
      = ( ( X3 != X1 )
       => ( in @ X3 @ X2 ) ) ),
    introduced(assumption,[]) ).

thf(h7,assumption,
    ~ ( ! [X1: $i,X2: $i] :
          ( ( in @ X2 @ ( powerset @ X1 ) )
          = ( ! [X3: $i] :
                ( ( in @ X3 @ X2 )
               => ( in @ X3 @ X1 ) ) ) )
     => ( ! [X1: $i,X2: $i] :
            ( ( in @ X2 @ ( setunion @ X1 ) )
            = ( ~ ! [X3: $i] :
                    ( ( in @ X2 @ X3 )
                   => ~ ( in @ X3 @ X1 ) ) ) )
       => ( ( in @ emptyset @ omega )
         => ( ! [X1: $i] :
                ( ( in @ X1 @ omega )
               => ( in @ ( setadjoin @ X1 @ X1 ) @ omega ) )
           => ( ! [X1: $i] :
                  ( ~ ( ( in @ emptyset @ X1 )
                     => ~ ! [X2: $i] :
                            ( ~ ( ( in @ X2 @ omega )
                               => ~ ( in @ X2 @ X1 ) )
                           => ( in @ ( setadjoin @ X2 @ X2 ) @ X1 ) ) )
                 => ! [X2: $i] :
                      ( ( in @ X2 @ omega )
                     => ( in @ X2 @ X1 ) ) )
             => ( ! [X1: $i > $i > $o,X2: $i] :
                    ( ! [X3: $i] :
                        ( ( in @ X3 @ X2 )
                       => ~ ! [X4: $i] :
                              ( ( X1 @ X3 @ X4 )
                             => ~ ! [X5: $i] :
                                    ( ( X1 @ X3 @ X5 )
                                   => ( X4 = X5 ) ) ) )
                   => ~ ! [X3: $i] :
                          ~ ! [X4: $i] :
                              ( ( in @ X4 @ X3 )
                              = ( ~ ! [X5: $i] :
                                      ( ( in @ X5 @ X2 )
                                     => ~ ( X1 @ X5 @ X4 ) ) ) ) )
               => ( ! [X1: $i] :
                      ( ~ ! [X2: $i] :
                            ~ ( in @ X2 @ X1 )
                     => ~ ! [X2: $i] :
                            ( ( in @ X2 @ X1 )
                           => ~ ! [X3: $i] :
                                  ( ( in @ X3 @ X2 )
                                 => ~ ( in @ X3 @ X1 ) ) ) )
                 => ( ! [X1: $i] :
                        ~ ! [X2: $i] :
                            ( ~ ( ~ ( ! [X3: $i] :
                                        ( ( in @ X3 @ X2 )
                                       => ! [X4: $i] :
                                            ( ( in @ X4 @ X3 )
                                           => ( in @ X4 @ X1 ) ) )
                                   => ~ ! [X3: $i,X4: $i] :
                                          ( ~ ( ( in @ X3 @ X1 )
                                             => ~ ( in @ X4 @ X1 ) )
                                         => ( ! [X5: $i] :
                                                ( ( in @ X5 @ X2 )
                                               => ( ( in @ X3 @ X5 )
                                                  = ( in @ X4 @ X5 ) ) )
                                           => ( X3 = X4 ) ) ) )
                               => ~ ! [X3: $i,X4: $i] :
                                      ( ~ ( ( in @ X3 @ X2 )
                                         => ~ ( in @ X4 @ X2 ) )
                                     => ( ~ ! [X5: $i] :
                                              ( ( in @ X5 @ X3 )
                                             => ( in @ X5 @ X4 ) )
                                       => ! [X5: $i] :
                                            ( ( in @ X5 @ X4 )
                                           => ( in @ X5 @ X3 ) ) ) ) )
                           => ~ ! [X3: $i] :
                                  ( ~ ( ! [X4: $i] :
                                          ( ( in @ X4 @ X3 )
                                         => ( in @ X4 @ X1 ) )
                                     => ! [X4: $i] :
                                          ~ ( in @ X4 @ X3 ) )
                                 => ~ ! [X4: $i,X5: $i] :
                                        ( ~ ( ~ ( ( in @ X4 @ X2 )
                                               => ~ ( in @ X5 @ X3 ) )
                                           => ~ ! [X6: $i] :
                                                  ( ( in @ X6 @ X4 )
                                                 => ~ ( in @ X6 @ X3 ) ) )
                                       => ~ ! [X6: $i] :
                                              ( ( in @ X6 @ X2 )
                                             => ( ~ ! [X7: $i] :
                                                      ( ( in @ X7 @ X6 )
                                                     => ( in @ X7 @ X4 ) )
                                               => ( in @ X5 @ X6 ) ) ) ) ) )
                   => ( ! [X1: $i > $o] :
                          ( ~ ! [X2: $i] :
                                ( ( X1 @ X2 )
                               => ~ ! [X3: $i] :
                                      ( ( X1 @ X3 )
                                     => ( X2 = X3 ) ) )
                         => ( X1 @ ( descr @ X1 ) ) )
                     => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                            ( ( in @ X3 @ X1 )
                           => ( ( X2 @ X3 )
                             => ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) ) ) )
                       => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                              ( ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) )
                             => ( in @ X3 @ X1 ) )
                         => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                                ( ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) )
                               => ( X2 @ X3 ) )
                           => ( ! [X1: $i > $o] :
                                  ( ~ ! [X2: $i] :
                                        ( ( X1 @ X2 )
                                       => ~ ! [X3: $i] :
                                              ( ( X1 @ X3 )
                                             => ( X2 = X3 ) ) )
                                 => ~ ! [X2: $i] :
                                        ( ( X1 @ X2 )
                                       => ~ ! [X3: $i] :
                                              ( ( X1 @ X3 )
                                             => ( X2 = X3 ) ) ) )
                             => ( ! [X1: $o,X2: $i] :
                                    ( ( in @ X2 @ ( prop2set @ X1 ) )
                                   => X1 )
                               => ( ! [X1: $i] :
                                      ( ( in @ X1 @ emptyset )
                                     => ! [X2: $o] : X2 )
                                 => ( ! [X1: $i] :
                                        ~ ( in @ X1 @ emptyset )
                                   => ( ! [X1: $i] :
                                          ~ ( in @ X1 @ emptyset )
                                     => ( ! [X1: $i > $o] :
                                            ( ~ ! [X2: $i] :
                                                  ( ( X1 @ X2 )
                                                 => ~ ! [X3: $i] :
                                                        ( ( X1 @ X3 )
                                                       => ( X2 = X3 ) ) )
                                           => ~ ! [X2: $i] :
                                                  ~ ( X1 @ X2 ) )
                                       => ( ! [X1: $i,X2: $i] :
                                              ( ! [X3: $i] :
                                                  ( ( in @ X3 @ X1 )
                                                 => ( in @ X3 @ X2 ) )
                                             => ( ! [X3: $i] :
                                                    ( ( in @ X3 @ X2 )
                                                   => ( in @ X3 @ X1 ) )
                                               => ( X1 = X2 ) ) )
                                         => ( ! [X1: $i] :
                                                ( ! [X2: $i] :
                                                    ~ ( in @ X2 @ X1 )
                                               => ( X1 = emptyset ) )
                                           => ( ! [X1: $i] :
                                                  ( ! [X2: $i] :
                                                      ~ ( in @ X2 @ X1 )
                                                 => ( X1 = emptyset ) )
                                             => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                                                    ( ( in @ X3 @ X1 )
                                                   => ( ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) )
                                                      = ( X2 @ X3 ) ) )
                                               => ( ! [X1: $i] :
                                                      ( ( X1 != emptyset )
                                                     => ~ ! [X2: $i] :
                                                            ~ ( in @ X2 @ X1 ) )
                                                 => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                                                        ( ( in @ X3 @ X1 )
                                                       => ( ( X2 @ X3 )
                                                         => ( ( dsetconstr @ X1 @ X2 )
                                                           != emptyset ) ) )
                                                   => ( ! [X1: $i] :
                                                          ( ~ ! [X2: $i] :
                                                                ~ ( in @ X2 @ X1 )
                                                         => ( X1 != emptyset ) )
                                                     => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ X2 ) )
                                                       => ( ( in @ emptyset @ ( setadjoin @ emptyset @ emptyset ) )
                                                         => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                ( ( in @ X3 @ X2 )
                                                               => ( in @ X3 @ ( setadjoin @ X1 @ X2 ) ) )
                                                           => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                  ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
                                                                 => ! [X4: $o] :
                                                                      ( ( ( X3 = X1 )
                                                                       => X4 )
                                                                     => ( ( ( in @ X3 @ X2 )
                                                                         => X4 )
                                                                       => X4 ) ) )
                                                             => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                    ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
                                                                   => ( ( X3 != X1 )
                                                                     => ( in @ X3 @ X2 ) ) )
                                                               => ( ! [X1: $i] :
                                                                      ( ( dsetconstr @ X1
                                                                        @ ^ [X2: $i] : ~ $false )
                                                                      = X1 )
                                                                 => ( ! [X1: $i,X2: $i] :
                                                                        ( ! [X3: $i] :
                                                                            ( ( in @ X3 @ X2 )
                                                                           => ( in @ X3 @ X1 ) )
                                                                       => ( in @ X2 @ ( powerset @ X1 ) ) )
                                                                   => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
                                                                     => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
                                                                       => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                              ( ( in @ X2 @ ( powerset @ X1 ) )
                                                                             => ( ( in @ X3 @ X2 )
                                                                               => ( in @ X3 @ X1 ) ) )
                                                                         => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                                ( ( in @ X2 @ X3 )
                                                                               => ( ( in @ X3 @ X1 )
                                                                                 => ( in @ X2 @ ( setunion @ X1 ) ) ) )
                                                                           => ( ! [X1: $i,X2: $i] :
                                                                                  ( ( in @ X2 @ ( setunion @ X1 ) )
                                                                                 => ! [X3: $o] :
                                                                                      ( ! [X4: $i] :
                                                                                          ( ( in @ X2 @ X4 )
                                                                                         => ( ( in @ X4 @ X1 )
                                                                                           => X3 ) )
                                                                                     => X3 ) )
                                                                             => ( ! [X1: $i,X2: $i] :
                                                                                    ( ( in @ X2 @ X1 )
                                                                                   => ( in @ X2 @ ( powerset @ ( setunion @ X1 ) ) ) )
                                                                               => ( ! [X1: $i > $o] :
                                                                                      ( ~ ! [X2: $i] :
                                                                                            ( ( X1 @ X2 )
                                                                                           => ~ ! [X3: $i] :
                                                                                                  ( ( X1 @ X3 )
                                                                                                 => ( X2 = X3 ) ) )
                                                                                     => ~ ! [X2: $i] :
                                                                                            ~ ! [X3: $i] :
                                                                                                ( ( X1 @ X3 )
                                                                                                = ( X3 = X2 ) ) )
                                                                                 => ( ! [X1: $i] :
                                                                                        ( ( X1 != emptyset )
                                                                                       => ~ ! [X2: $i] :
                                                                                              ~ ( in @ X2 @ X1 ) )
                                                                                   => ( ! [X1: $i,X2: $i] :
                                                                                          ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                                                                         => ( X1 = X2 ) )
                                                                                     => ( ! [X1: $i,X2: $i] :
                                                                                            ( ( X1 != X2 )
                                                                                           => ~ ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                                                                                       => ( ! [X1: $i,X2: $i] :
                                                                                              ( ( X1 = X2 )
                                                                                             => ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                                         => ( ! [X1: $i,X2: $i] :
                                                                                                ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                                                                               => ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                                                                                           => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                                                  ( ( in @ X3 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                                                 => ( ( X3 != X1 )
                                                                                                   => ( X3 = X2 ) ) )
                                                                                             => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                                               => ( ! [X1: $i,X2: $i] : ( in @ X2 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                                                 => ( ! [X1: $i,X2: $i > $o] :
                                                                                                        ( ~ ! [X3: $i] :
                                                                                                              ( ( in @ X3 @ X1 )
                                                                                                             => ~ ( X2 @ X3 ) )
                                                                                                       => ( ( dsetconstr @ X1 @ X2 )
                                                                                                         != emptyset ) )
                                                                                                   => ( ! [X1: $i > $o,X2: $i] :
                                                                                                          ( ( in @ X2 @ emptyset )
                                                                                                         => ( X1 @ X2 ) )
                                                                                                     => ( ! [X1: $i,X2: $i > $o] :
                                                                                                            ( ~ ! [X3: $i] :
                                                                                                                  ( ( in @ X3 @ X1 )
                                                                                                                 => ( X2 @ X3 ) )
                                                                                                           => ~ ! [X3: $i] :
                                                                                                                  ( ( in @ X3 @ X1 )
                                                                                                                 => ( X2 @ X3 ) ) )
                                                                                                       => ( ! [X1: $i,X2: $i > $o] :
                                                                                                              ( ! [X3: $i] :
                                                                                                                  ( ( in @ X3 @ X1 )
                                                                                                                 => ~ ( X2 @ X3 ) )
                                                                                                             => ! [X3: $i] :
                                                                                                                  ( ( in @ X3 @ X1 )
                                                                                                                 => ~ ( X2 @ X3 ) ) )
                                                                                                         => ( ! [X1: $i,X2: $i > $o] :
                                                                                                                ( ! [X3: $i] :
                                                                                                                    ( ( in @ X3 @ X1 )
                                                                                                                   => ~ ( X2 @ X3 ) )
                                                                                                               => ! [X3: $i] :
                                                                                                                    ( ( in @ X3 @ X1 )
                                                                                                                   => ~ ( X2 @ X3 ) ) )
                                                                                                           => ( ! [X1: $i,X2: $i > $o] :
                                                                                                                  ( ~ ! [X3: $i] :
                                                                                                                        ( ( in @ X3 @ X1 )
                                                                                                                       => ( X2 @ X3 ) )
                                                                                                                 => ~ ! [X3: $i] :
                                                                                                                        ( ( in @ X3 @ X1 )
                                                                                                                       => ( X2 @ X3 ) ) )
                                                                                                             => ( ! [X1: $o] :
                                                                                                                    ( X1
                                                                                                                   => ( in @ emptyset @ ( prop2set @ X1 ) ) )
                                                                                                               => ( ! [X1: $o] :
                                                                                                                      ( X1
                                                                                                                     => ( set2prop @ ( prop2set @ X1 ) ) )
                                                                                                                 => ( ! [X1: $i,X2: $i > $o] :
                                                                                                                        ( ! [X3: $i] :
                                                                                                                            ( ( in @ X3 @ X1 )
                                                                                                                           => ~ ( X2 @ X3 ) )
                                                                                                                       => ! [X3: $i] :
                                                                                                                            ( ( in @ X3 @ X1 )
                                                                                                                           => ~ ( X2 @ X3 ) ) )
                                                                                                                   => ( ! [X1: $i,X2: $i > $o] :
                                                                                                                          ( ~ ! [X3: $i] :
                                                                                                                                ( ( in @ X3 @ X1 )
                                                                                                                               => ( X2 @ X3 ) )
                                                                                                                         => ~ ! [X3: $i] :
                                                                                                                                ( ( in @ X3 @ X1 )
                                                                                                                               => ( X2 @ X3 ) ) )
                                                                                                                     => ( ! [X1: $i > $o] :
                                                                                                                            ( ~ ! [X2: $i] :
                                                                                                                                  ( ( X1 @ X2 )
                                                                                                                                 => ~ ! [X3: $i] :
                                                                                                                                        ( ( X1 @ X3 )
                                                                                                                                       => ( X2 = X3 ) ) )
                                                                                                                           => ~ ! [X2: $i] :
                                                                                                                                  ( ( X1 @ X2 )
                                                                                                                                 => ~ ! [X3: $i] :
                                                                                                                                        ( ( X1 @ X3 )
                                                                                                                                       => ( X2 = X3 ) ) ) )
                                                                                                                       => ( ! [X1: $i > $o] :
                                                                                                                              ( ~ ! [X2: $i] :
                                                                                                                                    ~ ( X1 @ X2 )
                                                                                                                             => ( ! [X2: $i,X3: $i] :
                                                                                                                                    ( ( X1 @ X2 )
                                                                                                                                   => ( ( X1 @ X3 )
                                                                                                                                     => ( X2 = X3 ) ) )
                                                                                                                               => ~ ! [X2: $i] :
                                                                                                                                      ( ( X1 @ X2 )
                                                                                                                                     => ~ ! [X3: $i] :
                                                                                                                                            ( ( X1 @ X3 )
                                                                                                                                           => ( X2 = X3 ) ) ) ) )
                                                                                                                         => ! [X1: $i > $o] :
                                                                                                                              ( ~ ! [X2: $i] :
                                                                                                                                    ~ ! [X3: $i] :
                                                                                                                                        ( ( X1 @ X3 )
                                                                                                                                        = ( X3 = X2 ) )
                                                                                                                             => ~ ! [X2: $i] :
                                                                                                                                    ( ( X1 @ X2 )
                                                                                                                                   => ~ ! [X3: $i] :
                                                                                                                                          ( ( X1 @ X3 )
                                                                                                                                         => ( X2 = X3 ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ),
    introduced(assumption,[]) ).

thf(h8,assumption,
    ! [X1: $i,X2: $i] :
      ( ( in @ X2 @ ( powerset @ X1 ) )
      = ( ! [X3: $i] :
            ( ( in @ X3 @ X2 )
           => ( in @ X3 @ X1 ) ) ) ),
    introduced(assumption,[]) ).

thf(h9,assumption,
    ~ ( ! [X1: $i,X2: $i] :
          ( ( in @ X2 @ ( setunion @ X1 ) )
          = ( ~ ! [X3: $i] :
                  ( ( in @ X2 @ X3 )
                 => ~ ( in @ X3 @ X1 ) ) ) )
     => ( ( in @ emptyset @ omega )
       => ( ! [X1: $i] :
              ( ( in @ X1 @ omega )
             => ( in @ ( setadjoin @ X1 @ X1 ) @ omega ) )
         => ( ! [X1: $i] :
                ( ~ ( ( in @ emptyset @ X1 )
                   => ~ ! [X2: $i] :
                          ( ~ ( ( in @ X2 @ omega )
                             => ~ ( in @ X2 @ X1 ) )
                         => ( in @ ( setadjoin @ X2 @ X2 ) @ X1 ) ) )
               => ! [X2: $i] :
                    ( ( in @ X2 @ omega )
                   => ( in @ X2 @ X1 ) ) )
           => ( ! [X1: $i > $i > $o,X2: $i] :
                  ( ! [X3: $i] :
                      ( ( in @ X3 @ X2 )
                     => ~ ! [X4: $i] :
                            ( ( X1 @ X3 @ X4 )
                           => ~ ! [X5: $i] :
                                  ( ( X1 @ X3 @ X5 )
                                 => ( X4 = X5 ) ) ) )
                 => ~ ! [X3: $i] :
                        ~ ! [X4: $i] :
                            ( ( in @ X4 @ X3 )
                            = ( ~ ! [X5: $i] :
                                    ( ( in @ X5 @ X2 )
                                   => ~ ( X1 @ X5 @ X4 ) ) ) ) )
             => ( ! [X1: $i] :
                    ( ~ ! [X2: $i] :
                          ~ ( in @ X2 @ X1 )
                   => ~ ! [X2: $i] :
                          ( ( in @ X2 @ X1 )
                         => ~ ! [X3: $i] :
                                ( ( in @ X3 @ X2 )
                               => ~ ( in @ X3 @ X1 ) ) ) )
               => ( ! [X1: $i] :
                      ~ ! [X2: $i] :
                          ( ~ ( ~ ( ! [X3: $i] :
                                      ( ( in @ X3 @ X2 )
                                     => ! [X4: $i] :
                                          ( ( in @ X4 @ X3 )
                                         => ( in @ X4 @ X1 ) ) )
                                 => ~ ! [X3: $i,X4: $i] :
                                        ( ~ ( ( in @ X3 @ X1 )
                                           => ~ ( in @ X4 @ X1 ) )
                                       => ( ! [X5: $i] :
                                              ( ( in @ X5 @ X2 )
                                             => ( ( in @ X3 @ X5 )
                                                = ( in @ X4 @ X5 ) ) )
                                         => ( X3 = X4 ) ) ) )
                             => ~ ! [X3: $i,X4: $i] :
                                    ( ~ ( ( in @ X3 @ X2 )
                                       => ~ ( in @ X4 @ X2 ) )
                                   => ( ~ ! [X5: $i] :
                                            ( ( in @ X5 @ X3 )
                                           => ( in @ X5 @ X4 ) )
                                     => ! [X5: $i] :
                                          ( ( in @ X5 @ X4 )
                                         => ( in @ X5 @ X3 ) ) ) ) )
                         => ~ ! [X3: $i] :
                                ( ~ ( ! [X4: $i] :
                                        ( ( in @ X4 @ X3 )
                                       => ( in @ X4 @ X1 ) )
                                   => ! [X4: $i] :
                                        ~ ( in @ X4 @ X3 ) )
                               => ~ ! [X4: $i,X5: $i] :
                                      ( ~ ( ~ ( ( in @ X4 @ X2 )
                                             => ~ ( in @ X5 @ X3 ) )
                                         => ~ ! [X6: $i] :
                                                ( ( in @ X6 @ X4 )
                                               => ~ ( in @ X6 @ X3 ) ) )
                                     => ~ ! [X6: $i] :
                                            ( ( in @ X6 @ X2 )
                                           => ( ~ ! [X7: $i] :
                                                    ( ( in @ X7 @ X6 )
                                                   => ( in @ X7 @ X4 ) )
                                             => ( in @ X5 @ X6 ) ) ) ) ) )
                 => ( ! [X1: $i > $o] :
                        ( ~ ! [X2: $i] :
                              ( ( X1 @ X2 )
                             => ~ ! [X3: $i] :
                                    ( ( X1 @ X3 )
                                   => ( X2 = X3 ) ) )
                       => ( X1 @ ( descr @ X1 ) ) )
                   => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                          ( ( in @ X3 @ X1 )
                         => ( ( X2 @ X3 )
                           => ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) ) ) )
                     => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                            ( ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) )
                           => ( in @ X3 @ X1 ) )
                       => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                              ( ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) )
                             => ( X2 @ X3 ) )
                         => ( ! [X1: $i > $o] :
                                ( ~ ! [X2: $i] :
                                      ( ( X1 @ X2 )
                                     => ~ ! [X3: $i] :
                                            ( ( X1 @ X3 )
                                           => ( X2 = X3 ) ) )
                               => ~ ! [X2: $i] :
                                      ( ( X1 @ X2 )
                                     => ~ ! [X3: $i] :
                                            ( ( X1 @ X3 )
                                           => ( X2 = X3 ) ) ) )
                           => ( ! [X1: $o,X2: $i] :
                                  ( ( in @ X2 @ ( prop2set @ X1 ) )
                                 => X1 )
                             => ( ! [X1: $i] :
                                    ( ( in @ X1 @ emptyset )
                                   => ! [X2: $o] : X2 )
                               => ( ! [X1: $i] :
                                      ~ ( in @ X1 @ emptyset )
                                 => ( ! [X1: $i] :
                                        ~ ( in @ X1 @ emptyset )
                                   => ( ! [X1: $i > $o] :
                                          ( ~ ! [X2: $i] :
                                                ( ( X1 @ X2 )
                                               => ~ ! [X3: $i] :
                                                      ( ( X1 @ X3 )
                                                     => ( X2 = X3 ) ) )
                                         => ~ ! [X2: $i] :
                                                ~ ( X1 @ X2 ) )
                                     => ( ! [X1: $i,X2: $i] :
                                            ( ! [X3: $i] :
                                                ( ( in @ X3 @ X1 )
                                               => ( in @ X3 @ X2 ) )
                                           => ( ! [X3: $i] :
                                                  ( ( in @ X3 @ X2 )
                                                 => ( in @ X3 @ X1 ) )
                                             => ( X1 = X2 ) ) )
                                       => ( ! [X1: $i] :
                                              ( ! [X2: $i] :
                                                  ~ ( in @ X2 @ X1 )
                                             => ( X1 = emptyset ) )
                                         => ( ! [X1: $i] :
                                                ( ! [X2: $i] :
                                                    ~ ( in @ X2 @ X1 )
                                               => ( X1 = emptyset ) )
                                           => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                                                  ( ( in @ X3 @ X1 )
                                                 => ( ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) )
                                                    = ( X2 @ X3 ) ) )
                                             => ( ! [X1: $i] :
                                                    ( ( X1 != emptyset )
                                                   => ~ ! [X2: $i] :
                                                          ~ ( in @ X2 @ X1 ) )
                                               => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                                                      ( ( in @ X3 @ X1 )
                                                     => ( ( X2 @ X3 )
                                                       => ( ( dsetconstr @ X1 @ X2 )
                                                         != emptyset ) ) )
                                                 => ( ! [X1: $i] :
                                                        ( ~ ! [X2: $i] :
                                                              ~ ( in @ X2 @ X1 )
                                                       => ( X1 != emptyset ) )
                                                   => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ X2 ) )
                                                     => ( ( in @ emptyset @ ( setadjoin @ emptyset @ emptyset ) )
                                                       => ( ! [X1: $i,X2: $i,X3: $i] :
                                                              ( ( in @ X3 @ X2 )
                                                             => ( in @ X3 @ ( setadjoin @ X1 @ X2 ) ) )
                                                         => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
                                                               => ! [X4: $o] :
                                                                    ( ( ( X3 = X1 )
                                                                     => X4 )
                                                                   => ( ( ( in @ X3 @ X2 )
                                                                       => X4 )
                                                                     => X4 ) ) )
                                                           => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                  ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
                                                                 => ( ( X3 != X1 )
                                                                   => ( in @ X3 @ X2 ) ) )
                                                             => ( ! [X1: $i] :
                                                                    ( ( dsetconstr @ X1
                                                                      @ ^ [X2: $i] : ~ $false )
                                                                    = X1 )
                                                               => ( ! [X1: $i,X2: $i] :
                                                                      ( ! [X3: $i] :
                                                                          ( ( in @ X3 @ X2 )
                                                                         => ( in @ X3 @ X1 ) )
                                                                     => ( in @ X2 @ ( powerset @ X1 ) ) )
                                                                 => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
                                                                   => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
                                                                     => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                            ( ( in @ X2 @ ( powerset @ X1 ) )
                                                                           => ( ( in @ X3 @ X2 )
                                                                             => ( in @ X3 @ X1 ) ) )
                                                                       => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                              ( ( in @ X2 @ X3 )
                                                                             => ( ( in @ X3 @ X1 )
                                                                               => ( in @ X2 @ ( setunion @ X1 ) ) ) )
                                                                         => ( ! [X1: $i,X2: $i] :
                                                                                ( ( in @ X2 @ ( setunion @ X1 ) )
                                                                               => ! [X3: $o] :
                                                                                    ( ! [X4: $i] :
                                                                                        ( ( in @ X2 @ X4 )
                                                                                       => ( ( in @ X4 @ X1 )
                                                                                         => X3 ) )
                                                                                   => X3 ) )
                                                                           => ( ! [X1: $i,X2: $i] :
                                                                                  ( ( in @ X2 @ X1 )
                                                                                 => ( in @ X2 @ ( powerset @ ( setunion @ X1 ) ) ) )
                                                                             => ( ! [X1: $i > $o] :
                                                                                    ( ~ ! [X2: $i] :
                                                                                          ( ( X1 @ X2 )
                                                                                         => ~ ! [X3: $i] :
                                                                                                ( ( X1 @ X3 )
                                                                                               => ( X2 = X3 ) ) )
                                                                                   => ~ ! [X2: $i] :
                                                                                          ~ ! [X3: $i] :
                                                                                              ( ( X1 @ X3 )
                                                                                              = ( X3 = X2 ) ) )
                                                                               => ( ! [X1: $i] :
                                                                                      ( ( X1 != emptyset )
                                                                                     => ~ ! [X2: $i] :
                                                                                            ~ ( in @ X2 @ X1 ) )
                                                                                 => ( ! [X1: $i,X2: $i] :
                                                                                        ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                                                                       => ( X1 = X2 ) )
                                                                                   => ( ! [X1: $i,X2: $i] :
                                                                                          ( ( X1 != X2 )
                                                                                         => ~ ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                                                                                     => ( ! [X1: $i,X2: $i] :
                                                                                            ( ( X1 = X2 )
                                                                                           => ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                                       => ( ! [X1: $i,X2: $i] :
                                                                                              ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                                                                             => ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                                                                                         => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                                                ( ( in @ X3 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                                               => ( ( X3 != X1 )
                                                                                                 => ( X3 = X2 ) ) )
                                                                                           => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                                             => ( ! [X1: $i,X2: $i] : ( in @ X2 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                                               => ( ! [X1: $i,X2: $i > $o] :
                                                                                                      ( ~ ! [X3: $i] :
                                                                                                            ( ( in @ X3 @ X1 )
                                                                                                           => ~ ( X2 @ X3 ) )
                                                                                                     => ( ( dsetconstr @ X1 @ X2 )
                                                                                                       != emptyset ) )
                                                                                                 => ( ! [X1: $i > $o,X2: $i] :
                                                                                                        ( ( in @ X2 @ emptyset )
                                                                                                       => ( X1 @ X2 ) )
                                                                                                   => ( ! [X1: $i,X2: $i > $o] :
                                                                                                          ( ~ ! [X3: $i] :
                                                                                                                ( ( in @ X3 @ X1 )
                                                                                                               => ( X2 @ X3 ) )
                                                                                                         => ~ ! [X3: $i] :
                                                                                                                ( ( in @ X3 @ X1 )
                                                                                                               => ( X2 @ X3 ) ) )
                                                                                                     => ( ! [X1: $i,X2: $i > $o] :
                                                                                                            ( ! [X3: $i] :
                                                                                                                ( ( in @ X3 @ X1 )
                                                                                                               => ~ ( X2 @ X3 ) )
                                                                                                           => ! [X3: $i] :
                                                                                                                ( ( in @ X3 @ X1 )
                                                                                                               => ~ ( X2 @ X3 ) ) )
                                                                                                       => ( ! [X1: $i,X2: $i > $o] :
                                                                                                              ( ! [X3: $i] :
                                                                                                                  ( ( in @ X3 @ X1 )
                                                                                                                 => ~ ( X2 @ X3 ) )
                                                                                                             => ! [X3: $i] :
                                                                                                                  ( ( in @ X3 @ X1 )
                                                                                                                 => ~ ( X2 @ X3 ) ) )
                                                                                                         => ( ! [X1: $i,X2: $i > $o] :
                                                                                                                ( ~ ! [X3: $i] :
                                                                                                                      ( ( in @ X3 @ X1 )
                                                                                                                     => ( X2 @ X3 ) )
                                                                                                               => ~ ! [X3: $i] :
                                                                                                                      ( ( in @ X3 @ X1 )
                                                                                                                     => ( X2 @ X3 ) ) )
                                                                                                           => ( ! [X1: $o] :
                                                                                                                  ( X1
                                                                                                                 => ( in @ emptyset @ ( prop2set @ X1 ) ) )
                                                                                                             => ( ! [X1: $o] :
                                                                                                                    ( X1
                                                                                                                   => ( set2prop @ ( prop2set @ X1 ) ) )
                                                                                                               => ( ! [X1: $i,X2: $i > $o] :
                                                                                                                      ( ! [X3: $i] :
                                                                                                                          ( ( in @ X3 @ X1 )
                                                                                                                         => ~ ( X2 @ X3 ) )
                                                                                                                     => ! [X3: $i] :
                                                                                                                          ( ( in @ X3 @ X1 )
                                                                                                                         => ~ ( X2 @ X3 ) ) )
                                                                                                                 => ( ! [X1: $i,X2: $i > $o] :
                                                                                                                        ( ~ ! [X3: $i] :
                                                                                                                              ( ( in @ X3 @ X1 )
                                                                                                                             => ( X2 @ X3 ) )
                                                                                                                       => ~ ! [X3: $i] :
                                                                                                                              ( ( in @ X3 @ X1 )
                                                                                                                             => ( X2 @ X3 ) ) )
                                                                                                                   => ( ! [X1: $i > $o] :
                                                                                                                          ( ~ ! [X2: $i] :
                                                                                                                                ( ( X1 @ X2 )
                                                                                                                               => ~ ! [X3: $i] :
                                                                                                                                      ( ( X1 @ X3 )
                                                                                                                                     => ( X2 = X3 ) ) )
                                                                                                                         => ~ ! [X2: $i] :
                                                                                                                                ( ( X1 @ X2 )
                                                                                                                               => ~ ! [X3: $i] :
                                                                                                                                      ( ( X1 @ X3 )
                                                                                                                                     => ( X2 = X3 ) ) ) )
                                                                                                                     => ( ! [X1: $i > $o] :
                                                                                                                            ( ~ ! [X2: $i] :
                                                                                                                                  ~ ( X1 @ X2 )
                                                                                                                           => ( ! [X2: $i,X3: $i] :
                                                                                                                                  ( ( X1 @ X2 )
                                                                                                                                 => ( ( X1 @ X3 )
                                                                                                                                   => ( X2 = X3 ) ) )
                                                                                                                             => ~ ! [X2: $i] :
                                                                                                                                    ( ( X1 @ X2 )
                                                                                                                                   => ~ ! [X3: $i] :
                                                                                                                                          ( ( X1 @ X3 )
                                                                                                                                         => ( X2 = X3 ) ) ) ) )
                                                                                                                       => ! [X1: $i > $o] :
                                                                                                                            ( ~ ! [X2: $i] :
                                                                                                                                  ~ ! [X3: $i] :
                                                                                                                                      ( ( X1 @ X3 )
                                                                                                                                      = ( X3 = X2 ) )
                                                                                                                           => ~ ! [X2: $i] :
                                                                                                                                  ( ( X1 @ X2 )
                                                                                                                                 => ~ ! [X3: $i] :
                                                                                                                                        ( ( X1 @ X3 )
                                                                                                                                       => ( X2 = X3 ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ),
    introduced(assumption,[]) ).

thf(h10,assumption,
    ! [X1: $i,X2: $i] :
      ( ( in @ X2 @ ( setunion @ X1 ) )
      = ( ~ ! [X3: $i] :
              ( ( in @ X2 @ X3 )
             => ~ ( in @ X3 @ X1 ) ) ) ),
    introduced(assumption,[]) ).

thf(h11,assumption,
    ~ ( ( in @ emptyset @ omega )
     => ( ! [X1: $i] :
            ( ( in @ X1 @ omega )
           => ( in @ ( setadjoin @ X1 @ X1 ) @ omega ) )
       => ( ! [X1: $i] :
              ( ~ ( ( in @ emptyset @ X1 )
                 => ~ ! [X2: $i] :
                        ( ~ ( ( in @ X2 @ omega )
                           => ~ ( in @ X2 @ X1 ) )
                       => ( in @ ( setadjoin @ X2 @ X2 ) @ X1 ) ) )
             => ! [X2: $i] :
                  ( ( in @ X2 @ omega )
                 => ( in @ X2 @ X1 ) ) )
         => ( ! [X1: $i > $i > $o,X2: $i] :
                ( ! [X3: $i] :
                    ( ( in @ X3 @ X2 )
                   => ~ ! [X4: $i] :
                          ( ( X1 @ X3 @ X4 )
                         => ~ ! [X5: $i] :
                                ( ( X1 @ X3 @ X5 )
                               => ( X4 = X5 ) ) ) )
               => ~ ! [X3: $i] :
                      ~ ! [X4: $i] :
                          ( ( in @ X4 @ X3 )
                          = ( ~ ! [X5: $i] :
                                  ( ( in @ X5 @ X2 )
                                 => ~ ( X1 @ X5 @ X4 ) ) ) ) )
           => ( ! [X1: $i] :
                  ( ~ ! [X2: $i] :
                        ~ ( in @ X2 @ X1 )
                 => ~ ! [X2: $i] :
                        ( ( in @ X2 @ X1 )
                       => ~ ! [X3: $i] :
                              ( ( in @ X3 @ X2 )
                             => ~ ( in @ X3 @ X1 ) ) ) )
             => ( ! [X1: $i] :
                    ~ ! [X2: $i] :
                        ( ~ ( ~ ( ! [X3: $i] :
                                    ( ( in @ X3 @ X2 )
                                   => ! [X4: $i] :
                                        ( ( in @ X4 @ X3 )
                                       => ( in @ X4 @ X1 ) ) )
                               => ~ ! [X3: $i,X4: $i] :
                                      ( ~ ( ( in @ X3 @ X1 )
                                         => ~ ( in @ X4 @ X1 ) )
                                     => ( ! [X5: $i] :
                                            ( ( in @ X5 @ X2 )
                                           => ( ( in @ X3 @ X5 )
                                              = ( in @ X4 @ X5 ) ) )
                                       => ( X3 = X4 ) ) ) )
                           => ~ ! [X3: $i,X4: $i] :
                                  ( ~ ( ( in @ X3 @ X2 )
                                     => ~ ( in @ X4 @ X2 ) )
                                 => ( ~ ! [X5: $i] :
                                          ( ( in @ X5 @ X3 )
                                         => ( in @ X5 @ X4 ) )
                                   => ! [X5: $i] :
                                        ( ( in @ X5 @ X4 )
                                       => ( in @ X5 @ X3 ) ) ) ) )
                       => ~ ! [X3: $i] :
                              ( ~ ( ! [X4: $i] :
                                      ( ( in @ X4 @ X3 )
                                     => ( in @ X4 @ X1 ) )
                                 => ! [X4: $i] :
                                      ~ ( in @ X4 @ X3 ) )
                             => ~ ! [X4: $i,X5: $i] :
                                    ( ~ ( ~ ( ( in @ X4 @ X2 )
                                           => ~ ( in @ X5 @ X3 ) )
                                       => ~ ! [X6: $i] :
                                              ( ( in @ X6 @ X4 )
                                             => ~ ( in @ X6 @ X3 ) ) )
                                   => ~ ! [X6: $i] :
                                          ( ( in @ X6 @ X2 )
                                         => ( ~ ! [X7: $i] :
                                                  ( ( in @ X7 @ X6 )
                                                 => ( in @ X7 @ X4 ) )
                                           => ( in @ X5 @ X6 ) ) ) ) ) )
               => ( ! [X1: $i > $o] :
                      ( ~ ! [X2: $i] :
                            ( ( X1 @ X2 )
                           => ~ ! [X3: $i] :
                                  ( ( X1 @ X3 )
                                 => ( X2 = X3 ) ) )
                     => ( X1 @ ( descr @ X1 ) ) )
                 => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                        ( ( in @ X3 @ X1 )
                       => ( ( X2 @ X3 )
                         => ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) ) ) )
                   => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                          ( ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) )
                         => ( in @ X3 @ X1 ) )
                     => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                            ( ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) )
                           => ( X2 @ X3 ) )
                       => ( ! [X1: $i > $o] :
                              ( ~ ! [X2: $i] :
                                    ( ( X1 @ X2 )
                                   => ~ ! [X3: $i] :
                                          ( ( X1 @ X3 )
                                         => ( X2 = X3 ) ) )
                             => ~ ! [X2: $i] :
                                    ( ( X1 @ X2 )
                                   => ~ ! [X3: $i] :
                                          ( ( X1 @ X3 )
                                         => ( X2 = X3 ) ) ) )
                         => ( ! [X1: $o,X2: $i] :
                                ( ( in @ X2 @ ( prop2set @ X1 ) )
                               => X1 )
                           => ( ! [X1: $i] :
                                  ( ( in @ X1 @ emptyset )
                                 => ! [X2: $o] : X2 )
                             => ( ! [X1: $i] :
                                    ~ ( in @ X1 @ emptyset )
                               => ( ! [X1: $i] :
                                      ~ ( in @ X1 @ emptyset )
                                 => ( ! [X1: $i > $o] :
                                        ( ~ ! [X2: $i] :
                                              ( ( X1 @ X2 )
                                             => ~ ! [X3: $i] :
                                                    ( ( X1 @ X3 )
                                                   => ( X2 = X3 ) ) )
                                       => ~ ! [X2: $i] :
                                              ~ ( X1 @ X2 ) )
                                   => ( ! [X1: $i,X2: $i] :
                                          ( ! [X3: $i] :
                                              ( ( in @ X3 @ X1 )
                                             => ( in @ X3 @ X2 ) )
                                         => ( ! [X3: $i] :
                                                ( ( in @ X3 @ X2 )
                                               => ( in @ X3 @ X1 ) )
                                           => ( X1 = X2 ) ) )
                                     => ( ! [X1: $i] :
                                            ( ! [X2: $i] :
                                                ~ ( in @ X2 @ X1 )
                                           => ( X1 = emptyset ) )
                                       => ( ! [X1: $i] :
                                              ( ! [X2: $i] :
                                                  ~ ( in @ X2 @ X1 )
                                             => ( X1 = emptyset ) )
                                         => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                                                ( ( in @ X3 @ X1 )
                                               => ( ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) )
                                                  = ( X2 @ X3 ) ) )
                                           => ( ! [X1: $i] :
                                                  ( ( X1 != emptyset )
                                                 => ~ ! [X2: $i] :
                                                        ~ ( in @ X2 @ X1 ) )
                                             => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                                                    ( ( in @ X3 @ X1 )
                                                   => ( ( X2 @ X3 )
                                                     => ( ( dsetconstr @ X1 @ X2 )
                                                       != emptyset ) ) )
                                               => ( ! [X1: $i] :
                                                      ( ~ ! [X2: $i] :
                                                            ~ ( in @ X2 @ X1 )
                                                     => ( X1 != emptyset ) )
                                                 => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ X2 ) )
                                                   => ( ( in @ emptyset @ ( setadjoin @ emptyset @ emptyset ) )
                                                     => ( ! [X1: $i,X2: $i,X3: $i] :
                                                            ( ( in @ X3 @ X2 )
                                                           => ( in @ X3 @ ( setadjoin @ X1 @ X2 ) ) )
                                                       => ( ! [X1: $i,X2: $i,X3: $i] :
                                                              ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
                                                             => ! [X4: $o] :
                                                                  ( ( ( X3 = X1 )
                                                                   => X4 )
                                                                 => ( ( ( in @ X3 @ X2 )
                                                                     => X4 )
                                                                   => X4 ) ) )
                                                         => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
                                                               => ( ( X3 != X1 )
                                                                 => ( in @ X3 @ X2 ) ) )
                                                           => ( ! [X1: $i] :
                                                                  ( ( dsetconstr @ X1
                                                                    @ ^ [X2: $i] : ~ $false )
                                                                  = X1 )
                                                             => ( ! [X1: $i,X2: $i] :
                                                                    ( ! [X3: $i] :
                                                                        ( ( in @ X3 @ X2 )
                                                                       => ( in @ X3 @ X1 ) )
                                                                   => ( in @ X2 @ ( powerset @ X1 ) ) )
                                                               => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
                                                                 => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
                                                                   => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                          ( ( in @ X2 @ ( powerset @ X1 ) )
                                                                         => ( ( in @ X3 @ X2 )
                                                                           => ( in @ X3 @ X1 ) ) )
                                                                     => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                            ( ( in @ X2 @ X3 )
                                                                           => ( ( in @ X3 @ X1 )
                                                                             => ( in @ X2 @ ( setunion @ X1 ) ) ) )
                                                                       => ( ! [X1: $i,X2: $i] :
                                                                              ( ( in @ X2 @ ( setunion @ X1 ) )
                                                                             => ! [X3: $o] :
                                                                                  ( ! [X4: $i] :
                                                                                      ( ( in @ X2 @ X4 )
                                                                                     => ( ( in @ X4 @ X1 )
                                                                                       => X3 ) )
                                                                                 => X3 ) )
                                                                         => ( ! [X1: $i,X2: $i] :
                                                                                ( ( in @ X2 @ X1 )
                                                                               => ( in @ X2 @ ( powerset @ ( setunion @ X1 ) ) ) )
                                                                           => ( ! [X1: $i > $o] :
                                                                                  ( ~ ! [X2: $i] :
                                                                                        ( ( X1 @ X2 )
                                                                                       => ~ ! [X3: $i] :
                                                                                              ( ( X1 @ X3 )
                                                                                             => ( X2 = X3 ) ) )
                                                                                 => ~ ! [X2: $i] :
                                                                                        ~ ! [X3: $i] :
                                                                                            ( ( X1 @ X3 )
                                                                                            = ( X3 = X2 ) ) )
                                                                             => ( ! [X1: $i] :
                                                                                    ( ( X1 != emptyset )
                                                                                   => ~ ! [X2: $i] :
                                                                                          ~ ( in @ X2 @ X1 ) )
                                                                               => ( ! [X1: $i,X2: $i] :
                                                                                      ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                                                                     => ( X1 = X2 ) )
                                                                                 => ( ! [X1: $i,X2: $i] :
                                                                                        ( ( X1 != X2 )
                                                                                       => ~ ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                                                                                   => ( ! [X1: $i,X2: $i] :
                                                                                          ( ( X1 = X2 )
                                                                                         => ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                                     => ( ! [X1: $i,X2: $i] :
                                                                                            ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                                                                           => ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                                                                                       => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                                              ( ( in @ X3 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                                             => ( ( X3 != X1 )
                                                                                               => ( X3 = X2 ) ) )
                                                                                         => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                                           => ( ! [X1: $i,X2: $i] : ( in @ X2 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                                             => ( ! [X1: $i,X2: $i > $o] :
                                                                                                    ( ~ ! [X3: $i] :
                                                                                                          ( ( in @ X3 @ X1 )
                                                                                                         => ~ ( X2 @ X3 ) )
                                                                                                   => ( ( dsetconstr @ X1 @ X2 )
                                                                                                     != emptyset ) )
                                                                                               => ( ! [X1: $i > $o,X2: $i] :
                                                                                                      ( ( in @ X2 @ emptyset )
                                                                                                     => ( X1 @ X2 ) )
                                                                                                 => ( ! [X1: $i,X2: $i > $o] :
                                                                                                        ( ~ ! [X3: $i] :
                                                                                                              ( ( in @ X3 @ X1 )
                                                                                                             => ( X2 @ X3 ) )
                                                                                                       => ~ ! [X3: $i] :
                                                                                                              ( ( in @ X3 @ X1 )
                                                                                                             => ( X2 @ X3 ) ) )
                                                                                                   => ( ! [X1: $i,X2: $i > $o] :
                                                                                                          ( ! [X3: $i] :
                                                                                                              ( ( in @ X3 @ X1 )
                                                                                                             => ~ ( X2 @ X3 ) )
                                                                                                         => ! [X3: $i] :
                                                                                                              ( ( in @ X3 @ X1 )
                                                                                                             => ~ ( X2 @ X3 ) ) )
                                                                                                     => ( ! [X1: $i,X2: $i > $o] :
                                                                                                            ( ! [X3: $i] :
                                                                                                                ( ( in @ X3 @ X1 )
                                                                                                               => ~ ( X2 @ X3 ) )
                                                                                                           => ! [X3: $i] :
                                                                                                                ( ( in @ X3 @ X1 )
                                                                                                               => ~ ( X2 @ X3 ) ) )
                                                                                                       => ( ! [X1: $i,X2: $i > $o] :
                                                                                                              ( ~ ! [X3: $i] :
                                                                                                                    ( ( in @ X3 @ X1 )
                                                                                                                   => ( X2 @ X3 ) )
                                                                                                             => ~ ! [X3: $i] :
                                                                                                                    ( ( in @ X3 @ X1 )
                                                                                                                   => ( X2 @ X3 ) ) )
                                                                                                         => ( ! [X1: $o] :
                                                                                                                ( X1
                                                                                                               => ( in @ emptyset @ ( prop2set @ X1 ) ) )
                                                                                                           => ( ! [X1: $o] :
                                                                                                                  ( X1
                                                                                                                 => ( set2prop @ ( prop2set @ X1 ) ) )
                                                                                                             => ( ! [X1: $i,X2: $i > $o] :
                                                                                                                    ( ! [X3: $i] :
                                                                                                                        ( ( in @ X3 @ X1 )
                                                                                                                       => ~ ( X2 @ X3 ) )
                                                                                                                   => ! [X3: $i] :
                                                                                                                        ( ( in @ X3 @ X1 )
                                                                                                                       => ~ ( X2 @ X3 ) ) )
                                                                                                               => ( ! [X1: $i,X2: $i > $o] :
                                                                                                                      ( ~ ! [X3: $i] :
                                                                                                                            ( ( in @ X3 @ X1 )
                                                                                                                           => ( X2 @ X3 ) )
                                                                                                                     => ~ ! [X3: $i] :
                                                                                                                            ( ( in @ X3 @ X1 )
                                                                                                                           => ( X2 @ X3 ) ) )
                                                                                                                 => ( ! [X1: $i > $o] :
                                                                                                                        ( ~ ! [X2: $i] :
                                                                                                                              ( ( X1 @ X2 )
                                                                                                                             => ~ ! [X3: $i] :
                                                                                                                                    ( ( X1 @ X3 )
                                                                                                                                   => ( X2 = X3 ) ) )
                                                                                                                       => ~ ! [X2: $i] :
                                                                                                                              ( ( X1 @ X2 )
                                                                                                                             => ~ ! [X3: $i] :
                                                                                                                                    ( ( X1 @ X3 )
                                                                                                                                   => ( X2 = X3 ) ) ) )
                                                                                                                   => ( ! [X1: $i > $o] :
                                                                                                                          ( ~ ! [X2: $i] :
                                                                                                                                ~ ( X1 @ X2 )
                                                                                                                         => ( ! [X2: $i,X3: $i] :
                                                                                                                                ( ( X1 @ X2 )
                                                                                                                               => ( ( X1 @ X3 )
                                                                                                                                 => ( X2 = X3 ) ) )
                                                                                                                           => ~ ! [X2: $i] :
                                                                                                                                  ( ( X1 @ X2 )
                                                                                                                                 => ~ ! [X3: $i] :
                                                                                                                                        ( ( X1 @ X3 )
                                                                                                                                       => ( X2 = X3 ) ) ) ) )
                                                                                                                     => ! [X1: $i > $o] :
                                                                                                                          ( ~ ! [X2: $i] :
                                                                                                                                ~ ! [X3: $i] :
                                                                                                                                    ( ( X1 @ X3 )
                                                                                                                                    = ( X3 = X2 ) )
                                                                                                                         => ~ ! [X2: $i] :
                                                                                                                                ( ( X1 @ X2 )
                                                                                                                               => ~ ! [X3: $i] :
                                                                                                                                      ( ( X1 @ X3 )
                                                                                                                                     => ( X2 = X3 ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ),
    introduced(assumption,[]) ).

thf(h12,assumption,
    in @ emptyset @ omega,
    introduced(assumption,[]) ).

thf(h13,assumption,
    ~ ( ! [X1: $i] :
          ( ( in @ X1 @ omega )
         => ( in @ ( setadjoin @ X1 @ X1 ) @ omega ) )
     => ( ! [X1: $i] :
            ( ~ ( ( in @ emptyset @ X1 )
               => ~ ! [X2: $i] :
                      ( ~ ( ( in @ X2 @ omega )
                         => ~ ( in @ X2 @ X1 ) )
                     => ( in @ ( setadjoin @ X2 @ X2 ) @ X1 ) ) )
           => ! [X2: $i] :
                ( ( in @ X2 @ omega )
               => ( in @ X2 @ X1 ) ) )
       => ( ! [X1: $i > $i > $o,X2: $i] :
              ( ! [X3: $i] :
                  ( ( in @ X3 @ X2 )
                 => ~ ! [X4: $i] :
                        ( ( X1 @ X3 @ X4 )
                       => ~ ! [X5: $i] :
                              ( ( X1 @ X3 @ X5 )
                             => ( X4 = X5 ) ) ) )
             => ~ ! [X3: $i] :
                    ~ ! [X4: $i] :
                        ( ( in @ X4 @ X3 )
                        = ( ~ ! [X5: $i] :
                                ( ( in @ X5 @ X2 )
                               => ~ ( X1 @ X5 @ X4 ) ) ) ) )
         => ( ! [X1: $i] :
                ( ~ ! [X2: $i] :
                      ~ ( in @ X2 @ X1 )
               => ~ ! [X2: $i] :
                      ( ( in @ X2 @ X1 )
                     => ~ ! [X3: $i] :
                            ( ( in @ X3 @ X2 )
                           => ~ ( in @ X3 @ X1 ) ) ) )
           => ( ! [X1: $i] :
                  ~ ! [X2: $i] :
                      ( ~ ( ~ ( ! [X3: $i] :
                                  ( ( in @ X3 @ X2 )
                                 => ! [X4: $i] :
                                      ( ( in @ X4 @ X3 )
                                     => ( in @ X4 @ X1 ) ) )
                             => ~ ! [X3: $i,X4: $i] :
                                    ( ~ ( ( in @ X3 @ X1 )
                                       => ~ ( in @ X4 @ X1 ) )
                                   => ( ! [X5: $i] :
                                          ( ( in @ X5 @ X2 )
                                         => ( ( in @ X3 @ X5 )
                                            = ( in @ X4 @ X5 ) ) )
                                     => ( X3 = X4 ) ) ) )
                         => ~ ! [X3: $i,X4: $i] :
                                ( ~ ( ( in @ X3 @ X2 )
                                   => ~ ( in @ X4 @ X2 ) )
                               => ( ~ ! [X5: $i] :
                                        ( ( in @ X5 @ X3 )
                                       => ( in @ X5 @ X4 ) )
                                 => ! [X5: $i] :
                                      ( ( in @ X5 @ X4 )
                                     => ( in @ X5 @ X3 ) ) ) ) )
                     => ~ ! [X3: $i] :
                            ( ~ ( ! [X4: $i] :
                                    ( ( in @ X4 @ X3 )
                                   => ( in @ X4 @ X1 ) )
                               => ! [X4: $i] :
                                    ~ ( in @ X4 @ X3 ) )
                           => ~ ! [X4: $i,X5: $i] :
                                  ( ~ ( ~ ( ( in @ X4 @ X2 )
                                         => ~ ( in @ X5 @ X3 ) )
                                     => ~ ! [X6: $i] :
                                            ( ( in @ X6 @ X4 )
                                           => ~ ( in @ X6 @ X3 ) ) )
                                 => ~ ! [X6: $i] :
                                        ( ( in @ X6 @ X2 )
                                       => ( ~ ! [X7: $i] :
                                                ( ( in @ X7 @ X6 )
                                               => ( in @ X7 @ X4 ) )
                                         => ( in @ X5 @ X6 ) ) ) ) ) )
             => ( ! [X1: $i > $o] :
                    ( ~ ! [X2: $i] :
                          ( ( X1 @ X2 )
                         => ~ ! [X3: $i] :
                                ( ( X1 @ X3 )
                               => ( X2 = X3 ) ) )
                   => ( X1 @ ( descr @ X1 ) ) )
               => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                      ( ( in @ X3 @ X1 )
                     => ( ( X2 @ X3 )
                       => ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) ) ) )
                 => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                        ( ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) )
                       => ( in @ X3 @ X1 ) )
                   => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                          ( ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) )
                         => ( X2 @ X3 ) )
                     => ( ! [X1: $i > $o] :
                            ( ~ ! [X2: $i] :
                                  ( ( X1 @ X2 )
                                 => ~ ! [X3: $i] :
                                        ( ( X1 @ X3 )
                                       => ( X2 = X3 ) ) )
                           => ~ ! [X2: $i] :
                                  ( ( X1 @ X2 )
                                 => ~ ! [X3: $i] :
                                        ( ( X1 @ X3 )
                                       => ( X2 = X3 ) ) ) )
                       => ( ! [X1: $o,X2: $i] :
                              ( ( in @ X2 @ ( prop2set @ X1 ) )
                             => X1 )
                         => ( ! [X1: $i] :
                                ( ( in @ X1 @ emptyset )
                               => ! [X2: $o] : X2 )
                           => ( ! [X1: $i] :
                                  ~ ( in @ X1 @ emptyset )
                             => ( ! [X1: $i] :
                                    ~ ( in @ X1 @ emptyset )
                               => ( ! [X1: $i > $o] :
                                      ( ~ ! [X2: $i] :
                                            ( ( X1 @ X2 )
                                           => ~ ! [X3: $i] :
                                                  ( ( X1 @ X3 )
                                                 => ( X2 = X3 ) ) )
                                     => ~ ! [X2: $i] :
                                            ~ ( X1 @ X2 ) )
                                 => ( ! [X1: $i,X2: $i] :
                                        ( ! [X3: $i] :
                                            ( ( in @ X3 @ X1 )
                                           => ( in @ X3 @ X2 ) )
                                       => ( ! [X3: $i] :
                                              ( ( in @ X3 @ X2 )
                                             => ( in @ X3 @ X1 ) )
                                         => ( X1 = X2 ) ) )
                                   => ( ! [X1: $i] :
                                          ( ! [X2: $i] :
                                              ~ ( in @ X2 @ X1 )
                                         => ( X1 = emptyset ) )
                                     => ( ! [X1: $i] :
                                            ( ! [X2: $i] :
                                                ~ ( in @ X2 @ X1 )
                                           => ( X1 = emptyset ) )
                                       => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                                              ( ( in @ X3 @ X1 )
                                             => ( ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) )
                                                = ( X2 @ X3 ) ) )
                                         => ( ! [X1: $i] :
                                                ( ( X1 != emptyset )
                                               => ~ ! [X2: $i] :
                                                      ~ ( in @ X2 @ X1 ) )
                                           => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                                                  ( ( in @ X3 @ X1 )
                                                 => ( ( X2 @ X3 )
                                                   => ( ( dsetconstr @ X1 @ X2 )
                                                     != emptyset ) ) )
                                             => ( ! [X1: $i] :
                                                    ( ~ ! [X2: $i] :
                                                          ~ ( in @ X2 @ X1 )
                                                   => ( X1 != emptyset ) )
                                               => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ X2 ) )
                                                 => ( ( in @ emptyset @ ( setadjoin @ emptyset @ emptyset ) )
                                                   => ( ! [X1: $i,X2: $i,X3: $i] :
                                                          ( ( in @ X3 @ X2 )
                                                         => ( in @ X3 @ ( setadjoin @ X1 @ X2 ) ) )
                                                     => ( ! [X1: $i,X2: $i,X3: $i] :
                                                            ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
                                                           => ! [X4: $o] :
                                                                ( ( ( X3 = X1 )
                                                                 => X4 )
                                                               => ( ( ( in @ X3 @ X2 )
                                                                   => X4 )
                                                                 => X4 ) ) )
                                                       => ( ! [X1: $i,X2: $i,X3: $i] :
                                                              ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
                                                             => ( ( X3 != X1 )
                                                               => ( in @ X3 @ X2 ) ) )
                                                         => ( ! [X1: $i] :
                                                                ( ( dsetconstr @ X1
                                                                  @ ^ [X2: $i] : ~ $false )
                                                                = X1 )
                                                           => ( ! [X1: $i,X2: $i] :
                                                                  ( ! [X3: $i] :
                                                                      ( ( in @ X3 @ X2 )
                                                                     => ( in @ X3 @ X1 ) )
                                                                 => ( in @ X2 @ ( powerset @ X1 ) ) )
                                                             => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
                                                               => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
                                                                 => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                        ( ( in @ X2 @ ( powerset @ X1 ) )
                                                                       => ( ( in @ X3 @ X2 )
                                                                         => ( in @ X3 @ X1 ) ) )
                                                                   => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                          ( ( in @ X2 @ X3 )
                                                                         => ( ( in @ X3 @ X1 )
                                                                           => ( in @ X2 @ ( setunion @ X1 ) ) ) )
                                                                     => ( ! [X1: $i,X2: $i] :
                                                                            ( ( in @ X2 @ ( setunion @ X1 ) )
                                                                           => ! [X3: $o] :
                                                                                ( ! [X4: $i] :
                                                                                    ( ( in @ X2 @ X4 )
                                                                                   => ( ( in @ X4 @ X1 )
                                                                                     => X3 ) )
                                                                               => X3 ) )
                                                                       => ( ! [X1: $i,X2: $i] :
                                                                              ( ( in @ X2 @ X1 )
                                                                             => ( in @ X2 @ ( powerset @ ( setunion @ X1 ) ) ) )
                                                                         => ( ! [X1: $i > $o] :
                                                                                ( ~ ! [X2: $i] :
                                                                                      ( ( X1 @ X2 )
                                                                                     => ~ ! [X3: $i] :
                                                                                            ( ( X1 @ X3 )
                                                                                           => ( X2 = X3 ) ) )
                                                                               => ~ ! [X2: $i] :
                                                                                      ~ ! [X3: $i] :
                                                                                          ( ( X1 @ X3 )
                                                                                          = ( X3 = X2 ) ) )
                                                                           => ( ! [X1: $i] :
                                                                                  ( ( X1 != emptyset )
                                                                                 => ~ ! [X2: $i] :
                                                                                        ~ ( in @ X2 @ X1 ) )
                                                                             => ( ! [X1: $i,X2: $i] :
                                                                                    ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                                                                   => ( X1 = X2 ) )
                                                                               => ( ! [X1: $i,X2: $i] :
                                                                                      ( ( X1 != X2 )
                                                                                     => ~ ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                                                                                 => ( ! [X1: $i,X2: $i] :
                                                                                        ( ( X1 = X2 )
                                                                                       => ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                                   => ( ! [X1: $i,X2: $i] :
                                                                                          ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                                                                         => ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                                                                                     => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                                            ( ( in @ X3 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                                           => ( ( X3 != X1 )
                                                                                             => ( X3 = X2 ) ) )
                                                                                       => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                                         => ( ! [X1: $i,X2: $i] : ( in @ X2 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                                           => ( ! [X1: $i,X2: $i > $o] :
                                                                                                  ( ~ ! [X3: $i] :
                                                                                                        ( ( in @ X3 @ X1 )
                                                                                                       => ~ ( X2 @ X3 ) )
                                                                                                 => ( ( dsetconstr @ X1 @ X2 )
                                                                                                   != emptyset ) )
                                                                                             => ( ! [X1: $i > $o,X2: $i] :
                                                                                                    ( ( in @ X2 @ emptyset )
                                                                                                   => ( X1 @ X2 ) )
                                                                                               => ( ! [X1: $i,X2: $i > $o] :
                                                                                                      ( ~ ! [X3: $i] :
                                                                                                            ( ( in @ X3 @ X1 )
                                                                                                           => ( X2 @ X3 ) )
                                                                                                     => ~ ! [X3: $i] :
                                                                                                            ( ( in @ X3 @ X1 )
                                                                                                           => ( X2 @ X3 ) ) )
                                                                                                 => ( ! [X1: $i,X2: $i > $o] :
                                                                                                        ( ! [X3: $i] :
                                                                                                            ( ( in @ X3 @ X1 )
                                                                                                           => ~ ( X2 @ X3 ) )
                                                                                                       => ! [X3: $i] :
                                                                                                            ( ( in @ X3 @ X1 )
                                                                                                           => ~ ( X2 @ X3 ) ) )
                                                                                                   => ( ! [X1: $i,X2: $i > $o] :
                                                                                                          ( ! [X3: $i] :
                                                                                                              ( ( in @ X3 @ X1 )
                                                                                                             => ~ ( X2 @ X3 ) )
                                                                                                         => ! [X3: $i] :
                                                                                                              ( ( in @ X3 @ X1 )
                                                                                                             => ~ ( X2 @ X3 ) ) )
                                                                                                     => ( ! [X1: $i,X2: $i > $o] :
                                                                                                            ( ~ ! [X3: $i] :
                                                                                                                  ( ( in @ X3 @ X1 )
                                                                                                                 => ( X2 @ X3 ) )
                                                                                                           => ~ ! [X3: $i] :
                                                                                                                  ( ( in @ X3 @ X1 )
                                                                                                                 => ( X2 @ X3 ) ) )
                                                                                                       => ( ! [X1: $o] :
                                                                                                              ( X1
                                                                                                             => ( in @ emptyset @ ( prop2set @ X1 ) ) )
                                                                                                         => ( ! [X1: $o] :
                                                                                                                ( X1
                                                                                                               => ( set2prop @ ( prop2set @ X1 ) ) )
                                                                                                           => ( ! [X1: $i,X2: $i > $o] :
                                                                                                                  ( ! [X3: $i] :
                                                                                                                      ( ( in @ X3 @ X1 )
                                                                                                                     => ~ ( X2 @ X3 ) )
                                                                                                                 => ! [X3: $i] :
                                                                                                                      ( ( in @ X3 @ X1 )
                                                                                                                     => ~ ( X2 @ X3 ) ) )
                                                                                                             => ( ! [X1: $i,X2: $i > $o] :
                                                                                                                    ( ~ ! [X3: $i] :
                                                                                                                          ( ( in @ X3 @ X1 )
                                                                                                                         => ( X2 @ X3 ) )
                                                                                                                   => ~ ! [X3: $i] :
                                                                                                                          ( ( in @ X3 @ X1 )
                                                                                                                         => ( X2 @ X3 ) ) )
                                                                                                               => ( ! [X1: $i > $o] :
                                                                                                                      ( ~ ! [X2: $i] :
                                                                                                                            ( ( X1 @ X2 )
                                                                                                                           => ~ ! [X3: $i] :
                                                                                                                                  ( ( X1 @ X3 )
                                                                                                                                 => ( X2 = X3 ) ) )
                                                                                                                     => ~ ! [X2: $i] :
                                                                                                                            ( ( X1 @ X2 )
                                                                                                                           => ~ ! [X3: $i] :
                                                                                                                                  ( ( X1 @ X3 )
                                                                                                                                 => ( X2 = X3 ) ) ) )
                                                                                                                 => ( ! [X1: $i > $o] :
                                                                                                                        ( ~ ! [X2: $i] :
                                                                                                                              ~ ( X1 @ X2 )
                                                                                                                       => ( ! [X2: $i,X3: $i] :
                                                                                                                              ( ( X1 @ X2 )
                                                                                                                             => ( ( X1 @ X3 )
                                                                                                                               => ( X2 = X3 ) ) )
                                                                                                                         => ~ ! [X2: $i] :
                                                                                                                                ( ( X1 @ X2 )
                                                                                                                               => ~ ! [X3: $i] :
                                                                                                                                      ( ( X1 @ X3 )
                                                                                                                                     => ( X2 = X3 ) ) ) ) )
                                                                                                                   => ! [X1: $i > $o] :
                                                                                                                        ( ~ ! [X2: $i] :
                                                                                                                              ~ ! [X3: $i] :
                                                                                                                                  ( ( X1 @ X3 )
                                                                                                                                  = ( X3 = X2 ) )
                                                                                                                       => ~ ! [X2: $i] :
                                                                                                                              ( ( X1 @ X2 )
                                                                                                                             => ~ ! [X3: $i] :
                                                                                                                                    ( ( X1 @ X3 )
                                                                                                                                   => ( X2 = X3 ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ),
    introduced(assumption,[]) ).

thf(h14,assumption,
    ! [X1: $i] :
      ( ( in @ X1 @ omega )
     => ( in @ ( setadjoin @ X1 @ X1 ) @ omega ) ),
    introduced(assumption,[]) ).

thf(h15,assumption,
    ~ ( ! [X1: $i] :
          ( ~ ( ( in @ emptyset @ X1 )
             => ~ ! [X2: $i] :
                    ( ~ ( ( in @ X2 @ omega )
                       => ~ ( in @ X2 @ X1 ) )
                   => ( in @ ( setadjoin @ X2 @ X2 ) @ X1 ) ) )
         => ! [X2: $i] :
              ( ( in @ X2 @ omega )
             => ( in @ X2 @ X1 ) ) )
     => ( ! [X1: $i > $i > $o,X2: $i] :
            ( ! [X3: $i] :
                ( ( in @ X3 @ X2 )
               => ~ ! [X4: $i] :
                      ( ( X1 @ X3 @ X4 )
                     => ~ ! [X5: $i] :
                            ( ( X1 @ X3 @ X5 )
                           => ( X4 = X5 ) ) ) )
           => ~ ! [X3: $i] :
                  ~ ! [X4: $i] :
                      ( ( in @ X4 @ X3 )
                      = ( ~ ! [X5: $i] :
                              ( ( in @ X5 @ X2 )
                             => ~ ( X1 @ X5 @ X4 ) ) ) ) )
       => ( ! [X1: $i] :
              ( ~ ! [X2: $i] :
                    ~ ( in @ X2 @ X1 )
             => ~ ! [X2: $i] :
                    ( ( in @ X2 @ X1 )
                   => ~ ! [X3: $i] :
                          ( ( in @ X3 @ X2 )
                         => ~ ( in @ X3 @ X1 ) ) ) )
         => ( ! [X1: $i] :
                ~ ! [X2: $i] :
                    ( ~ ( ~ ( ! [X3: $i] :
                                ( ( in @ X3 @ X2 )
                               => ! [X4: $i] :
                                    ( ( in @ X4 @ X3 )
                                   => ( in @ X4 @ X1 ) ) )
                           => ~ ! [X3: $i,X4: $i] :
                                  ( ~ ( ( in @ X3 @ X1 )
                                     => ~ ( in @ X4 @ X1 ) )
                                 => ( ! [X5: $i] :
                                        ( ( in @ X5 @ X2 )
                                       => ( ( in @ X3 @ X5 )
                                          = ( in @ X4 @ X5 ) ) )
                                   => ( X3 = X4 ) ) ) )
                       => ~ ! [X3: $i,X4: $i] :
                              ( ~ ( ( in @ X3 @ X2 )
                                 => ~ ( in @ X4 @ X2 ) )
                             => ( ~ ! [X5: $i] :
                                      ( ( in @ X5 @ X3 )
                                     => ( in @ X5 @ X4 ) )
                               => ! [X5: $i] :
                                    ( ( in @ X5 @ X4 )
                                   => ( in @ X5 @ X3 ) ) ) ) )
                   => ~ ! [X3: $i] :
                          ( ~ ( ! [X4: $i] :
                                  ( ( in @ X4 @ X3 )
                                 => ( in @ X4 @ X1 ) )
                             => ! [X4: $i] :
                                  ~ ( in @ X4 @ X3 ) )
                         => ~ ! [X4: $i,X5: $i] :
                                ( ~ ( ~ ( ( in @ X4 @ X2 )
                                       => ~ ( in @ X5 @ X3 ) )
                                   => ~ ! [X6: $i] :
                                          ( ( in @ X6 @ X4 )
                                         => ~ ( in @ X6 @ X3 ) ) )
                               => ~ ! [X6: $i] :
                                      ( ( in @ X6 @ X2 )
                                     => ( ~ ! [X7: $i] :
                                              ( ( in @ X7 @ X6 )
                                             => ( in @ X7 @ X4 ) )
                                       => ( in @ X5 @ X6 ) ) ) ) ) )
           => ( ! [X1: $i > $o] :
                  ( ~ ! [X2: $i] :
                        ( ( X1 @ X2 )
                       => ~ ! [X3: $i] :
                              ( ( X1 @ X3 )
                             => ( X2 = X3 ) ) )
                 => ( X1 @ ( descr @ X1 ) ) )
             => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                    ( ( in @ X3 @ X1 )
                   => ( ( X2 @ X3 )
                     => ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) ) ) )
               => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                      ( ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) )
                     => ( in @ X3 @ X1 ) )
                 => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                        ( ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) )
                       => ( X2 @ X3 ) )
                   => ( ! [X1: $i > $o] :
                          ( ~ ! [X2: $i] :
                                ( ( X1 @ X2 )
                               => ~ ! [X3: $i] :
                                      ( ( X1 @ X3 )
                                     => ( X2 = X3 ) ) )
                         => ~ ! [X2: $i] :
                                ( ( X1 @ X2 )
                               => ~ ! [X3: $i] :
                                      ( ( X1 @ X3 )
                                     => ( X2 = X3 ) ) ) )
                     => ( ! [X1: $o,X2: $i] :
                            ( ( in @ X2 @ ( prop2set @ X1 ) )
                           => X1 )
                       => ( ! [X1: $i] :
                              ( ( in @ X1 @ emptyset )
                             => ! [X2: $o] : X2 )
                         => ( ! [X1: $i] :
                                ~ ( in @ X1 @ emptyset )
                           => ( ! [X1: $i] :
                                  ~ ( in @ X1 @ emptyset )
                             => ( ! [X1: $i > $o] :
                                    ( ~ ! [X2: $i] :
                                          ( ( X1 @ X2 )
                                         => ~ ! [X3: $i] :
                                                ( ( X1 @ X3 )
                                               => ( X2 = X3 ) ) )
                                   => ~ ! [X2: $i] :
                                          ~ ( X1 @ X2 ) )
                               => ( ! [X1: $i,X2: $i] :
                                      ( ! [X3: $i] :
                                          ( ( in @ X3 @ X1 )
                                         => ( in @ X3 @ X2 ) )
                                     => ( ! [X3: $i] :
                                            ( ( in @ X3 @ X2 )
                                           => ( in @ X3 @ X1 ) )
                                       => ( X1 = X2 ) ) )
                                 => ( ! [X1: $i] :
                                        ( ! [X2: $i] :
                                            ~ ( in @ X2 @ X1 )
                                       => ( X1 = emptyset ) )
                                   => ( ! [X1: $i] :
                                          ( ! [X2: $i] :
                                              ~ ( in @ X2 @ X1 )
                                         => ( X1 = emptyset ) )
                                     => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                                            ( ( in @ X3 @ X1 )
                                           => ( ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) )
                                              = ( X2 @ X3 ) ) )
                                       => ( ! [X1: $i] :
                                              ( ( X1 != emptyset )
                                             => ~ ! [X2: $i] :
                                                    ~ ( in @ X2 @ X1 ) )
                                         => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                                                ( ( in @ X3 @ X1 )
                                               => ( ( X2 @ X3 )
                                                 => ( ( dsetconstr @ X1 @ X2 )
                                                   != emptyset ) ) )
                                           => ( ! [X1: $i] :
                                                  ( ~ ! [X2: $i] :
                                                        ~ ( in @ X2 @ X1 )
                                                 => ( X1 != emptyset ) )
                                             => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ X2 ) )
                                               => ( ( in @ emptyset @ ( setadjoin @ emptyset @ emptyset ) )
                                                 => ( ! [X1: $i,X2: $i,X3: $i] :
                                                        ( ( in @ X3 @ X2 )
                                                       => ( in @ X3 @ ( setadjoin @ X1 @ X2 ) ) )
                                                   => ( ! [X1: $i,X2: $i,X3: $i] :
                                                          ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
                                                         => ! [X4: $o] :
                                                              ( ( ( X3 = X1 )
                                                               => X4 )
                                                             => ( ( ( in @ X3 @ X2 )
                                                                 => X4 )
                                                               => X4 ) ) )
                                                     => ( ! [X1: $i,X2: $i,X3: $i] :
                                                            ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
                                                           => ( ( X3 != X1 )
                                                             => ( in @ X3 @ X2 ) ) )
                                                       => ( ! [X1: $i] :
                                                              ( ( dsetconstr @ X1
                                                                @ ^ [X2: $i] : ~ $false )
                                                              = X1 )
                                                         => ( ! [X1: $i,X2: $i] :
                                                                ( ! [X3: $i] :
                                                                    ( ( in @ X3 @ X2 )
                                                                   => ( in @ X3 @ X1 ) )
                                                               => ( in @ X2 @ ( powerset @ X1 ) ) )
                                                           => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
                                                             => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
                                                               => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                      ( ( in @ X2 @ ( powerset @ X1 ) )
                                                                     => ( ( in @ X3 @ X2 )
                                                                       => ( in @ X3 @ X1 ) ) )
                                                                 => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                        ( ( in @ X2 @ X3 )
                                                                       => ( ( in @ X3 @ X1 )
                                                                         => ( in @ X2 @ ( setunion @ X1 ) ) ) )
                                                                   => ( ! [X1: $i,X2: $i] :
                                                                          ( ( in @ X2 @ ( setunion @ X1 ) )
                                                                         => ! [X3: $o] :
                                                                              ( ! [X4: $i] :
                                                                                  ( ( in @ X2 @ X4 )
                                                                                 => ( ( in @ X4 @ X1 )
                                                                                   => X3 ) )
                                                                             => X3 ) )
                                                                     => ( ! [X1: $i,X2: $i] :
                                                                            ( ( in @ X2 @ X1 )
                                                                           => ( in @ X2 @ ( powerset @ ( setunion @ X1 ) ) ) )
                                                                       => ( ! [X1: $i > $o] :
                                                                              ( ~ ! [X2: $i] :
                                                                                    ( ( X1 @ X2 )
                                                                                   => ~ ! [X3: $i] :
                                                                                          ( ( X1 @ X3 )
                                                                                         => ( X2 = X3 ) ) )
                                                                             => ~ ! [X2: $i] :
                                                                                    ~ ! [X3: $i] :
                                                                                        ( ( X1 @ X3 )
                                                                                        = ( X3 = X2 ) ) )
                                                                         => ( ! [X1: $i] :
                                                                                ( ( X1 != emptyset )
                                                                               => ~ ! [X2: $i] :
                                                                                      ~ ( in @ X2 @ X1 ) )
                                                                           => ( ! [X1: $i,X2: $i] :
                                                                                  ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                                                                 => ( X1 = X2 ) )
                                                                             => ( ! [X1: $i,X2: $i] :
                                                                                    ( ( X1 != X2 )
                                                                                   => ~ ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                                                                               => ( ! [X1: $i,X2: $i] :
                                                                                      ( ( X1 = X2 )
                                                                                     => ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                                 => ( ! [X1: $i,X2: $i] :
                                                                                        ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                                                                       => ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                                                                                   => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                                          ( ( in @ X3 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                                         => ( ( X3 != X1 )
                                                                                           => ( X3 = X2 ) ) )
                                                                                     => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                                       => ( ! [X1: $i,X2: $i] : ( in @ X2 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                                         => ( ! [X1: $i,X2: $i > $o] :
                                                                                                ( ~ ! [X3: $i] :
                                                                                                      ( ( in @ X3 @ X1 )
                                                                                                     => ~ ( X2 @ X3 ) )
                                                                                               => ( ( dsetconstr @ X1 @ X2 )
                                                                                                 != emptyset ) )
                                                                                           => ( ! [X1: $i > $o,X2: $i] :
                                                                                                  ( ( in @ X2 @ emptyset )
                                                                                                 => ( X1 @ X2 ) )
                                                                                             => ( ! [X1: $i,X2: $i > $o] :
                                                                                                    ( ~ ! [X3: $i] :
                                                                                                          ( ( in @ X3 @ X1 )
                                                                                                         => ( X2 @ X3 ) )
                                                                                                   => ~ ! [X3: $i] :
                                                                                                          ( ( in @ X3 @ X1 )
                                                                                                         => ( X2 @ X3 ) ) )
                                                                                               => ( ! [X1: $i,X2: $i > $o] :
                                                                                                      ( ! [X3: $i] :
                                                                                                          ( ( in @ X3 @ X1 )
                                                                                                         => ~ ( X2 @ X3 ) )
                                                                                                     => ! [X3: $i] :
                                                                                                          ( ( in @ X3 @ X1 )
                                                                                                         => ~ ( X2 @ X3 ) ) )
                                                                                                 => ( ! [X1: $i,X2: $i > $o] :
                                                                                                        ( ! [X3: $i] :
                                                                                                            ( ( in @ X3 @ X1 )
                                                                                                           => ~ ( X2 @ X3 ) )
                                                                                                       => ! [X3: $i] :
                                                                                                            ( ( in @ X3 @ X1 )
                                                                                                           => ~ ( X2 @ X3 ) ) )
                                                                                                   => ( ! [X1: $i,X2: $i > $o] :
                                                                                                          ( ~ ! [X3: $i] :
                                                                                                                ( ( in @ X3 @ X1 )
                                                                                                               => ( X2 @ X3 ) )
                                                                                                         => ~ ! [X3: $i] :
                                                                                                                ( ( in @ X3 @ X1 )
                                                                                                               => ( X2 @ X3 ) ) )
                                                                                                     => ( ! [X1: $o] :
                                                                                                            ( X1
                                                                                                           => ( in @ emptyset @ ( prop2set @ X1 ) ) )
                                                                                                       => ( ! [X1: $o] :
                                                                                                              ( X1
                                                                                                             => ( set2prop @ ( prop2set @ X1 ) ) )
                                                                                                         => ( ! [X1: $i,X2: $i > $o] :
                                                                                                                ( ! [X3: $i] :
                                                                                                                    ( ( in @ X3 @ X1 )
                                                                                                                   => ~ ( X2 @ X3 ) )
                                                                                                               => ! [X3: $i] :
                                                                                                                    ( ( in @ X3 @ X1 )
                                                                                                                   => ~ ( X2 @ X3 ) ) )
                                                                                                           => ( ! [X1: $i,X2: $i > $o] :
                                                                                                                  ( ~ ! [X3: $i] :
                                                                                                                        ( ( in @ X3 @ X1 )
                                                                                                                       => ( X2 @ X3 ) )
                                                                                                                 => ~ ! [X3: $i] :
                                                                                                                        ( ( in @ X3 @ X1 )
                                                                                                                       => ( X2 @ X3 ) ) )
                                                                                                             => ( ! [X1: $i > $o] :
                                                                                                                    ( ~ ! [X2: $i] :
                                                                                                                          ( ( X1 @ X2 )
                                                                                                                         => ~ ! [X3: $i] :
                                                                                                                                ( ( X1 @ X3 )
                                                                                                                               => ( X2 = X3 ) ) )
                                                                                                                   => ~ ! [X2: $i] :
                                                                                                                          ( ( X1 @ X2 )
                                                                                                                         => ~ ! [X3: $i] :
                                                                                                                                ( ( X1 @ X3 )
                                                                                                                               => ( X2 = X3 ) ) ) )
                                                                                                               => ( ! [X1: $i > $o] :
                                                                                                                      ( ~ ! [X2: $i] :
                                                                                                                            ~ ( X1 @ X2 )
                                                                                                                     => ( ! [X2: $i,X3: $i] :
                                                                                                                            ( ( X1 @ X2 )
                                                                                                                           => ( ( X1 @ X3 )
                                                                                                                             => ( X2 = X3 ) ) )
                                                                                                                       => ~ ! [X2: $i] :
                                                                                                                              ( ( X1 @ X2 )
                                                                                                                             => ~ ! [X3: $i] :
                                                                                                                                    ( ( X1 @ X3 )
                                                                                                                                   => ( X2 = X3 ) ) ) ) )
                                                                                                                 => ! [X1: $i > $o] :
                                                                                                                      ( ~ ! [X2: $i] :
                                                                                                                            ~ ! [X3: $i] :
                                                                                                                                ( ( X1 @ X3 )
                                                                                                                                = ( X3 = X2 ) )
                                                                                                                     => ~ ! [X2: $i] :
                                                                                                                            ( ( X1 @ X2 )
                                                                                                                           => ~ ! [X3: $i] :
                                                                                                                                  ( ( X1 @ X3 )
                                                                                                                                 => ( X2 = X3 ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ),
    introduced(assumption,[]) ).

thf(h16,assumption,
    ! [X1: $i] :
      ( ~ ( ( in @ emptyset @ X1 )
         => ~ ! [X2: $i] :
                ( ~ ( ( in @ X2 @ omega )
                   => ~ ( in @ X2 @ X1 ) )
               => ( in @ ( setadjoin @ X2 @ X2 ) @ X1 ) ) )
     => ! [X2: $i] :
          ( ( in @ X2 @ omega )
         => ( in @ X2 @ X1 ) ) ),
    introduced(assumption,[]) ).

thf(h17,assumption,
    ~ ( ! [X1: $i > $i > $o,X2: $i] :
          ( ! [X3: $i] :
              ( ( in @ X3 @ X2 )
             => ~ ! [X4: $i] :
                    ( ( X1 @ X3 @ X4 )
                   => ~ ! [X5: $i] :
                          ( ( X1 @ X3 @ X5 )
                         => ( X4 = X5 ) ) ) )
         => ~ ! [X3: $i] :
                ~ ! [X4: $i] :
                    ( ( in @ X4 @ X3 )
                    = ( ~ ! [X5: $i] :
                            ( ( in @ X5 @ X2 )
                           => ~ ( X1 @ X5 @ X4 ) ) ) ) )
     => ( ! [X1: $i] :
            ( ~ ! [X2: $i] :
                  ~ ( in @ X2 @ X1 )
           => ~ ! [X2: $i] :
                  ( ( in @ X2 @ X1 )
                 => ~ ! [X3: $i] :
                        ( ( in @ X3 @ X2 )
                       => ~ ( in @ X3 @ X1 ) ) ) )
       => ( ! [X1: $i] :
              ~ ! [X2: $i] :
                  ( ~ ( ~ ( ! [X3: $i] :
                              ( ( in @ X3 @ X2 )
                             => ! [X4: $i] :
                                  ( ( in @ X4 @ X3 )
                                 => ( in @ X4 @ X1 ) ) )
                         => ~ ! [X3: $i,X4: $i] :
                                ( ~ ( ( in @ X3 @ X1 )
                                   => ~ ( in @ X4 @ X1 ) )
                               => ( ! [X5: $i] :
                                      ( ( in @ X5 @ X2 )
                                     => ( ( in @ X3 @ X5 )
                                        = ( in @ X4 @ X5 ) ) )
                                 => ( X3 = X4 ) ) ) )
                     => ~ ! [X3: $i,X4: $i] :
                            ( ~ ( ( in @ X3 @ X2 )
                               => ~ ( in @ X4 @ X2 ) )
                           => ( ~ ! [X5: $i] :
                                    ( ( in @ X5 @ X3 )
                                   => ( in @ X5 @ X4 ) )
                             => ! [X5: $i] :
                                  ( ( in @ X5 @ X4 )
                                 => ( in @ X5 @ X3 ) ) ) ) )
                 => ~ ! [X3: $i] :
                        ( ~ ( ! [X4: $i] :
                                ( ( in @ X4 @ X3 )
                               => ( in @ X4 @ X1 ) )
                           => ! [X4: $i] :
                                ~ ( in @ X4 @ X3 ) )
                       => ~ ! [X4: $i,X5: $i] :
                              ( ~ ( ~ ( ( in @ X4 @ X2 )
                                     => ~ ( in @ X5 @ X3 ) )
                                 => ~ ! [X6: $i] :
                                        ( ( in @ X6 @ X4 )
                                       => ~ ( in @ X6 @ X3 ) ) )
                             => ~ ! [X6: $i] :
                                    ( ( in @ X6 @ X2 )
                                   => ( ~ ! [X7: $i] :
                                            ( ( in @ X7 @ X6 )
                                           => ( in @ X7 @ X4 ) )
                                     => ( in @ X5 @ X6 ) ) ) ) ) )
         => ( ! [X1: $i > $o] :
                ( ~ ! [X2: $i] :
                      ( ( X1 @ X2 )
                     => ~ ! [X3: $i] :
                            ( ( X1 @ X3 )
                           => ( X2 = X3 ) ) )
               => ( X1 @ ( descr @ X1 ) ) )
           => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                  ( ( in @ X3 @ X1 )
                 => ( ( X2 @ X3 )
                   => ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) ) ) )
             => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                    ( ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) )
                   => ( in @ X3 @ X1 ) )
               => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                      ( ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) )
                     => ( X2 @ X3 ) )
                 => ( ! [X1: $i > $o] :
                        ( ~ ! [X2: $i] :
                              ( ( X1 @ X2 )
                             => ~ ! [X3: $i] :
                                    ( ( X1 @ X3 )
                                   => ( X2 = X3 ) ) )
                       => ~ ! [X2: $i] :
                              ( ( X1 @ X2 )
                             => ~ ! [X3: $i] :
                                    ( ( X1 @ X3 )
                                   => ( X2 = X3 ) ) ) )
                   => ( ! [X1: $o,X2: $i] :
                          ( ( in @ X2 @ ( prop2set @ X1 ) )
                         => X1 )
                     => ( ! [X1: $i] :
                            ( ( in @ X1 @ emptyset )
                           => ! [X2: $o] : X2 )
                       => ( ! [X1: $i] :
                              ~ ( in @ X1 @ emptyset )
                         => ( ! [X1: $i] :
                                ~ ( in @ X1 @ emptyset )
                           => ( ! [X1: $i > $o] :
                                  ( ~ ! [X2: $i] :
                                        ( ( X1 @ X2 )
                                       => ~ ! [X3: $i] :
                                              ( ( X1 @ X3 )
                                             => ( X2 = X3 ) ) )
                                 => ~ ! [X2: $i] :
                                        ~ ( X1 @ X2 ) )
                             => ( ! [X1: $i,X2: $i] :
                                    ( ! [X3: $i] :
                                        ( ( in @ X3 @ X1 )
                                       => ( in @ X3 @ X2 ) )
                                   => ( ! [X3: $i] :
                                          ( ( in @ X3 @ X2 )
                                         => ( in @ X3 @ X1 ) )
                                     => ( X1 = X2 ) ) )
                               => ( ! [X1: $i] :
                                      ( ! [X2: $i] :
                                          ~ ( in @ X2 @ X1 )
                                     => ( X1 = emptyset ) )
                                 => ( ! [X1: $i] :
                                        ( ! [X2: $i] :
                                            ~ ( in @ X2 @ X1 )
                                       => ( X1 = emptyset ) )
                                   => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                                          ( ( in @ X3 @ X1 )
                                         => ( ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) )
                                            = ( X2 @ X3 ) ) )
                                     => ( ! [X1: $i] :
                                            ( ( X1 != emptyset )
                                           => ~ ! [X2: $i] :
                                                  ~ ( in @ X2 @ X1 ) )
                                       => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                                              ( ( in @ X3 @ X1 )
                                             => ( ( X2 @ X3 )
                                               => ( ( dsetconstr @ X1 @ X2 )
                                                 != emptyset ) ) )
                                         => ( ! [X1: $i] :
                                                ( ~ ! [X2: $i] :
                                                      ~ ( in @ X2 @ X1 )
                                               => ( X1 != emptyset ) )
                                           => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ X2 ) )
                                             => ( ( in @ emptyset @ ( setadjoin @ emptyset @ emptyset ) )
                                               => ( ! [X1: $i,X2: $i,X3: $i] :
                                                      ( ( in @ X3 @ X2 )
                                                     => ( in @ X3 @ ( setadjoin @ X1 @ X2 ) ) )
                                                 => ( ! [X1: $i,X2: $i,X3: $i] :
                                                        ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
                                                       => ! [X4: $o] :
                                                            ( ( ( X3 = X1 )
                                                             => X4 )
                                                           => ( ( ( in @ X3 @ X2 )
                                                               => X4 )
                                                             => X4 ) ) )
                                                   => ( ! [X1: $i,X2: $i,X3: $i] :
                                                          ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
                                                         => ( ( X3 != X1 )
                                                           => ( in @ X3 @ X2 ) ) )
                                                     => ( ! [X1: $i] :
                                                            ( ( dsetconstr @ X1
                                                              @ ^ [X2: $i] : ~ $false )
                                                            = X1 )
                                                       => ( ! [X1: $i,X2: $i] :
                                                              ( ! [X3: $i] :
                                                                  ( ( in @ X3 @ X2 )
                                                                 => ( in @ X3 @ X1 ) )
                                                             => ( in @ X2 @ ( powerset @ X1 ) ) )
                                                         => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
                                                           => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
                                                             => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                    ( ( in @ X2 @ ( powerset @ X1 ) )
                                                                   => ( ( in @ X3 @ X2 )
                                                                     => ( in @ X3 @ X1 ) ) )
                                                               => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                      ( ( in @ X2 @ X3 )
                                                                     => ( ( in @ X3 @ X1 )
                                                                       => ( in @ X2 @ ( setunion @ X1 ) ) ) )
                                                                 => ( ! [X1: $i,X2: $i] :
                                                                        ( ( in @ X2 @ ( setunion @ X1 ) )
                                                                       => ! [X3: $o] :
                                                                            ( ! [X4: $i] :
                                                                                ( ( in @ X2 @ X4 )
                                                                               => ( ( in @ X4 @ X1 )
                                                                                 => X3 ) )
                                                                           => X3 ) )
                                                                   => ( ! [X1: $i,X2: $i] :
                                                                          ( ( in @ X2 @ X1 )
                                                                         => ( in @ X2 @ ( powerset @ ( setunion @ X1 ) ) ) )
                                                                     => ( ! [X1: $i > $o] :
                                                                            ( ~ ! [X2: $i] :
                                                                                  ( ( X1 @ X2 )
                                                                                 => ~ ! [X3: $i] :
                                                                                        ( ( X1 @ X3 )
                                                                                       => ( X2 = X3 ) ) )
                                                                           => ~ ! [X2: $i] :
                                                                                  ~ ! [X3: $i] :
                                                                                      ( ( X1 @ X3 )
                                                                                      = ( X3 = X2 ) ) )
                                                                       => ( ! [X1: $i] :
                                                                              ( ( X1 != emptyset )
                                                                             => ~ ! [X2: $i] :
                                                                                    ~ ( in @ X2 @ X1 ) )
                                                                         => ( ! [X1: $i,X2: $i] :
                                                                                ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                                                               => ( X1 = X2 ) )
                                                                           => ( ! [X1: $i,X2: $i] :
                                                                                  ( ( X1 != X2 )
                                                                                 => ~ ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                                                                             => ( ! [X1: $i,X2: $i] :
                                                                                    ( ( X1 = X2 )
                                                                                   => ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                               => ( ! [X1: $i,X2: $i] :
                                                                                      ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                                                                     => ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                                                                                 => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                                        ( ( in @ X3 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                                       => ( ( X3 != X1 )
                                                                                         => ( X3 = X2 ) ) )
                                                                                   => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                                     => ( ! [X1: $i,X2: $i] : ( in @ X2 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                                       => ( ! [X1: $i,X2: $i > $o] :
                                                                                              ( ~ ! [X3: $i] :
                                                                                                    ( ( in @ X3 @ X1 )
                                                                                                   => ~ ( X2 @ X3 ) )
                                                                                             => ( ( dsetconstr @ X1 @ X2 )
                                                                                               != emptyset ) )
                                                                                         => ( ! [X1: $i > $o,X2: $i] :
                                                                                                ( ( in @ X2 @ emptyset )
                                                                                               => ( X1 @ X2 ) )
                                                                                           => ( ! [X1: $i,X2: $i > $o] :
                                                                                                  ( ~ ! [X3: $i] :
                                                                                                        ( ( in @ X3 @ X1 )
                                                                                                       => ( X2 @ X3 ) )
                                                                                                 => ~ ! [X3: $i] :
                                                                                                        ( ( in @ X3 @ X1 )
                                                                                                       => ( X2 @ X3 ) ) )
                                                                                             => ( ! [X1: $i,X2: $i > $o] :
                                                                                                    ( ! [X3: $i] :
                                                                                                        ( ( in @ X3 @ X1 )
                                                                                                       => ~ ( X2 @ X3 ) )
                                                                                                   => ! [X3: $i] :
                                                                                                        ( ( in @ X3 @ X1 )
                                                                                                       => ~ ( X2 @ X3 ) ) )
                                                                                               => ( ! [X1: $i,X2: $i > $o] :
                                                                                                      ( ! [X3: $i] :
                                                                                                          ( ( in @ X3 @ X1 )
                                                                                                         => ~ ( X2 @ X3 ) )
                                                                                                     => ! [X3: $i] :
                                                                                                          ( ( in @ X3 @ X1 )
                                                                                                         => ~ ( X2 @ X3 ) ) )
                                                                                                 => ( ! [X1: $i,X2: $i > $o] :
                                                                                                        ( ~ ! [X3: $i] :
                                                                                                              ( ( in @ X3 @ X1 )
                                                                                                             => ( X2 @ X3 ) )
                                                                                                       => ~ ! [X3: $i] :
                                                                                                              ( ( in @ X3 @ X1 )
                                                                                                             => ( X2 @ X3 ) ) )
                                                                                                   => ( ! [X1: $o] :
                                                                                                          ( X1
                                                                                                         => ( in @ emptyset @ ( prop2set @ X1 ) ) )
                                                                                                     => ( ! [X1: $o] :
                                                                                                            ( X1
                                                                                                           => ( set2prop @ ( prop2set @ X1 ) ) )
                                                                                                       => ( ! [X1: $i,X2: $i > $o] :
                                                                                                              ( ! [X3: $i] :
                                                                                                                  ( ( in @ X3 @ X1 )
                                                                                                                 => ~ ( X2 @ X3 ) )
                                                                                                             => ! [X3: $i] :
                                                                                                                  ( ( in @ X3 @ X1 )
                                                                                                                 => ~ ( X2 @ X3 ) ) )
                                                                                                         => ( ! [X1: $i,X2: $i > $o] :
                                                                                                                ( ~ ! [X3: $i] :
                                                                                                                      ( ( in @ X3 @ X1 )
                                                                                                                     => ( X2 @ X3 ) )
                                                                                                               => ~ ! [X3: $i] :
                                                                                                                      ( ( in @ X3 @ X1 )
                                                                                                                     => ( X2 @ X3 ) ) )
                                                                                                           => ( ! [X1: $i > $o] :
                                                                                                                  ( ~ ! [X2: $i] :
                                                                                                                        ( ( X1 @ X2 )
                                                                                                                       => ~ ! [X3: $i] :
                                                                                                                              ( ( X1 @ X3 )
                                                                                                                             => ( X2 = X3 ) ) )
                                                                                                                 => ~ ! [X2: $i] :
                                                                                                                        ( ( X1 @ X2 )
                                                                                                                       => ~ ! [X3: $i] :
                                                                                                                              ( ( X1 @ X3 )
                                                                                                                             => ( X2 = X3 ) ) ) )
                                                                                                             => ( ! [X1: $i > $o] :
                                                                                                                    ( ~ ! [X2: $i] :
                                                                                                                          ~ ( X1 @ X2 )
                                                                                                                   => ( ! [X2: $i,X3: $i] :
                                                                                                                          ( ( X1 @ X2 )
                                                                                                                         => ( ( X1 @ X3 )
                                                                                                                           => ( X2 = X3 ) ) )
                                                                                                                     => ~ ! [X2: $i] :
                                                                                                                            ( ( X1 @ X2 )
                                                                                                                           => ~ ! [X3: $i] :
                                                                                                                                  ( ( X1 @ X3 )
                                                                                                                                 => ( X2 = X3 ) ) ) ) )
                                                                                                               => ! [X1: $i > $o] :
                                                                                                                    ( ~ ! [X2: $i] :
                                                                                                                          ~ ! [X3: $i] :
                                                                                                                              ( ( X1 @ X3 )
                                                                                                                              = ( X3 = X2 ) )
                                                                                                                   => ~ ! [X2: $i] :
                                                                                                                          ( ( X1 @ X2 )
                                                                                                                         => ~ ! [X3: $i] :
                                                                                                                                ( ( X1 @ X3 )
                                                                                                                               => ( X2 = X3 ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ),
    introduced(assumption,[]) ).

thf(h18,assumption,
    ! [X1: $i > $i > $o,X2: $i] :
      ( ! [X3: $i] :
          ( ( in @ X3 @ X2 )
         => ~ ! [X4: $i] :
                ( ( X1 @ X3 @ X4 )
               => ~ ! [X5: $i] :
                      ( ( X1 @ X3 @ X5 )
                     => ( X4 = X5 ) ) ) )
     => ~ ! [X3: $i] :
            ~ ! [X4: $i] :
                ( ( in @ X4 @ X3 )
                = ( ~ ! [X5: $i] :
                        ( ( in @ X5 @ X2 )
                       => ~ ( X1 @ X5 @ X4 ) ) ) ) ),
    introduced(assumption,[]) ).

thf(h19,assumption,
    ~ ( ! [X1: $i] :
          ( ~ ! [X2: $i] :
                ~ ( in @ X2 @ X1 )
         => ~ ! [X2: $i] :
                ( ( in @ X2 @ X1 )
               => ~ ! [X3: $i] :
                      ( ( in @ X3 @ X2 )
                     => ~ ( in @ X3 @ X1 ) ) ) )
     => ( ! [X1: $i] :
            ~ ! [X2: $i] :
                ( ~ ( ~ ( ! [X3: $i] :
                            ( ( in @ X3 @ X2 )
                           => ! [X4: $i] :
                                ( ( in @ X4 @ X3 )
                               => ( in @ X4 @ X1 ) ) )
                       => ~ ! [X3: $i,X4: $i] :
                              ( ~ ( ( in @ X3 @ X1 )
                                 => ~ ( in @ X4 @ X1 ) )
                             => ( ! [X5: $i] :
                                    ( ( in @ X5 @ X2 )
                                   => ( ( in @ X3 @ X5 )
                                      = ( in @ X4 @ X5 ) ) )
                               => ( X3 = X4 ) ) ) )
                   => ~ ! [X3: $i,X4: $i] :
                          ( ~ ( ( in @ X3 @ X2 )
                             => ~ ( in @ X4 @ X2 ) )
                         => ( ~ ! [X5: $i] :
                                  ( ( in @ X5 @ X3 )
                                 => ( in @ X5 @ X4 ) )
                           => ! [X5: $i] :
                                ( ( in @ X5 @ X4 )
                               => ( in @ X5 @ X3 ) ) ) ) )
               => ~ ! [X3: $i] :
                      ( ~ ( ! [X4: $i] :
                              ( ( in @ X4 @ X3 )
                             => ( in @ X4 @ X1 ) )
                         => ! [X4: $i] :
                              ~ ( in @ X4 @ X3 ) )
                     => ~ ! [X4: $i,X5: $i] :
                            ( ~ ( ~ ( ( in @ X4 @ X2 )
                                   => ~ ( in @ X5 @ X3 ) )
                               => ~ ! [X6: $i] :
                                      ( ( in @ X6 @ X4 )
                                     => ~ ( in @ X6 @ X3 ) ) )
                           => ~ ! [X6: $i] :
                                  ( ( in @ X6 @ X2 )
                                 => ( ~ ! [X7: $i] :
                                          ( ( in @ X7 @ X6 )
                                         => ( in @ X7 @ X4 ) )
                                   => ( in @ X5 @ X6 ) ) ) ) ) )
       => ( ! [X1: $i > $o] :
              ( ~ ! [X2: $i] :
                    ( ( X1 @ X2 )
                   => ~ ! [X3: $i] :
                          ( ( X1 @ X3 )
                         => ( X2 = X3 ) ) )
             => ( X1 @ ( descr @ X1 ) ) )
         => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                ( ( in @ X3 @ X1 )
               => ( ( X2 @ X3 )
                 => ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) ) ) )
           => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                  ( ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) )
                 => ( in @ X3 @ X1 ) )
             => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                    ( ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) )
                   => ( X2 @ X3 ) )
               => ( ! [X1: $i > $o] :
                      ( ~ ! [X2: $i] :
                            ( ( X1 @ X2 )
                           => ~ ! [X3: $i] :
                                  ( ( X1 @ X3 )
                                 => ( X2 = X3 ) ) )
                     => ~ ! [X2: $i] :
                            ( ( X1 @ X2 )
                           => ~ ! [X3: $i] :
                                  ( ( X1 @ X3 )
                                 => ( X2 = X3 ) ) ) )
                 => ( ! [X1: $o,X2: $i] :
                        ( ( in @ X2 @ ( prop2set @ X1 ) )
                       => X1 )
                   => ( ! [X1: $i] :
                          ( ( in @ X1 @ emptyset )
                         => ! [X2: $o] : X2 )
                     => ( ! [X1: $i] :
                            ~ ( in @ X1 @ emptyset )
                       => ( ! [X1: $i] :
                              ~ ( in @ X1 @ emptyset )
                         => ( ! [X1: $i > $o] :
                                ( ~ ! [X2: $i] :
                                      ( ( X1 @ X2 )
                                     => ~ ! [X3: $i] :
                                            ( ( X1 @ X3 )
                                           => ( X2 = X3 ) ) )
                               => ~ ! [X2: $i] :
                                      ~ ( X1 @ X2 ) )
                           => ( ! [X1: $i,X2: $i] :
                                  ( ! [X3: $i] :
                                      ( ( in @ X3 @ X1 )
                                     => ( in @ X3 @ X2 ) )
                                 => ( ! [X3: $i] :
                                        ( ( in @ X3 @ X2 )
                                       => ( in @ X3 @ X1 ) )
                                   => ( X1 = X2 ) ) )
                             => ( ! [X1: $i] :
                                    ( ! [X2: $i] :
                                        ~ ( in @ X2 @ X1 )
                                   => ( X1 = emptyset ) )
                               => ( ! [X1: $i] :
                                      ( ! [X2: $i] :
                                          ~ ( in @ X2 @ X1 )
                                     => ( X1 = emptyset ) )
                                 => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                                        ( ( in @ X3 @ X1 )
                                       => ( ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) )
                                          = ( X2 @ X3 ) ) )
                                   => ( ! [X1: $i] :
                                          ( ( X1 != emptyset )
                                         => ~ ! [X2: $i] :
                                                ~ ( in @ X2 @ X1 ) )
                                     => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                                            ( ( in @ X3 @ X1 )
                                           => ( ( X2 @ X3 )
                                             => ( ( dsetconstr @ X1 @ X2 )
                                               != emptyset ) ) )
                                       => ( ! [X1: $i] :
                                              ( ~ ! [X2: $i] :
                                                    ~ ( in @ X2 @ X1 )
                                             => ( X1 != emptyset ) )
                                         => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ X2 ) )
                                           => ( ( in @ emptyset @ ( setadjoin @ emptyset @ emptyset ) )
                                             => ( ! [X1: $i,X2: $i,X3: $i] :
                                                    ( ( in @ X3 @ X2 )
                                                   => ( in @ X3 @ ( setadjoin @ X1 @ X2 ) ) )
                                               => ( ! [X1: $i,X2: $i,X3: $i] :
                                                      ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
                                                     => ! [X4: $o] :
                                                          ( ( ( X3 = X1 )
                                                           => X4 )
                                                         => ( ( ( in @ X3 @ X2 )
                                                             => X4 )
                                                           => X4 ) ) )
                                                 => ( ! [X1: $i,X2: $i,X3: $i] :
                                                        ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
                                                       => ( ( X3 != X1 )
                                                         => ( in @ X3 @ X2 ) ) )
                                                   => ( ! [X1: $i] :
                                                          ( ( dsetconstr @ X1
                                                            @ ^ [X2: $i] : ~ $false )
                                                          = X1 )
                                                     => ( ! [X1: $i,X2: $i] :
                                                            ( ! [X3: $i] :
                                                                ( ( in @ X3 @ X2 )
                                                               => ( in @ X3 @ X1 ) )
                                                           => ( in @ X2 @ ( powerset @ X1 ) ) )
                                                       => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
                                                         => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
                                                           => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                  ( ( in @ X2 @ ( powerset @ X1 ) )
                                                                 => ( ( in @ X3 @ X2 )
                                                                   => ( in @ X3 @ X1 ) ) )
                                                             => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                    ( ( in @ X2 @ X3 )
                                                                   => ( ( in @ X3 @ X1 )
                                                                     => ( in @ X2 @ ( setunion @ X1 ) ) ) )
                                                               => ( ! [X1: $i,X2: $i] :
                                                                      ( ( in @ X2 @ ( setunion @ X1 ) )
                                                                     => ! [X3: $o] :
                                                                          ( ! [X4: $i] :
                                                                              ( ( in @ X2 @ X4 )
                                                                             => ( ( in @ X4 @ X1 )
                                                                               => X3 ) )
                                                                         => X3 ) )
                                                                 => ( ! [X1: $i,X2: $i] :
                                                                        ( ( in @ X2 @ X1 )
                                                                       => ( in @ X2 @ ( powerset @ ( setunion @ X1 ) ) ) )
                                                                   => ( ! [X1: $i > $o] :
                                                                          ( ~ ! [X2: $i] :
                                                                                ( ( X1 @ X2 )
                                                                               => ~ ! [X3: $i] :
                                                                                      ( ( X1 @ X3 )
                                                                                     => ( X2 = X3 ) ) )
                                                                         => ~ ! [X2: $i] :
                                                                                ~ ! [X3: $i] :
                                                                                    ( ( X1 @ X3 )
                                                                                    = ( X3 = X2 ) ) )
                                                                     => ( ! [X1: $i] :
                                                                            ( ( X1 != emptyset )
                                                                           => ~ ! [X2: $i] :
                                                                                  ~ ( in @ X2 @ X1 ) )
                                                                       => ( ! [X1: $i,X2: $i] :
                                                                              ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                                                             => ( X1 = X2 ) )
                                                                         => ( ! [X1: $i,X2: $i] :
                                                                                ( ( X1 != X2 )
                                                                               => ~ ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                                                                           => ( ! [X1: $i,X2: $i] :
                                                                                  ( ( X1 = X2 )
                                                                                 => ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                             => ( ! [X1: $i,X2: $i] :
                                                                                    ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                                                                   => ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                                                                               => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                                      ( ( in @ X3 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                                     => ( ( X3 != X1 )
                                                                                       => ( X3 = X2 ) ) )
                                                                                 => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                                   => ( ! [X1: $i,X2: $i] : ( in @ X2 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                                     => ( ! [X1: $i,X2: $i > $o] :
                                                                                            ( ~ ! [X3: $i] :
                                                                                                  ( ( in @ X3 @ X1 )
                                                                                                 => ~ ( X2 @ X3 ) )
                                                                                           => ( ( dsetconstr @ X1 @ X2 )
                                                                                             != emptyset ) )
                                                                                       => ( ! [X1: $i > $o,X2: $i] :
                                                                                              ( ( in @ X2 @ emptyset )
                                                                                             => ( X1 @ X2 ) )
                                                                                         => ( ! [X1: $i,X2: $i > $o] :
                                                                                                ( ~ ! [X3: $i] :
                                                                                                      ( ( in @ X3 @ X1 )
                                                                                                     => ( X2 @ X3 ) )
                                                                                               => ~ ! [X3: $i] :
                                                                                                      ( ( in @ X3 @ X1 )
                                                                                                     => ( X2 @ X3 ) ) )
                                                                                           => ( ! [X1: $i,X2: $i > $o] :
                                                                                                  ( ! [X3: $i] :
                                                                                                      ( ( in @ X3 @ X1 )
                                                                                                     => ~ ( X2 @ X3 ) )
                                                                                                 => ! [X3: $i] :
                                                                                                      ( ( in @ X3 @ X1 )
                                                                                                     => ~ ( X2 @ X3 ) ) )
                                                                                             => ( ! [X1: $i,X2: $i > $o] :
                                                                                                    ( ! [X3: $i] :
                                                                                                        ( ( in @ X3 @ X1 )
                                                                                                       => ~ ( X2 @ X3 ) )
                                                                                                   => ! [X3: $i] :
                                                                                                        ( ( in @ X3 @ X1 )
                                                                                                       => ~ ( X2 @ X3 ) ) )
                                                                                               => ( ! [X1: $i,X2: $i > $o] :
                                                                                                      ( ~ ! [X3: $i] :
                                                                                                            ( ( in @ X3 @ X1 )
                                                                                                           => ( X2 @ X3 ) )
                                                                                                     => ~ ! [X3: $i] :
                                                                                                            ( ( in @ X3 @ X1 )
                                                                                                           => ( X2 @ X3 ) ) )
                                                                                                 => ( ! [X1: $o] :
                                                                                                        ( X1
                                                                                                       => ( in @ emptyset @ ( prop2set @ X1 ) ) )
                                                                                                   => ( ! [X1: $o] :
                                                                                                          ( X1
                                                                                                         => ( set2prop @ ( prop2set @ X1 ) ) )
                                                                                                     => ( ! [X1: $i,X2: $i > $o] :
                                                                                                            ( ! [X3: $i] :
                                                                                                                ( ( in @ X3 @ X1 )
                                                                                                               => ~ ( X2 @ X3 ) )
                                                                                                           => ! [X3: $i] :
                                                                                                                ( ( in @ X3 @ X1 )
                                                                                                               => ~ ( X2 @ X3 ) ) )
                                                                                                       => ( ! [X1: $i,X2: $i > $o] :
                                                                                                              ( ~ ! [X3: $i] :
                                                                                                                    ( ( in @ X3 @ X1 )
                                                                                                                   => ( X2 @ X3 ) )
                                                                                                             => ~ ! [X3: $i] :
                                                                                                                    ( ( in @ X3 @ X1 )
                                                                                                                   => ( X2 @ X3 ) ) )
                                                                                                         => ( ! [X1: $i > $o] :
                                                                                                                ( ~ ! [X2: $i] :
                                                                                                                      ( ( X1 @ X2 )
                                                                                                                     => ~ ! [X3: $i] :
                                                                                                                            ( ( X1 @ X3 )
                                                                                                                           => ( X2 = X3 ) ) )
                                                                                                               => ~ ! [X2: $i] :
                                                                                                                      ( ( X1 @ X2 )
                                                                                                                     => ~ ! [X3: $i] :
                                                                                                                            ( ( X1 @ X3 )
                                                                                                                           => ( X2 = X3 ) ) ) )
                                                                                                           => ( ! [X1: $i > $o] :
                                                                                                                  ( ~ ! [X2: $i] :
                                                                                                                        ~ ( X1 @ X2 )
                                                                                                                 => ( ! [X2: $i,X3: $i] :
                                                                                                                        ( ( X1 @ X2 )
                                                                                                                       => ( ( X1 @ X3 )
                                                                                                                         => ( X2 = X3 ) ) )
                                                                                                                   => ~ ! [X2: $i] :
                                                                                                                          ( ( X1 @ X2 )
                                                                                                                         => ~ ! [X3: $i] :
                                                                                                                                ( ( X1 @ X3 )
                                                                                                                               => ( X2 = X3 ) ) ) ) )
                                                                                                             => ! [X1: $i > $o] :
                                                                                                                  ( ~ ! [X2: $i] :
                                                                                                                        ~ ! [X3: $i] :
                                                                                                                            ( ( X1 @ X3 )
                                                                                                                            = ( X3 = X2 ) )
                                                                                                                 => ~ ! [X2: $i] :
                                                                                                                        ( ( X1 @ X2 )
                                                                                                                       => ~ ! [X3: $i] :
                                                                                                                              ( ( X1 @ X3 )
                                                                                                                             => ( X2 = X3 ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ),
    introduced(assumption,[]) ).

thf(h20,assumption,
    ! [X1: $i] :
      ( ~ ! [X2: $i] :
            ~ ( in @ X2 @ X1 )
     => ~ ! [X2: $i] :
            ( ( in @ X2 @ X1 )
           => ~ ! [X3: $i] :
                  ( ( in @ X3 @ X2 )
                 => ~ ( in @ X3 @ X1 ) ) ) ),
    introduced(assumption,[]) ).

thf(h21,assumption,
    ~ ( ! [X1: $i] :
          ~ ! [X2: $i] :
              ( ~ ( ~ ( ! [X3: $i] :
                          ( ( in @ X3 @ X2 )
                         => ! [X4: $i] :
                              ( ( in @ X4 @ X3 )
                             => ( in @ X4 @ X1 ) ) )
                     => ~ ! [X3: $i,X4: $i] :
                            ( ~ ( ( in @ X3 @ X1 )
                               => ~ ( in @ X4 @ X1 ) )
                           => ( ! [X5: $i] :
                                  ( ( in @ X5 @ X2 )
                                 => ( ( in @ X3 @ X5 )
                                    = ( in @ X4 @ X5 ) ) )
                             => ( X3 = X4 ) ) ) )
                 => ~ ! [X3: $i,X4: $i] :
                        ( ~ ( ( in @ X3 @ X2 )
                           => ~ ( in @ X4 @ X2 ) )
                       => ( ~ ! [X5: $i] :
                                ( ( in @ X5 @ X3 )
                               => ( in @ X5 @ X4 ) )
                         => ! [X5: $i] :
                              ( ( in @ X5 @ X4 )
                             => ( in @ X5 @ X3 ) ) ) ) )
             => ~ ! [X3: $i] :
                    ( ~ ( ! [X4: $i] :
                            ( ( in @ X4 @ X3 )
                           => ( in @ X4 @ X1 ) )
                       => ! [X4: $i] :
                            ~ ( in @ X4 @ X3 ) )
                   => ~ ! [X4: $i,X5: $i] :
                          ( ~ ( ~ ( ( in @ X4 @ X2 )
                                 => ~ ( in @ X5 @ X3 ) )
                             => ~ ! [X6: $i] :
                                    ( ( in @ X6 @ X4 )
                                   => ~ ( in @ X6 @ X3 ) ) )
                         => ~ ! [X6: $i] :
                                ( ( in @ X6 @ X2 )
                               => ( ~ ! [X7: $i] :
                                        ( ( in @ X7 @ X6 )
                                       => ( in @ X7 @ X4 ) )
                                 => ( in @ X5 @ X6 ) ) ) ) ) )
     => ( ! [X1: $i > $o] :
            ( ~ ! [X2: $i] :
                  ( ( X1 @ X2 )
                 => ~ ! [X3: $i] :
                        ( ( X1 @ X3 )
                       => ( X2 = X3 ) ) )
           => ( X1 @ ( descr @ X1 ) ) )
       => ( ! [X1: $i,X2: $i > $o,X3: $i] :
              ( ( in @ X3 @ X1 )
             => ( ( X2 @ X3 )
               => ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) ) ) )
         => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                ( ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) )
               => ( in @ X3 @ X1 ) )
           => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                  ( ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) )
                 => ( X2 @ X3 ) )
             => ( ! [X1: $i > $o] :
                    ( ~ ! [X2: $i] :
                          ( ( X1 @ X2 )
                         => ~ ! [X3: $i] :
                                ( ( X1 @ X3 )
                               => ( X2 = X3 ) ) )
                   => ~ ! [X2: $i] :
                          ( ( X1 @ X2 )
                         => ~ ! [X3: $i] :
                                ( ( X1 @ X3 )
                               => ( X2 = X3 ) ) ) )
               => ( ! [X1: $o,X2: $i] :
                      ( ( in @ X2 @ ( prop2set @ X1 ) )
                     => X1 )
                 => ( ! [X1: $i] :
                        ( ( in @ X1 @ emptyset )
                       => ! [X2: $o] : X2 )
                   => ( ! [X1: $i] :
                          ~ ( in @ X1 @ emptyset )
                     => ( ! [X1: $i] :
                            ~ ( in @ X1 @ emptyset )
                       => ( ! [X1: $i > $o] :
                              ( ~ ! [X2: $i] :
                                    ( ( X1 @ X2 )
                                   => ~ ! [X3: $i] :
                                          ( ( X1 @ X3 )
                                         => ( X2 = X3 ) ) )
                             => ~ ! [X2: $i] :
                                    ~ ( X1 @ X2 ) )
                         => ( ! [X1: $i,X2: $i] :
                                ( ! [X3: $i] :
                                    ( ( in @ X3 @ X1 )
                                   => ( in @ X3 @ X2 ) )
                               => ( ! [X3: $i] :
                                      ( ( in @ X3 @ X2 )
                                     => ( in @ X3 @ X1 ) )
                                 => ( X1 = X2 ) ) )
                           => ( ! [X1: $i] :
                                  ( ! [X2: $i] :
                                      ~ ( in @ X2 @ X1 )
                                 => ( X1 = emptyset ) )
                             => ( ! [X1: $i] :
                                    ( ! [X2: $i] :
                                        ~ ( in @ X2 @ X1 )
                                   => ( X1 = emptyset ) )
                               => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                                      ( ( in @ X3 @ X1 )
                                     => ( ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) )
                                        = ( X2 @ X3 ) ) )
                                 => ( ! [X1: $i] :
                                        ( ( X1 != emptyset )
                                       => ~ ! [X2: $i] :
                                              ~ ( in @ X2 @ X1 ) )
                                   => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                                          ( ( in @ X3 @ X1 )
                                         => ( ( X2 @ X3 )
                                           => ( ( dsetconstr @ X1 @ X2 )
                                             != emptyset ) ) )
                                     => ( ! [X1: $i] :
                                            ( ~ ! [X2: $i] :
                                                  ~ ( in @ X2 @ X1 )
                                           => ( X1 != emptyset ) )
                                       => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ X2 ) )
                                         => ( ( in @ emptyset @ ( setadjoin @ emptyset @ emptyset ) )
                                           => ( ! [X1: $i,X2: $i,X3: $i] :
                                                  ( ( in @ X3 @ X2 )
                                                 => ( in @ X3 @ ( setadjoin @ X1 @ X2 ) ) )
                                             => ( ! [X1: $i,X2: $i,X3: $i] :
                                                    ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
                                                   => ! [X4: $o] :
                                                        ( ( ( X3 = X1 )
                                                         => X4 )
                                                       => ( ( ( in @ X3 @ X2 )
                                                           => X4 )
                                                         => X4 ) ) )
                                               => ( ! [X1: $i,X2: $i,X3: $i] :
                                                      ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
                                                     => ( ( X3 != X1 )
                                                       => ( in @ X3 @ X2 ) ) )
                                                 => ( ! [X1: $i] :
                                                        ( ( dsetconstr @ X1
                                                          @ ^ [X2: $i] : ~ $false )
                                                        = X1 )
                                                   => ( ! [X1: $i,X2: $i] :
                                                          ( ! [X3: $i] :
                                                              ( ( in @ X3 @ X2 )
                                                             => ( in @ X3 @ X1 ) )
                                                         => ( in @ X2 @ ( powerset @ X1 ) ) )
                                                     => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
                                                       => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
                                                         => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                ( ( in @ X2 @ ( powerset @ X1 ) )
                                                               => ( ( in @ X3 @ X2 )
                                                                 => ( in @ X3 @ X1 ) ) )
                                                           => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                  ( ( in @ X2 @ X3 )
                                                                 => ( ( in @ X3 @ X1 )
                                                                   => ( in @ X2 @ ( setunion @ X1 ) ) ) )
                                                             => ( ! [X1: $i,X2: $i] :
                                                                    ( ( in @ X2 @ ( setunion @ X1 ) )
                                                                   => ! [X3: $o] :
                                                                        ( ! [X4: $i] :
                                                                            ( ( in @ X2 @ X4 )
                                                                           => ( ( in @ X4 @ X1 )
                                                                             => X3 ) )
                                                                       => X3 ) )
                                                               => ( ! [X1: $i,X2: $i] :
                                                                      ( ( in @ X2 @ X1 )
                                                                     => ( in @ X2 @ ( powerset @ ( setunion @ X1 ) ) ) )
                                                                 => ( ! [X1: $i > $o] :
                                                                        ( ~ ! [X2: $i] :
                                                                              ( ( X1 @ X2 )
                                                                             => ~ ! [X3: $i] :
                                                                                    ( ( X1 @ X3 )
                                                                                   => ( X2 = X3 ) ) )
                                                                       => ~ ! [X2: $i] :
                                                                              ~ ! [X3: $i] :
                                                                                  ( ( X1 @ X3 )
                                                                                  = ( X3 = X2 ) ) )
                                                                   => ( ! [X1: $i] :
                                                                          ( ( X1 != emptyset )
                                                                         => ~ ! [X2: $i] :
                                                                                ~ ( in @ X2 @ X1 ) )
                                                                     => ( ! [X1: $i,X2: $i] :
                                                                            ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                                                           => ( X1 = X2 ) )
                                                                       => ( ! [X1: $i,X2: $i] :
                                                                              ( ( X1 != X2 )
                                                                             => ~ ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                                                                         => ( ! [X1: $i,X2: $i] :
                                                                                ( ( X1 = X2 )
                                                                               => ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                           => ( ! [X1: $i,X2: $i] :
                                                                                  ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                                                                 => ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                                                                             => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                                    ( ( in @ X3 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                                   => ( ( X3 != X1 )
                                                                                     => ( X3 = X2 ) ) )
                                                                               => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                                 => ( ! [X1: $i,X2: $i] : ( in @ X2 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                                   => ( ! [X1: $i,X2: $i > $o] :
                                                                                          ( ~ ! [X3: $i] :
                                                                                                ( ( in @ X3 @ X1 )
                                                                                               => ~ ( X2 @ X3 ) )
                                                                                         => ( ( dsetconstr @ X1 @ X2 )
                                                                                           != emptyset ) )
                                                                                     => ( ! [X1: $i > $o,X2: $i] :
                                                                                            ( ( in @ X2 @ emptyset )
                                                                                           => ( X1 @ X2 ) )
                                                                                       => ( ! [X1: $i,X2: $i > $o] :
                                                                                              ( ~ ! [X3: $i] :
                                                                                                    ( ( in @ X3 @ X1 )
                                                                                                   => ( X2 @ X3 ) )
                                                                                             => ~ ! [X3: $i] :
                                                                                                    ( ( in @ X3 @ X1 )
                                                                                                   => ( X2 @ X3 ) ) )
                                                                                         => ( ! [X1: $i,X2: $i > $o] :
                                                                                                ( ! [X3: $i] :
                                                                                                    ( ( in @ X3 @ X1 )
                                                                                                   => ~ ( X2 @ X3 ) )
                                                                                               => ! [X3: $i] :
                                                                                                    ( ( in @ X3 @ X1 )
                                                                                                   => ~ ( X2 @ X3 ) ) )
                                                                                           => ( ! [X1: $i,X2: $i > $o] :
                                                                                                  ( ! [X3: $i] :
                                                                                                      ( ( in @ X3 @ X1 )
                                                                                                     => ~ ( X2 @ X3 ) )
                                                                                                 => ! [X3: $i] :
                                                                                                      ( ( in @ X3 @ X1 )
                                                                                                     => ~ ( X2 @ X3 ) ) )
                                                                                             => ( ! [X1: $i,X2: $i > $o] :
                                                                                                    ( ~ ! [X3: $i] :
                                                                                                          ( ( in @ X3 @ X1 )
                                                                                                         => ( X2 @ X3 ) )
                                                                                                   => ~ ! [X3: $i] :
                                                                                                          ( ( in @ X3 @ X1 )
                                                                                                         => ( X2 @ X3 ) ) )
                                                                                               => ( ! [X1: $o] :
                                                                                                      ( X1
                                                                                                     => ( in @ emptyset @ ( prop2set @ X1 ) ) )
                                                                                                 => ( ! [X1: $o] :
                                                                                                        ( X1
                                                                                                       => ( set2prop @ ( prop2set @ X1 ) ) )
                                                                                                   => ( ! [X1: $i,X2: $i > $o] :
                                                                                                          ( ! [X3: $i] :
                                                                                                              ( ( in @ X3 @ X1 )
                                                                                                             => ~ ( X2 @ X3 ) )
                                                                                                         => ! [X3: $i] :
                                                                                                              ( ( in @ X3 @ X1 )
                                                                                                             => ~ ( X2 @ X3 ) ) )
                                                                                                     => ( ! [X1: $i,X2: $i > $o] :
                                                                                                            ( ~ ! [X3: $i] :
                                                                                                                  ( ( in @ X3 @ X1 )
                                                                                                                 => ( X2 @ X3 ) )
                                                                                                           => ~ ! [X3: $i] :
                                                                                                                  ( ( in @ X3 @ X1 )
                                                                                                                 => ( X2 @ X3 ) ) )
                                                                                                       => ( ! [X1: $i > $o] :
                                                                                                              ( ~ ! [X2: $i] :
                                                                                                                    ( ( X1 @ X2 )
                                                                                                                   => ~ ! [X3: $i] :
                                                                                                                          ( ( X1 @ X3 )
                                                                                                                         => ( X2 = X3 ) ) )
                                                                                                             => ~ ! [X2: $i] :
                                                                                                                    ( ( X1 @ X2 )
                                                                                                                   => ~ ! [X3: $i] :
                                                                                                                          ( ( X1 @ X3 )
                                                                                                                         => ( X2 = X3 ) ) ) )
                                                                                                         => ( ! [X1: $i > $o] :
                                                                                                                ( ~ ! [X2: $i] :
                                                                                                                      ~ ( X1 @ X2 )
                                                                                                               => ( ! [X2: $i,X3: $i] :
                                                                                                                      ( ( X1 @ X2 )
                                                                                                                     => ( ( X1 @ X3 )
                                                                                                                       => ( X2 = X3 ) ) )
                                                                                                                 => ~ ! [X2: $i] :
                                                                                                                        ( ( X1 @ X2 )
                                                                                                                       => ~ ! [X3: $i] :
                                                                                                                              ( ( X1 @ X3 )
                                                                                                                             => ( X2 = X3 ) ) ) ) )
                                                                                                           => ! [X1: $i > $o] :
                                                                                                                ( ~ ! [X2: $i] :
                                                                                                                      ~ ! [X3: $i] :
                                                                                                                          ( ( X1 @ X3 )
                                                                                                                          = ( X3 = X2 ) )
                                                                                                               => ~ ! [X2: $i] :
                                                                                                                      ( ( X1 @ X2 )
                                                                                                                     => ~ ! [X3: $i] :
                                                                                                                            ( ( X1 @ X3 )
                                                                                                                           => ( X2 = X3 ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ),
    introduced(assumption,[]) ).

thf(h22,assumption,
    ! [X1: $i] :
      ~ ! [X2: $i] :
          ( ~ ( ~ ( ! [X3: $i] :
                      ( ( in @ X3 @ X2 )
                     => ! [X4: $i] :
                          ( ( in @ X4 @ X3 )
                         => ( in @ X4 @ X1 ) ) )
                 => ~ ! [X3: $i,X4: $i] :
                        ( ~ ( ( in @ X3 @ X1 )
                           => ~ ( in @ X4 @ X1 ) )
                       => ( ! [X5: $i] :
                              ( ( in @ X5 @ X2 )
                             => ( ( in @ X3 @ X5 )
                                = ( in @ X4 @ X5 ) ) )
                         => ( X3 = X4 ) ) ) )
             => ~ ! [X3: $i,X4: $i] :
                    ( ~ ( ( in @ X3 @ X2 )
                       => ~ ( in @ X4 @ X2 ) )
                   => ( ~ ! [X5: $i] :
                            ( ( in @ X5 @ X3 )
                           => ( in @ X5 @ X4 ) )
                     => ! [X5: $i] :
                          ( ( in @ X5 @ X4 )
                         => ( in @ X5 @ X3 ) ) ) ) )
         => ~ ! [X3: $i] :
                ( ~ ( ! [X4: $i] :
                        ( ( in @ X4 @ X3 )
                       => ( in @ X4 @ X1 ) )
                   => ! [X4: $i] :
                        ~ ( in @ X4 @ X3 ) )
               => ~ ! [X4: $i,X5: $i] :
                      ( ~ ( ~ ( ( in @ X4 @ X2 )
                             => ~ ( in @ X5 @ X3 ) )
                         => ~ ! [X6: $i] :
                                ( ( in @ X6 @ X4 )
                               => ~ ( in @ X6 @ X3 ) ) )
                     => ~ ! [X6: $i] :
                            ( ( in @ X6 @ X2 )
                           => ( ~ ! [X7: $i] :
                                    ( ( in @ X7 @ X6 )
                                   => ( in @ X7 @ X4 ) )
                             => ( in @ X5 @ X6 ) ) ) ) ) ),
    introduced(assumption,[]) ).

thf(h23,assumption,
    ~ ( ! [X1: $i > $o] :
          ( ~ ! [X2: $i] :
                ( ( X1 @ X2 )
               => ~ ! [X3: $i] :
                      ( ( X1 @ X3 )
                     => ( X2 = X3 ) ) )
         => ( X1 @ ( descr @ X1 ) ) )
     => ( ! [X1: $i,X2: $i > $o,X3: $i] :
            ( ( in @ X3 @ X1 )
           => ( ( X2 @ X3 )
             => ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) ) ) )
       => ( ! [X1: $i,X2: $i > $o,X3: $i] :
              ( ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) )
             => ( in @ X3 @ X1 ) )
         => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                ( ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) )
               => ( X2 @ X3 ) )
           => ( ! [X1: $i > $o] :
                  ( ~ ! [X2: $i] :
                        ( ( X1 @ X2 )
                       => ~ ! [X3: $i] :
                              ( ( X1 @ X3 )
                             => ( X2 = X3 ) ) )
                 => ~ ! [X2: $i] :
                        ( ( X1 @ X2 )
                       => ~ ! [X3: $i] :
                              ( ( X1 @ X3 )
                             => ( X2 = X3 ) ) ) )
             => ( ! [X1: $o,X2: $i] :
                    ( ( in @ X2 @ ( prop2set @ X1 ) )
                   => X1 )
               => ( ! [X1: $i] :
                      ( ( in @ X1 @ emptyset )
                     => ! [X2: $o] : X2 )
                 => ( ! [X1: $i] :
                        ~ ( in @ X1 @ emptyset )
                   => ( ! [X1: $i] :
                          ~ ( in @ X1 @ emptyset )
                     => ( ! [X1: $i > $o] :
                            ( ~ ! [X2: $i] :
                                  ( ( X1 @ X2 )
                                 => ~ ! [X3: $i] :
                                        ( ( X1 @ X3 )
                                       => ( X2 = X3 ) ) )
                           => ~ ! [X2: $i] :
                                  ~ ( X1 @ X2 ) )
                       => ( ! [X1: $i,X2: $i] :
                              ( ! [X3: $i] :
                                  ( ( in @ X3 @ X1 )
                                 => ( in @ X3 @ X2 ) )
                             => ( ! [X3: $i] :
                                    ( ( in @ X3 @ X2 )
                                   => ( in @ X3 @ X1 ) )
                               => ( X1 = X2 ) ) )
                         => ( ! [X1: $i] :
                                ( ! [X2: $i] :
                                    ~ ( in @ X2 @ X1 )
                               => ( X1 = emptyset ) )
                           => ( ! [X1: $i] :
                                  ( ! [X2: $i] :
                                      ~ ( in @ X2 @ X1 )
                                 => ( X1 = emptyset ) )
                             => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                                    ( ( in @ X3 @ X1 )
                                   => ( ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) )
                                      = ( X2 @ X3 ) ) )
                               => ( ! [X1: $i] :
                                      ( ( X1 != emptyset )
                                     => ~ ! [X2: $i] :
                                            ~ ( in @ X2 @ X1 ) )
                                 => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                                        ( ( in @ X3 @ X1 )
                                       => ( ( X2 @ X3 )
                                         => ( ( dsetconstr @ X1 @ X2 )
                                           != emptyset ) ) )
                                   => ( ! [X1: $i] :
                                          ( ~ ! [X2: $i] :
                                                ~ ( in @ X2 @ X1 )
                                         => ( X1 != emptyset ) )
                                     => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ X2 ) )
                                       => ( ( in @ emptyset @ ( setadjoin @ emptyset @ emptyset ) )
                                         => ( ! [X1: $i,X2: $i,X3: $i] :
                                                ( ( in @ X3 @ X2 )
                                               => ( in @ X3 @ ( setadjoin @ X1 @ X2 ) ) )
                                           => ( ! [X1: $i,X2: $i,X3: $i] :
                                                  ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
                                                 => ! [X4: $o] :
                                                      ( ( ( X3 = X1 )
                                                       => X4 )
                                                     => ( ( ( in @ X3 @ X2 )
                                                         => X4 )
                                                       => X4 ) ) )
                                             => ( ! [X1: $i,X2: $i,X3: $i] :
                                                    ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
                                                   => ( ( X3 != X1 )
                                                     => ( in @ X3 @ X2 ) ) )
                                               => ( ! [X1: $i] :
                                                      ( ( dsetconstr @ X1
                                                        @ ^ [X2: $i] : ~ $false )
                                                      = X1 )
                                                 => ( ! [X1: $i,X2: $i] :
                                                        ( ! [X3: $i] :
                                                            ( ( in @ X3 @ X2 )
                                                           => ( in @ X3 @ X1 ) )
                                                       => ( in @ X2 @ ( powerset @ X1 ) ) )
                                                   => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
                                                     => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
                                                       => ( ! [X1: $i,X2: $i,X3: $i] :
                                                              ( ( in @ X2 @ ( powerset @ X1 ) )
                                                             => ( ( in @ X3 @ X2 )
                                                               => ( in @ X3 @ X1 ) ) )
                                                         => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                ( ( in @ X2 @ X3 )
                                                               => ( ( in @ X3 @ X1 )
                                                                 => ( in @ X2 @ ( setunion @ X1 ) ) ) )
                                                           => ( ! [X1: $i,X2: $i] :
                                                                  ( ( in @ X2 @ ( setunion @ X1 ) )
                                                                 => ! [X3: $o] :
                                                                      ( ! [X4: $i] :
                                                                          ( ( in @ X2 @ X4 )
                                                                         => ( ( in @ X4 @ X1 )
                                                                           => X3 ) )
                                                                     => X3 ) )
                                                             => ( ! [X1: $i,X2: $i] :
                                                                    ( ( in @ X2 @ X1 )
                                                                   => ( in @ X2 @ ( powerset @ ( setunion @ X1 ) ) ) )
                                                               => ( ! [X1: $i > $o] :
                                                                      ( ~ ! [X2: $i] :
                                                                            ( ( X1 @ X2 )
                                                                           => ~ ! [X3: $i] :
                                                                                  ( ( X1 @ X3 )
                                                                                 => ( X2 = X3 ) ) )
                                                                     => ~ ! [X2: $i] :
                                                                            ~ ! [X3: $i] :
                                                                                ( ( X1 @ X3 )
                                                                                = ( X3 = X2 ) ) )
                                                                 => ( ! [X1: $i] :
                                                                        ( ( X1 != emptyset )
                                                                       => ~ ! [X2: $i] :
                                                                              ~ ( in @ X2 @ X1 ) )
                                                                   => ( ! [X1: $i,X2: $i] :
                                                                          ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                                                         => ( X1 = X2 ) )
                                                                     => ( ! [X1: $i,X2: $i] :
                                                                            ( ( X1 != X2 )
                                                                           => ~ ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                                                                       => ( ! [X1: $i,X2: $i] :
                                                                              ( ( X1 = X2 )
                                                                             => ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                         => ( ! [X1: $i,X2: $i] :
                                                                                ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                                                               => ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                                                                           => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                                  ( ( in @ X3 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                                 => ( ( X3 != X1 )
                                                                                   => ( X3 = X2 ) ) )
                                                                             => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                               => ( ! [X1: $i,X2: $i] : ( in @ X2 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                                 => ( ! [X1: $i,X2: $i > $o] :
                                                                                        ( ~ ! [X3: $i] :
                                                                                              ( ( in @ X3 @ X1 )
                                                                                             => ~ ( X2 @ X3 ) )
                                                                                       => ( ( dsetconstr @ X1 @ X2 )
                                                                                         != emptyset ) )
                                                                                   => ( ! [X1: $i > $o,X2: $i] :
                                                                                          ( ( in @ X2 @ emptyset )
                                                                                         => ( X1 @ X2 ) )
                                                                                     => ( ! [X1: $i,X2: $i > $o] :
                                                                                            ( ~ ! [X3: $i] :
                                                                                                  ( ( in @ X3 @ X1 )
                                                                                                 => ( X2 @ X3 ) )
                                                                                           => ~ ! [X3: $i] :
                                                                                                  ( ( in @ X3 @ X1 )
                                                                                                 => ( X2 @ X3 ) ) )
                                                                                       => ( ! [X1: $i,X2: $i > $o] :
                                                                                              ( ! [X3: $i] :
                                                                                                  ( ( in @ X3 @ X1 )
                                                                                                 => ~ ( X2 @ X3 ) )
                                                                                             => ! [X3: $i] :
                                                                                                  ( ( in @ X3 @ X1 )
                                                                                                 => ~ ( X2 @ X3 ) ) )
                                                                                         => ( ! [X1: $i,X2: $i > $o] :
                                                                                                ( ! [X3: $i] :
                                                                                                    ( ( in @ X3 @ X1 )
                                                                                                   => ~ ( X2 @ X3 ) )
                                                                                               => ! [X3: $i] :
                                                                                                    ( ( in @ X3 @ X1 )
                                                                                                   => ~ ( X2 @ X3 ) ) )
                                                                                           => ( ! [X1: $i,X2: $i > $o] :
                                                                                                  ( ~ ! [X3: $i] :
                                                                                                        ( ( in @ X3 @ X1 )
                                                                                                       => ( X2 @ X3 ) )
                                                                                                 => ~ ! [X3: $i] :
                                                                                                        ( ( in @ X3 @ X1 )
                                                                                                       => ( X2 @ X3 ) ) )
                                                                                             => ( ! [X1: $o] :
                                                                                                    ( X1
                                                                                                   => ( in @ emptyset @ ( prop2set @ X1 ) ) )
                                                                                               => ( ! [X1: $o] :
                                                                                                      ( X1
                                                                                                     => ( set2prop @ ( prop2set @ X1 ) ) )
                                                                                                 => ( ! [X1: $i,X2: $i > $o] :
                                                                                                        ( ! [X3: $i] :
                                                                                                            ( ( in @ X3 @ X1 )
                                                                                                           => ~ ( X2 @ X3 ) )
                                                                                                       => ! [X3: $i] :
                                                                                                            ( ( in @ X3 @ X1 )
                                                                                                           => ~ ( X2 @ X3 ) ) )
                                                                                                   => ( ! [X1: $i,X2: $i > $o] :
                                                                                                          ( ~ ! [X3: $i] :
                                                                                                                ( ( in @ X3 @ X1 )
                                                                                                               => ( X2 @ X3 ) )
                                                                                                         => ~ ! [X3: $i] :
                                                                                                                ( ( in @ X3 @ X1 )
                                                                                                               => ( X2 @ X3 ) ) )
                                                                                                     => ( ! [X1: $i > $o] :
                                                                                                            ( ~ ! [X2: $i] :
                                                                                                                  ( ( X1 @ X2 )
                                                                                                                 => ~ ! [X3: $i] :
                                                                                                                        ( ( X1 @ X3 )
                                                                                                                       => ( X2 = X3 ) ) )
                                                                                                           => ~ ! [X2: $i] :
                                                                                                                  ( ( X1 @ X2 )
                                                                                                                 => ~ ! [X3: $i] :
                                                                                                                        ( ( X1 @ X3 )
                                                                                                                       => ( X2 = X3 ) ) ) )
                                                                                                       => ( ! [X1: $i > $o] :
                                                                                                              ( ~ ! [X2: $i] :
                                                                                                                    ~ ( X1 @ X2 )
                                                                                                             => ( ! [X2: $i,X3: $i] :
                                                                                                                    ( ( X1 @ X2 )
                                                                                                                   => ( ( X1 @ X3 )
                                                                                                                     => ( X2 = X3 ) ) )
                                                                                                               => ~ ! [X2: $i] :
                                                                                                                      ( ( X1 @ X2 )
                                                                                                                     => ~ ! [X3: $i] :
                                                                                                                            ( ( X1 @ X3 )
                                                                                                                           => ( X2 = X3 ) ) ) ) )
                                                                                                         => ! [X1: $i > $o] :
                                                                                                              ( ~ ! [X2: $i] :
                                                                                                                    ~ ! [X3: $i] :
                                                                                                                        ( ( X1 @ X3 )
                                                                                                                        = ( X3 = X2 ) )
                                                                                                             => ~ ! [X2: $i] :
                                                                                                                    ( ( X1 @ X2 )
                                                                                                                   => ~ ! [X3: $i] :
                                                                                                                          ( ( X1 @ X3 )
                                                                                                                         => ( X2 = X3 ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ),
    introduced(assumption,[]) ).

thf(h24,assumption,
    ! [X1: $i > $o] :
      ( ~ ! [X2: $i] :
            ( ( X1 @ X2 )
           => ~ ! [X3: $i] :
                  ( ( X1 @ X3 )
                 => ( X2 = X3 ) ) )
     => ( X1 @ ( descr @ X1 ) ) ),
    introduced(assumption,[]) ).

thf(h25,assumption,
    ~ ( ! [X1: $i,X2: $i > $o,X3: $i] :
          ( ( in @ X3 @ X1 )
         => ( ( X2 @ X3 )
           => ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) ) ) )
     => ( ! [X1: $i,X2: $i > $o,X3: $i] :
            ( ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) )
           => ( in @ X3 @ X1 ) )
       => ( ! [X1: $i,X2: $i > $o,X3: $i] :
              ( ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) )
             => ( X2 @ X3 ) )
         => ( ! [X1: $i > $o] :
                ( ~ ! [X2: $i] :
                      ( ( X1 @ X2 )
                     => ~ ! [X3: $i] :
                            ( ( X1 @ X3 )
                           => ( X2 = X3 ) ) )
               => ~ ! [X2: $i] :
                      ( ( X1 @ X2 )
                     => ~ ! [X3: $i] :
                            ( ( X1 @ X3 )
                           => ( X2 = X3 ) ) ) )
           => ( ! [X1: $o,X2: $i] :
                  ( ( in @ X2 @ ( prop2set @ X1 ) )
                 => X1 )
             => ( ! [X1: $i] :
                    ( ( in @ X1 @ emptyset )
                   => ! [X2: $o] : X2 )
               => ( ! [X1: $i] :
                      ~ ( in @ X1 @ emptyset )
                 => ( ! [X1: $i] :
                        ~ ( in @ X1 @ emptyset )
                   => ( ! [X1: $i > $o] :
                          ( ~ ! [X2: $i] :
                                ( ( X1 @ X2 )
                               => ~ ! [X3: $i] :
                                      ( ( X1 @ X3 )
                                     => ( X2 = X3 ) ) )
                         => ~ ! [X2: $i] :
                                ~ ( X1 @ X2 ) )
                     => ( ! [X1: $i,X2: $i] :
                            ( ! [X3: $i] :
                                ( ( in @ X3 @ X1 )
                               => ( in @ X3 @ X2 ) )
                           => ( ! [X3: $i] :
                                  ( ( in @ X3 @ X2 )
                                 => ( in @ X3 @ X1 ) )
                             => ( X1 = X2 ) ) )
                       => ( ! [X1: $i] :
                              ( ! [X2: $i] :
                                  ~ ( in @ X2 @ X1 )
                             => ( X1 = emptyset ) )
                         => ( ! [X1: $i] :
                                ( ! [X2: $i] :
                                    ~ ( in @ X2 @ X1 )
                               => ( X1 = emptyset ) )
                           => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                                  ( ( in @ X3 @ X1 )
                                 => ( ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) )
                                    = ( X2 @ X3 ) ) )
                             => ( ! [X1: $i] :
                                    ( ( X1 != emptyset )
                                   => ~ ! [X2: $i] :
                                          ~ ( in @ X2 @ X1 ) )
                               => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                                      ( ( in @ X3 @ X1 )
                                     => ( ( X2 @ X3 )
                                       => ( ( dsetconstr @ X1 @ X2 )
                                         != emptyset ) ) )
                                 => ( ! [X1: $i] :
                                        ( ~ ! [X2: $i] :
                                              ~ ( in @ X2 @ X1 )
                                       => ( X1 != emptyset ) )
                                   => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ X2 ) )
                                     => ( ( in @ emptyset @ ( setadjoin @ emptyset @ emptyset ) )
                                       => ( ! [X1: $i,X2: $i,X3: $i] :
                                              ( ( in @ X3 @ X2 )
                                             => ( in @ X3 @ ( setadjoin @ X1 @ X2 ) ) )
                                         => ( ! [X1: $i,X2: $i,X3: $i] :
                                                ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
                                               => ! [X4: $o] :
                                                    ( ( ( X3 = X1 )
                                                     => X4 )
                                                   => ( ( ( in @ X3 @ X2 )
                                                       => X4 )
                                                     => X4 ) ) )
                                           => ( ! [X1: $i,X2: $i,X3: $i] :
                                                  ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
                                                 => ( ( X3 != X1 )
                                                   => ( in @ X3 @ X2 ) ) )
                                             => ( ! [X1: $i] :
                                                    ( ( dsetconstr @ X1
                                                      @ ^ [X2: $i] : ~ $false )
                                                    = X1 )
                                               => ( ! [X1: $i,X2: $i] :
                                                      ( ! [X3: $i] :
                                                          ( ( in @ X3 @ X2 )
                                                         => ( in @ X3 @ X1 ) )
                                                     => ( in @ X2 @ ( powerset @ X1 ) ) )
                                                 => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
                                                   => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
                                                     => ( ! [X1: $i,X2: $i,X3: $i] :
                                                            ( ( in @ X2 @ ( powerset @ X1 ) )
                                                           => ( ( in @ X3 @ X2 )
                                                             => ( in @ X3 @ X1 ) ) )
                                                       => ( ! [X1: $i,X2: $i,X3: $i] :
                                                              ( ( in @ X2 @ X3 )
                                                             => ( ( in @ X3 @ X1 )
                                                               => ( in @ X2 @ ( setunion @ X1 ) ) ) )
                                                         => ( ! [X1: $i,X2: $i] :
                                                                ( ( in @ X2 @ ( setunion @ X1 ) )
                                                               => ! [X3: $o] :
                                                                    ( ! [X4: $i] :
                                                                        ( ( in @ X2 @ X4 )
                                                                       => ( ( in @ X4 @ X1 )
                                                                         => X3 ) )
                                                                   => X3 ) )
                                                           => ( ! [X1: $i,X2: $i] :
                                                                  ( ( in @ X2 @ X1 )
                                                                 => ( in @ X2 @ ( powerset @ ( setunion @ X1 ) ) ) )
                                                             => ( ! [X1: $i > $o] :
                                                                    ( ~ ! [X2: $i] :
                                                                          ( ( X1 @ X2 )
                                                                         => ~ ! [X3: $i] :
                                                                                ( ( X1 @ X3 )
                                                                               => ( X2 = X3 ) ) )
                                                                   => ~ ! [X2: $i] :
                                                                          ~ ! [X3: $i] :
                                                                              ( ( X1 @ X3 )
                                                                              = ( X3 = X2 ) ) )
                                                               => ( ! [X1: $i] :
                                                                      ( ( X1 != emptyset )
                                                                     => ~ ! [X2: $i] :
                                                                            ~ ( in @ X2 @ X1 ) )
                                                                 => ( ! [X1: $i,X2: $i] :
                                                                        ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                                                       => ( X1 = X2 ) )
                                                                   => ( ! [X1: $i,X2: $i] :
                                                                          ( ( X1 != X2 )
                                                                         => ~ ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                                                                     => ( ! [X1: $i,X2: $i] :
                                                                            ( ( X1 = X2 )
                                                                           => ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                       => ( ! [X1: $i,X2: $i] :
                                                                              ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                                                             => ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                                                                         => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                                ( ( in @ X3 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                               => ( ( X3 != X1 )
                                                                                 => ( X3 = X2 ) ) )
                                                                           => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                             => ( ! [X1: $i,X2: $i] : ( in @ X2 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                               => ( ! [X1: $i,X2: $i > $o] :
                                                                                      ( ~ ! [X3: $i] :
                                                                                            ( ( in @ X3 @ X1 )
                                                                                           => ~ ( X2 @ X3 ) )
                                                                                     => ( ( dsetconstr @ X1 @ X2 )
                                                                                       != emptyset ) )
                                                                                 => ( ! [X1: $i > $o,X2: $i] :
                                                                                        ( ( in @ X2 @ emptyset )
                                                                                       => ( X1 @ X2 ) )
                                                                                   => ( ! [X1: $i,X2: $i > $o] :
                                                                                          ( ~ ! [X3: $i] :
                                                                                                ( ( in @ X3 @ X1 )
                                                                                               => ( X2 @ X3 ) )
                                                                                         => ~ ! [X3: $i] :
                                                                                                ( ( in @ X3 @ X1 )
                                                                                               => ( X2 @ X3 ) ) )
                                                                                     => ( ! [X1: $i,X2: $i > $o] :
                                                                                            ( ! [X3: $i] :
                                                                                                ( ( in @ X3 @ X1 )
                                                                                               => ~ ( X2 @ X3 ) )
                                                                                           => ! [X3: $i] :
                                                                                                ( ( in @ X3 @ X1 )
                                                                                               => ~ ( X2 @ X3 ) ) )
                                                                                       => ( ! [X1: $i,X2: $i > $o] :
                                                                                              ( ! [X3: $i] :
                                                                                                  ( ( in @ X3 @ X1 )
                                                                                                 => ~ ( X2 @ X3 ) )
                                                                                             => ! [X3: $i] :
                                                                                                  ( ( in @ X3 @ X1 )
                                                                                                 => ~ ( X2 @ X3 ) ) )
                                                                                         => ( ! [X1: $i,X2: $i > $o] :
                                                                                                ( ~ ! [X3: $i] :
                                                                                                      ( ( in @ X3 @ X1 )
                                                                                                     => ( X2 @ X3 ) )
                                                                                               => ~ ! [X3: $i] :
                                                                                                      ( ( in @ X3 @ X1 )
                                                                                                     => ( X2 @ X3 ) ) )
                                                                                           => ( ! [X1: $o] :
                                                                                                  ( X1
                                                                                                 => ( in @ emptyset @ ( prop2set @ X1 ) ) )
                                                                                             => ( ! [X1: $o] :
                                                                                                    ( X1
                                                                                                   => ( set2prop @ ( prop2set @ X1 ) ) )
                                                                                               => ( ! [X1: $i,X2: $i > $o] :
                                                                                                      ( ! [X3: $i] :
                                                                                                          ( ( in @ X3 @ X1 )
                                                                                                         => ~ ( X2 @ X3 ) )
                                                                                                     => ! [X3: $i] :
                                                                                                          ( ( in @ X3 @ X1 )
                                                                                                         => ~ ( X2 @ X3 ) ) )
                                                                                                 => ( ! [X1: $i,X2: $i > $o] :
                                                                                                        ( ~ ! [X3: $i] :
                                                                                                              ( ( in @ X3 @ X1 )
                                                                                                             => ( X2 @ X3 ) )
                                                                                                       => ~ ! [X3: $i] :
                                                                                                              ( ( in @ X3 @ X1 )
                                                                                                             => ( X2 @ X3 ) ) )
                                                                                                   => ( ! [X1: $i > $o] :
                                                                                                          ( ~ ! [X2: $i] :
                                                                                                                ( ( X1 @ X2 )
                                                                                                               => ~ ! [X3: $i] :
                                                                                                                      ( ( X1 @ X3 )
                                                                                                                     => ( X2 = X3 ) ) )
                                                                                                         => ~ ! [X2: $i] :
                                                                                                                ( ( X1 @ X2 )
                                                                                                               => ~ ! [X3: $i] :
                                                                                                                      ( ( X1 @ X3 )
                                                                                                                     => ( X2 = X3 ) ) ) )
                                                                                                     => ( ! [X1: $i > $o] :
                                                                                                            ( ~ ! [X2: $i] :
                                                                                                                  ~ ( X1 @ X2 )
                                                                                                           => ( ! [X2: $i,X3: $i] :
                                                                                                                  ( ( X1 @ X2 )
                                                                                                                 => ( ( X1 @ X3 )
                                                                                                                   => ( X2 = X3 ) ) )
                                                                                                             => ~ ! [X2: $i] :
                                                                                                                    ( ( X1 @ X2 )
                                                                                                                   => ~ ! [X3: $i] :
                                                                                                                          ( ( X1 @ X3 )
                                                                                                                         => ( X2 = X3 ) ) ) ) )
                                                                                                       => ! [X1: $i > $o] :
                                                                                                            ( ~ ! [X2: $i] :
                                                                                                                  ~ ! [X3: $i] :
                                                                                                                      ( ( X1 @ X3 )
                                                                                                                      = ( X3 = X2 ) )
                                                                                                           => ~ ! [X2: $i] :
                                                                                                                  ( ( X1 @ X2 )
                                                                                                                 => ~ ! [X3: $i] :
                                                                                                                        ( ( X1 @ X3 )
                                                                                                                       => ( X2 = X3 ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ),
    introduced(assumption,[]) ).

thf(h26,assumption,
    ! [X1: $i,X2: $i > $o,X3: $i] :
      ( ( in @ X3 @ X1 )
     => ( ( X2 @ X3 )
       => ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) ) ) ),
    introduced(assumption,[]) ).

thf(h27,assumption,
    ~ ( ! [X1: $i,X2: $i > $o,X3: $i] :
          ( ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) )
         => ( in @ X3 @ X1 ) )
     => ( ! [X1: $i,X2: $i > $o,X3: $i] :
            ( ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) )
           => ( X2 @ X3 ) )
       => ( ! [X1: $i > $o] :
              ( ~ ! [X2: $i] :
                    ( ( X1 @ X2 )
                   => ~ ! [X3: $i] :
                          ( ( X1 @ X3 )
                         => ( X2 = X3 ) ) )
             => ~ ! [X2: $i] :
                    ( ( X1 @ X2 )
                   => ~ ! [X3: $i] :
                          ( ( X1 @ X3 )
                         => ( X2 = X3 ) ) ) )
         => ( ! [X1: $o,X2: $i] :
                ( ( in @ X2 @ ( prop2set @ X1 ) )
               => X1 )
           => ( ! [X1: $i] :
                  ( ( in @ X1 @ emptyset )
                 => ! [X2: $o] : X2 )
             => ( ! [X1: $i] :
                    ~ ( in @ X1 @ emptyset )
               => ( ! [X1: $i] :
                      ~ ( in @ X1 @ emptyset )
                 => ( ! [X1: $i > $o] :
                        ( ~ ! [X2: $i] :
                              ( ( X1 @ X2 )
                             => ~ ! [X3: $i] :
                                    ( ( X1 @ X3 )
                                   => ( X2 = X3 ) ) )
                       => ~ ! [X2: $i] :
                              ~ ( X1 @ X2 ) )
                   => ( ! [X1: $i,X2: $i] :
                          ( ! [X3: $i] :
                              ( ( in @ X3 @ X1 )
                             => ( in @ X3 @ X2 ) )
                         => ( ! [X3: $i] :
                                ( ( in @ X3 @ X2 )
                               => ( in @ X3 @ X1 ) )
                           => ( X1 = X2 ) ) )
                     => ( ! [X1: $i] :
                            ( ! [X2: $i] :
                                ~ ( in @ X2 @ X1 )
                           => ( X1 = emptyset ) )
                       => ( ! [X1: $i] :
                              ( ! [X2: $i] :
                                  ~ ( in @ X2 @ X1 )
                             => ( X1 = emptyset ) )
                         => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                                ( ( in @ X3 @ X1 )
                               => ( ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) )
                                  = ( X2 @ X3 ) ) )
                           => ( ! [X1: $i] :
                                  ( ( X1 != emptyset )
                                 => ~ ! [X2: $i] :
                                        ~ ( in @ X2 @ X1 ) )
                             => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                                    ( ( in @ X3 @ X1 )
                                   => ( ( X2 @ X3 )
                                     => ( ( dsetconstr @ X1 @ X2 )
                                       != emptyset ) ) )
                               => ( ! [X1: $i] :
                                      ( ~ ! [X2: $i] :
                                            ~ ( in @ X2 @ X1 )
                                     => ( X1 != emptyset ) )
                                 => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ X2 ) )
                                   => ( ( in @ emptyset @ ( setadjoin @ emptyset @ emptyset ) )
                                     => ( ! [X1: $i,X2: $i,X3: $i] :
                                            ( ( in @ X3 @ X2 )
                                           => ( in @ X3 @ ( setadjoin @ X1 @ X2 ) ) )
                                       => ( ! [X1: $i,X2: $i,X3: $i] :
                                              ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
                                             => ! [X4: $o] :
                                                  ( ( ( X3 = X1 )
                                                   => X4 )
                                                 => ( ( ( in @ X3 @ X2 )
                                                     => X4 )
                                                   => X4 ) ) )
                                         => ( ! [X1: $i,X2: $i,X3: $i] :
                                                ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
                                               => ( ( X3 != X1 )
                                                 => ( in @ X3 @ X2 ) ) )
                                           => ( ! [X1: $i] :
                                                  ( ( dsetconstr @ X1
                                                    @ ^ [X2: $i] : ~ $false )
                                                  = X1 )
                                             => ( ! [X1: $i,X2: $i] :
                                                    ( ! [X3: $i] :
                                                        ( ( in @ X3 @ X2 )
                                                       => ( in @ X3 @ X1 ) )
                                                   => ( in @ X2 @ ( powerset @ X1 ) ) )
                                               => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
                                                 => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
                                                   => ( ! [X1: $i,X2: $i,X3: $i] :
                                                          ( ( in @ X2 @ ( powerset @ X1 ) )
                                                         => ( ( in @ X3 @ X2 )
                                                           => ( in @ X3 @ X1 ) ) )
                                                     => ( ! [X1: $i,X2: $i,X3: $i] :
                                                            ( ( in @ X2 @ X3 )
                                                           => ( ( in @ X3 @ X1 )
                                                             => ( in @ X2 @ ( setunion @ X1 ) ) ) )
                                                       => ( ! [X1: $i,X2: $i] :
                                                              ( ( in @ X2 @ ( setunion @ X1 ) )
                                                             => ! [X3: $o] :
                                                                  ( ! [X4: $i] :
                                                                      ( ( in @ X2 @ X4 )
                                                                     => ( ( in @ X4 @ X1 )
                                                                       => X3 ) )
                                                                 => X3 ) )
                                                         => ( ! [X1: $i,X2: $i] :
                                                                ( ( in @ X2 @ X1 )
                                                               => ( in @ X2 @ ( powerset @ ( setunion @ X1 ) ) ) )
                                                           => ( ! [X1: $i > $o] :
                                                                  ( ~ ! [X2: $i] :
                                                                        ( ( X1 @ X2 )
                                                                       => ~ ! [X3: $i] :
                                                                              ( ( X1 @ X3 )
                                                                             => ( X2 = X3 ) ) )
                                                                 => ~ ! [X2: $i] :
                                                                        ~ ! [X3: $i] :
                                                                            ( ( X1 @ X3 )
                                                                            = ( X3 = X2 ) ) )
                                                             => ( ! [X1: $i] :
                                                                    ( ( X1 != emptyset )
                                                                   => ~ ! [X2: $i] :
                                                                          ~ ( in @ X2 @ X1 ) )
                                                               => ( ! [X1: $i,X2: $i] :
                                                                      ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                                                     => ( X1 = X2 ) )
                                                                 => ( ! [X1: $i,X2: $i] :
                                                                        ( ( X1 != X2 )
                                                                       => ~ ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                                                                   => ( ! [X1: $i,X2: $i] :
                                                                          ( ( X1 = X2 )
                                                                         => ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                     => ( ! [X1: $i,X2: $i] :
                                                                            ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                                                           => ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                                                                       => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                              ( ( in @ X3 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                             => ( ( X3 != X1 )
                                                                               => ( X3 = X2 ) ) )
                                                                         => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                           => ( ! [X1: $i,X2: $i] : ( in @ X2 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                             => ( ! [X1: $i,X2: $i > $o] :
                                                                                    ( ~ ! [X3: $i] :
                                                                                          ( ( in @ X3 @ X1 )
                                                                                         => ~ ( X2 @ X3 ) )
                                                                                   => ( ( dsetconstr @ X1 @ X2 )
                                                                                     != emptyset ) )
                                                                               => ( ! [X1: $i > $o,X2: $i] :
                                                                                      ( ( in @ X2 @ emptyset )
                                                                                     => ( X1 @ X2 ) )
                                                                                 => ( ! [X1: $i,X2: $i > $o] :
                                                                                        ( ~ ! [X3: $i] :
                                                                                              ( ( in @ X3 @ X1 )
                                                                                             => ( X2 @ X3 ) )
                                                                                       => ~ ! [X3: $i] :
                                                                                              ( ( in @ X3 @ X1 )
                                                                                             => ( X2 @ X3 ) ) )
                                                                                   => ( ! [X1: $i,X2: $i > $o] :
                                                                                          ( ! [X3: $i] :
                                                                                              ( ( in @ X3 @ X1 )
                                                                                             => ~ ( X2 @ X3 ) )
                                                                                         => ! [X3: $i] :
                                                                                              ( ( in @ X3 @ X1 )
                                                                                             => ~ ( X2 @ X3 ) ) )
                                                                                     => ( ! [X1: $i,X2: $i > $o] :
                                                                                            ( ! [X3: $i] :
                                                                                                ( ( in @ X3 @ X1 )
                                                                                               => ~ ( X2 @ X3 ) )
                                                                                           => ! [X3: $i] :
                                                                                                ( ( in @ X3 @ X1 )
                                                                                               => ~ ( X2 @ X3 ) ) )
                                                                                       => ( ! [X1: $i,X2: $i > $o] :
                                                                                              ( ~ ! [X3: $i] :
                                                                                                    ( ( in @ X3 @ X1 )
                                                                                                   => ( X2 @ X3 ) )
                                                                                             => ~ ! [X3: $i] :
                                                                                                    ( ( in @ X3 @ X1 )
                                                                                                   => ( X2 @ X3 ) ) )
                                                                                         => ( ! [X1: $o] :
                                                                                                ( X1
                                                                                               => ( in @ emptyset @ ( prop2set @ X1 ) ) )
                                                                                           => ( ! [X1: $o] :
                                                                                                  ( X1
                                                                                                 => ( set2prop @ ( prop2set @ X1 ) ) )
                                                                                             => ( ! [X1: $i,X2: $i > $o] :
                                                                                                    ( ! [X3: $i] :
                                                                                                        ( ( in @ X3 @ X1 )
                                                                                                       => ~ ( X2 @ X3 ) )
                                                                                                   => ! [X3: $i] :
                                                                                                        ( ( in @ X3 @ X1 )
                                                                                                       => ~ ( X2 @ X3 ) ) )
                                                                                               => ( ! [X1: $i,X2: $i > $o] :
                                                                                                      ( ~ ! [X3: $i] :
                                                                                                            ( ( in @ X3 @ X1 )
                                                                                                           => ( X2 @ X3 ) )
                                                                                                     => ~ ! [X3: $i] :
                                                                                                            ( ( in @ X3 @ X1 )
                                                                                                           => ( X2 @ X3 ) ) )
                                                                                                 => ( ! [X1: $i > $o] :
                                                                                                        ( ~ ! [X2: $i] :
                                                                                                              ( ( X1 @ X2 )
                                                                                                             => ~ ! [X3: $i] :
                                                                                                                    ( ( X1 @ X3 )
                                                                                                                   => ( X2 = X3 ) ) )
                                                                                                       => ~ ! [X2: $i] :
                                                                                                              ( ( X1 @ X2 )
                                                                                                             => ~ ! [X3: $i] :
                                                                                                                    ( ( X1 @ X3 )
                                                                                                                   => ( X2 = X3 ) ) ) )
                                                                                                   => ( ! [X1: $i > $o] :
                                                                                                          ( ~ ! [X2: $i] :
                                                                                                                ~ ( X1 @ X2 )
                                                                                                         => ( ! [X2: $i,X3: $i] :
                                                                                                                ( ( X1 @ X2 )
                                                                                                               => ( ( X1 @ X3 )
                                                                                                                 => ( X2 = X3 ) ) )
                                                                                                           => ~ ! [X2: $i] :
                                                                                                                  ( ( X1 @ X2 )
                                                                                                                 => ~ ! [X3: $i] :
                                                                                                                        ( ( X1 @ X3 )
                                                                                                                       => ( X2 = X3 ) ) ) ) )
                                                                                                     => ! [X1: $i > $o] :
                                                                                                          ( ~ ! [X2: $i] :
                                                                                                                ~ ! [X3: $i] :
                                                                                                                    ( ( X1 @ X3 )
                                                                                                                    = ( X3 = X2 ) )
                                                                                                         => ~ ! [X2: $i] :
                                                                                                                ( ( X1 @ X2 )
                                                                                                               => ~ ! [X3: $i] :
                                                                                                                      ( ( X1 @ X3 )
                                                                                                                     => ( X2 = X3 ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ),
    introduced(assumption,[]) ).

thf(h28,assumption,
    ! [X1: $i,X2: $i > $o,X3: $i] :
      ( ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) )
     => ( in @ X3 @ X1 ) ),
    introduced(assumption,[]) ).

thf(h29,assumption,
    ~ ( ! [X1: $i,X2: $i > $o,X3: $i] :
          ( ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) )
         => ( X2 @ X3 ) )
     => ( ! [X1: $i > $o] :
            ( ~ ! [X2: $i] :
                  ( ( X1 @ X2 )
                 => ~ ! [X3: $i] :
                        ( ( X1 @ X3 )
                       => ( X2 = X3 ) ) )
           => ~ ! [X2: $i] :
                  ( ( X1 @ X2 )
                 => ~ ! [X3: $i] :
                        ( ( X1 @ X3 )
                       => ( X2 = X3 ) ) ) )
       => ( ! [X1: $o,X2: $i] :
              ( ( in @ X2 @ ( prop2set @ X1 ) )
             => X1 )
         => ( ! [X1: $i] :
                ( ( in @ X1 @ emptyset )
               => ! [X2: $o] : X2 )
           => ( ! [X1: $i] :
                  ~ ( in @ X1 @ emptyset )
             => ( ! [X1: $i] :
                    ~ ( in @ X1 @ emptyset )
               => ( ! [X1: $i > $o] :
                      ( ~ ! [X2: $i] :
                            ( ( X1 @ X2 )
                           => ~ ! [X3: $i] :
                                  ( ( X1 @ X3 )
                                 => ( X2 = X3 ) ) )
                     => ~ ! [X2: $i] :
                            ~ ( X1 @ X2 ) )
                 => ( ! [X1: $i,X2: $i] :
                        ( ! [X3: $i] :
                            ( ( in @ X3 @ X1 )
                           => ( in @ X3 @ X2 ) )
                       => ( ! [X3: $i] :
                              ( ( in @ X3 @ X2 )
                             => ( in @ X3 @ X1 ) )
                         => ( X1 = X2 ) ) )
                   => ( ! [X1: $i] :
                          ( ! [X2: $i] :
                              ~ ( in @ X2 @ X1 )
                         => ( X1 = emptyset ) )
                     => ( ! [X1: $i] :
                            ( ! [X2: $i] :
                                ~ ( in @ X2 @ X1 )
                           => ( X1 = emptyset ) )
                       => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                              ( ( in @ X3 @ X1 )
                             => ( ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) )
                                = ( X2 @ X3 ) ) )
                         => ( ! [X1: $i] :
                                ( ( X1 != emptyset )
                               => ~ ! [X2: $i] :
                                      ~ ( in @ X2 @ X1 ) )
                           => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                                  ( ( in @ X3 @ X1 )
                                 => ( ( X2 @ X3 )
                                   => ( ( dsetconstr @ X1 @ X2 )
                                     != emptyset ) ) )
                             => ( ! [X1: $i] :
                                    ( ~ ! [X2: $i] :
                                          ~ ( in @ X2 @ X1 )
                                   => ( X1 != emptyset ) )
                               => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ X2 ) )
                                 => ( ( in @ emptyset @ ( setadjoin @ emptyset @ emptyset ) )
                                   => ( ! [X1: $i,X2: $i,X3: $i] :
                                          ( ( in @ X3 @ X2 )
                                         => ( in @ X3 @ ( setadjoin @ X1 @ X2 ) ) )
                                     => ( ! [X1: $i,X2: $i,X3: $i] :
                                            ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
                                           => ! [X4: $o] :
                                                ( ( ( X3 = X1 )
                                                 => X4 )
                                               => ( ( ( in @ X3 @ X2 )
                                                   => X4 )
                                                 => X4 ) ) )
                                       => ( ! [X1: $i,X2: $i,X3: $i] :
                                              ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
                                             => ( ( X3 != X1 )
                                               => ( in @ X3 @ X2 ) ) )
                                         => ( ! [X1: $i] :
                                                ( ( dsetconstr @ X1
                                                  @ ^ [X2: $i] : ~ $false )
                                                = X1 )
                                           => ( ! [X1: $i,X2: $i] :
                                                  ( ! [X3: $i] :
                                                      ( ( in @ X3 @ X2 )
                                                     => ( in @ X3 @ X1 ) )
                                                 => ( in @ X2 @ ( powerset @ X1 ) ) )
                                             => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
                                               => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
                                                 => ( ! [X1: $i,X2: $i,X3: $i] :
                                                        ( ( in @ X2 @ ( powerset @ X1 ) )
                                                       => ( ( in @ X3 @ X2 )
                                                         => ( in @ X3 @ X1 ) ) )
                                                   => ( ! [X1: $i,X2: $i,X3: $i] :
                                                          ( ( in @ X2 @ X3 )
                                                         => ( ( in @ X3 @ X1 )
                                                           => ( in @ X2 @ ( setunion @ X1 ) ) ) )
                                                     => ( ! [X1: $i,X2: $i] :
                                                            ( ( in @ X2 @ ( setunion @ X1 ) )
                                                           => ! [X3: $o] :
                                                                ( ! [X4: $i] :
                                                                    ( ( in @ X2 @ X4 )
                                                                   => ( ( in @ X4 @ X1 )
                                                                     => X3 ) )
                                                               => X3 ) )
                                                       => ( ! [X1: $i,X2: $i] :
                                                              ( ( in @ X2 @ X1 )
                                                             => ( in @ X2 @ ( powerset @ ( setunion @ X1 ) ) ) )
                                                         => ( ! [X1: $i > $o] :
                                                                ( ~ ! [X2: $i] :
                                                                      ( ( X1 @ X2 )
                                                                     => ~ ! [X3: $i] :
                                                                            ( ( X1 @ X3 )
                                                                           => ( X2 = X3 ) ) )
                                                               => ~ ! [X2: $i] :
                                                                      ~ ! [X3: $i] :
                                                                          ( ( X1 @ X3 )
                                                                          = ( X3 = X2 ) ) )
                                                           => ( ! [X1: $i] :
                                                                  ( ( X1 != emptyset )
                                                                 => ~ ! [X2: $i] :
                                                                        ~ ( in @ X2 @ X1 ) )
                                                             => ( ! [X1: $i,X2: $i] :
                                                                    ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                                                   => ( X1 = X2 ) )
                                                               => ( ! [X1: $i,X2: $i] :
                                                                      ( ( X1 != X2 )
                                                                     => ~ ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                                                                 => ( ! [X1: $i,X2: $i] :
                                                                        ( ( X1 = X2 )
                                                                       => ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                   => ( ! [X1: $i,X2: $i] :
                                                                          ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                                                         => ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                                                                     => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                            ( ( in @ X3 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                           => ( ( X3 != X1 )
                                                                             => ( X3 = X2 ) ) )
                                                                       => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                         => ( ! [X1: $i,X2: $i] : ( in @ X2 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                           => ( ! [X1: $i,X2: $i > $o] :
                                                                                  ( ~ ! [X3: $i] :
                                                                                        ( ( in @ X3 @ X1 )
                                                                                       => ~ ( X2 @ X3 ) )
                                                                                 => ( ( dsetconstr @ X1 @ X2 )
                                                                                   != emptyset ) )
                                                                             => ( ! [X1: $i > $o,X2: $i] :
                                                                                    ( ( in @ X2 @ emptyset )
                                                                                   => ( X1 @ X2 ) )
                                                                               => ( ! [X1: $i,X2: $i > $o] :
                                                                                      ( ~ ! [X3: $i] :
                                                                                            ( ( in @ X3 @ X1 )
                                                                                           => ( X2 @ X3 ) )
                                                                                     => ~ ! [X3: $i] :
                                                                                            ( ( in @ X3 @ X1 )
                                                                                           => ( X2 @ X3 ) ) )
                                                                                 => ( ! [X1: $i,X2: $i > $o] :
                                                                                        ( ! [X3: $i] :
                                                                                            ( ( in @ X3 @ X1 )
                                                                                           => ~ ( X2 @ X3 ) )
                                                                                       => ! [X3: $i] :
                                                                                            ( ( in @ X3 @ X1 )
                                                                                           => ~ ( X2 @ X3 ) ) )
                                                                                   => ( ! [X1: $i,X2: $i > $o] :
                                                                                          ( ! [X3: $i] :
                                                                                              ( ( in @ X3 @ X1 )
                                                                                             => ~ ( X2 @ X3 ) )
                                                                                         => ! [X3: $i] :
                                                                                              ( ( in @ X3 @ X1 )
                                                                                             => ~ ( X2 @ X3 ) ) )
                                                                                     => ( ! [X1: $i,X2: $i > $o] :
                                                                                            ( ~ ! [X3: $i] :
                                                                                                  ( ( in @ X3 @ X1 )
                                                                                                 => ( X2 @ X3 ) )
                                                                                           => ~ ! [X3: $i] :
                                                                                                  ( ( in @ X3 @ X1 )
                                                                                                 => ( X2 @ X3 ) ) )
                                                                                       => ( ! [X1: $o] :
                                                                                              ( X1
                                                                                             => ( in @ emptyset @ ( prop2set @ X1 ) ) )
                                                                                         => ( ! [X1: $o] :
                                                                                                ( X1
                                                                                               => ( set2prop @ ( prop2set @ X1 ) ) )
                                                                                           => ( ! [X1: $i,X2: $i > $o] :
                                                                                                  ( ! [X3: $i] :
                                                                                                      ( ( in @ X3 @ X1 )
                                                                                                     => ~ ( X2 @ X3 ) )
                                                                                                 => ! [X3: $i] :
                                                                                                      ( ( in @ X3 @ X1 )
                                                                                                     => ~ ( X2 @ X3 ) ) )
                                                                                             => ( ! [X1: $i,X2: $i > $o] :
                                                                                                    ( ~ ! [X3: $i] :
                                                                                                          ( ( in @ X3 @ X1 )
                                                                                                         => ( X2 @ X3 ) )
                                                                                                   => ~ ! [X3: $i] :
                                                                                                          ( ( in @ X3 @ X1 )
                                                                                                         => ( X2 @ X3 ) ) )
                                                                                               => ( ! [X1: $i > $o] :
                                                                                                      ( ~ ! [X2: $i] :
                                                                                                            ( ( X1 @ X2 )
                                                                                                           => ~ ! [X3: $i] :
                                                                                                                  ( ( X1 @ X3 )
                                                                                                                 => ( X2 = X3 ) ) )
                                                                                                     => ~ ! [X2: $i] :
                                                                                                            ( ( X1 @ X2 )
                                                                                                           => ~ ! [X3: $i] :
                                                                                                                  ( ( X1 @ X3 )
                                                                                                                 => ( X2 = X3 ) ) ) )
                                                                                                 => ( ! [X1: $i > $o] :
                                                                                                        ( ~ ! [X2: $i] :
                                                                                                              ~ ( X1 @ X2 )
                                                                                                       => ( ! [X2: $i,X3: $i] :
                                                                                                              ( ( X1 @ X2 )
                                                                                                             => ( ( X1 @ X3 )
                                                                                                               => ( X2 = X3 ) ) )
                                                                                                         => ~ ! [X2: $i] :
                                                                                                                ( ( X1 @ X2 )
                                                                                                               => ~ ! [X3: $i] :
                                                                                                                      ( ( X1 @ X3 )
                                                                                                                     => ( X2 = X3 ) ) ) ) )
                                                                                                   => ! [X1: $i > $o] :
                                                                                                        ( ~ ! [X2: $i] :
                                                                                                              ~ ! [X3: $i] :
                                                                                                                  ( ( X1 @ X3 )
                                                                                                                  = ( X3 = X2 ) )
                                                                                                       => ~ ! [X2: $i] :
                                                                                                              ( ( X1 @ X2 )
                                                                                                             => ~ ! [X3: $i] :
                                                                                                                    ( ( X1 @ X3 )
                                                                                                                   => ( X2 = X3 ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ),
    introduced(assumption,[]) ).

thf(h30,assumption,
    ! [X1: $i,X2: $i > $o,X3: $i] :
      ( ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) )
     => ( X2 @ X3 ) ),
    introduced(assumption,[]) ).

thf(h31,assumption,
    ~ ( ! [X1: $i > $o] :
          ( ~ ! [X2: $i] :
                ( ( X1 @ X2 )
               => ~ ! [X3: $i] :
                      ( ( X1 @ X3 )
                     => ( X2 = X3 ) ) )
         => ~ ! [X2: $i] :
                ( ( X1 @ X2 )
               => ~ ! [X3: $i] :
                      ( ( X1 @ X3 )
                     => ( X2 = X3 ) ) ) )
     => ( ! [X1: $o,X2: $i] :
            ( ( in @ X2 @ ( prop2set @ X1 ) )
           => X1 )
       => ( ! [X1: $i] :
              ( ( in @ X1 @ emptyset )
             => ! [X2: $o] : X2 )
         => ( ! [X1: $i] :
                ~ ( in @ X1 @ emptyset )
           => ( ! [X1: $i] :
                  ~ ( in @ X1 @ emptyset )
             => ( ! [X1: $i > $o] :
                    ( ~ ! [X2: $i] :
                          ( ( X1 @ X2 )
                         => ~ ! [X3: $i] :
                                ( ( X1 @ X3 )
                               => ( X2 = X3 ) ) )
                   => ~ ! [X2: $i] :
                          ~ ( X1 @ X2 ) )
               => ( ! [X1: $i,X2: $i] :
                      ( ! [X3: $i] :
                          ( ( in @ X3 @ X1 )
                         => ( in @ X3 @ X2 ) )
                     => ( ! [X3: $i] :
                            ( ( in @ X3 @ X2 )
                           => ( in @ X3 @ X1 ) )
                       => ( X1 = X2 ) ) )
                 => ( ! [X1: $i] :
                        ( ! [X2: $i] :
                            ~ ( in @ X2 @ X1 )
                       => ( X1 = emptyset ) )
                   => ( ! [X1: $i] :
                          ( ! [X2: $i] :
                              ~ ( in @ X2 @ X1 )
                         => ( X1 = emptyset ) )
                     => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                            ( ( in @ X3 @ X1 )
                           => ( ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) )
                              = ( X2 @ X3 ) ) )
                       => ( ! [X1: $i] :
                              ( ( X1 != emptyset )
                             => ~ ! [X2: $i] :
                                    ~ ( in @ X2 @ X1 ) )
                         => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                                ( ( in @ X3 @ X1 )
                               => ( ( X2 @ X3 )
                                 => ( ( dsetconstr @ X1 @ X2 )
                                   != emptyset ) ) )
                           => ( ! [X1: $i] :
                                  ( ~ ! [X2: $i] :
                                        ~ ( in @ X2 @ X1 )
                                 => ( X1 != emptyset ) )
                             => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ X2 ) )
                               => ( ( in @ emptyset @ ( setadjoin @ emptyset @ emptyset ) )
                                 => ( ! [X1: $i,X2: $i,X3: $i] :
                                        ( ( in @ X3 @ X2 )
                                       => ( in @ X3 @ ( setadjoin @ X1 @ X2 ) ) )
                                   => ( ! [X1: $i,X2: $i,X3: $i] :
                                          ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
                                         => ! [X4: $o] :
                                              ( ( ( X3 = X1 )
                                               => X4 )
                                             => ( ( ( in @ X3 @ X2 )
                                                 => X4 )
                                               => X4 ) ) )
                                     => ( ! [X1: $i,X2: $i,X3: $i] :
                                            ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
                                           => ( ( X3 != X1 )
                                             => ( in @ X3 @ X2 ) ) )
                                       => ( ! [X1: $i] :
                                              ( ( dsetconstr @ X1
                                                @ ^ [X2: $i] : ~ $false )
                                              = X1 )
                                         => ( ! [X1: $i,X2: $i] :
                                                ( ! [X3: $i] :
                                                    ( ( in @ X3 @ X2 )
                                                   => ( in @ X3 @ X1 ) )
                                               => ( in @ X2 @ ( powerset @ X1 ) ) )
                                           => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
                                             => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
                                               => ( ! [X1: $i,X2: $i,X3: $i] :
                                                      ( ( in @ X2 @ ( powerset @ X1 ) )
                                                     => ( ( in @ X3 @ X2 )
                                                       => ( in @ X3 @ X1 ) ) )
                                                 => ( ! [X1: $i,X2: $i,X3: $i] :
                                                        ( ( in @ X2 @ X3 )
                                                       => ( ( in @ X3 @ X1 )
                                                         => ( in @ X2 @ ( setunion @ X1 ) ) ) )
                                                   => ( ! [X1: $i,X2: $i] :
                                                          ( ( in @ X2 @ ( setunion @ X1 ) )
                                                         => ! [X3: $o] :
                                                              ( ! [X4: $i] :
                                                                  ( ( in @ X2 @ X4 )
                                                                 => ( ( in @ X4 @ X1 )
                                                                   => X3 ) )
                                                             => X3 ) )
                                                     => ( ! [X1: $i,X2: $i] :
                                                            ( ( in @ X2 @ X1 )
                                                           => ( in @ X2 @ ( powerset @ ( setunion @ X1 ) ) ) )
                                                       => ( ! [X1: $i > $o] :
                                                              ( ~ ! [X2: $i] :
                                                                    ( ( X1 @ X2 )
                                                                   => ~ ! [X3: $i] :
                                                                          ( ( X1 @ X3 )
                                                                         => ( X2 = X3 ) ) )
                                                             => ~ ! [X2: $i] :
                                                                    ~ ! [X3: $i] :
                                                                        ( ( X1 @ X3 )
                                                                        = ( X3 = X2 ) ) )
                                                         => ( ! [X1: $i] :
                                                                ( ( X1 != emptyset )
                                                               => ~ ! [X2: $i] :
                                                                      ~ ( in @ X2 @ X1 ) )
                                                           => ( ! [X1: $i,X2: $i] :
                                                                  ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                                                 => ( X1 = X2 ) )
                                                             => ( ! [X1: $i,X2: $i] :
                                                                    ( ( X1 != X2 )
                                                                   => ~ ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                                                               => ( ! [X1: $i,X2: $i] :
                                                                      ( ( X1 = X2 )
                                                                     => ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                 => ( ! [X1: $i,X2: $i] :
                                                                        ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                                                       => ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                                                                   => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                          ( ( in @ X3 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                         => ( ( X3 != X1 )
                                                                           => ( X3 = X2 ) ) )
                                                                     => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                       => ( ! [X1: $i,X2: $i] : ( in @ X2 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                         => ( ! [X1: $i,X2: $i > $o] :
                                                                                ( ~ ! [X3: $i] :
                                                                                      ( ( in @ X3 @ X1 )
                                                                                     => ~ ( X2 @ X3 ) )
                                                                               => ( ( dsetconstr @ X1 @ X2 )
                                                                                 != emptyset ) )
                                                                           => ( ! [X1: $i > $o,X2: $i] :
                                                                                  ( ( in @ X2 @ emptyset )
                                                                                 => ( X1 @ X2 ) )
                                                                             => ( ! [X1: $i,X2: $i > $o] :
                                                                                    ( ~ ! [X3: $i] :
                                                                                          ( ( in @ X3 @ X1 )
                                                                                         => ( X2 @ X3 ) )
                                                                                   => ~ ! [X3: $i] :
                                                                                          ( ( in @ X3 @ X1 )
                                                                                         => ( X2 @ X3 ) ) )
                                                                               => ( ! [X1: $i,X2: $i > $o] :
                                                                                      ( ! [X3: $i] :
                                                                                          ( ( in @ X3 @ X1 )
                                                                                         => ~ ( X2 @ X3 ) )
                                                                                     => ! [X3: $i] :
                                                                                          ( ( in @ X3 @ X1 )
                                                                                         => ~ ( X2 @ X3 ) ) )
                                                                                 => ( ! [X1: $i,X2: $i > $o] :
                                                                                        ( ! [X3: $i] :
                                                                                            ( ( in @ X3 @ X1 )
                                                                                           => ~ ( X2 @ X3 ) )
                                                                                       => ! [X3: $i] :
                                                                                            ( ( in @ X3 @ X1 )
                                                                                           => ~ ( X2 @ X3 ) ) )
                                                                                   => ( ! [X1: $i,X2: $i > $o] :
                                                                                          ( ~ ! [X3: $i] :
                                                                                                ( ( in @ X3 @ X1 )
                                                                                               => ( X2 @ X3 ) )
                                                                                         => ~ ! [X3: $i] :
                                                                                                ( ( in @ X3 @ X1 )
                                                                                               => ( X2 @ X3 ) ) )
                                                                                     => ( ! [X1: $o] :
                                                                                            ( X1
                                                                                           => ( in @ emptyset @ ( prop2set @ X1 ) ) )
                                                                                       => ( ! [X1: $o] :
                                                                                              ( X1
                                                                                             => ( set2prop @ ( prop2set @ X1 ) ) )
                                                                                         => ( ! [X1: $i,X2: $i > $o] :
                                                                                                ( ! [X3: $i] :
                                                                                                    ( ( in @ X3 @ X1 )
                                                                                                   => ~ ( X2 @ X3 ) )
                                                                                               => ! [X3: $i] :
                                                                                                    ( ( in @ X3 @ X1 )
                                                                                                   => ~ ( X2 @ X3 ) ) )
                                                                                           => ( ! [X1: $i,X2: $i > $o] :
                                                                                                  ( ~ ! [X3: $i] :
                                                                                                        ( ( in @ X3 @ X1 )
                                                                                                       => ( X2 @ X3 ) )
                                                                                                 => ~ ! [X3: $i] :
                                                                                                        ( ( in @ X3 @ X1 )
                                                                                                       => ( X2 @ X3 ) ) )
                                                                                             => ( ! [X1: $i > $o] :
                                                                                                    ( ~ ! [X2: $i] :
                                                                                                          ( ( X1 @ X2 )
                                                                                                         => ~ ! [X3: $i] :
                                                                                                                ( ( X1 @ X3 )
                                                                                                               => ( X2 = X3 ) ) )
                                                                                                   => ~ ! [X2: $i] :
                                                                                                          ( ( X1 @ X2 )
                                                                                                         => ~ ! [X3: $i] :
                                                                                                                ( ( X1 @ X3 )
                                                                                                               => ( X2 = X3 ) ) ) )
                                                                                               => ( ! [X1: $i > $o] :
                                                                                                      ( ~ ! [X2: $i] :
                                                                                                            ~ ( X1 @ X2 )
                                                                                                     => ( ! [X2: $i,X3: $i] :
                                                                                                            ( ( X1 @ X2 )
                                                                                                           => ( ( X1 @ X3 )
                                                                                                             => ( X2 = X3 ) ) )
                                                                                                       => ~ ! [X2: $i] :
                                                                                                              ( ( X1 @ X2 )
                                                                                                             => ~ ! [X3: $i] :
                                                                                                                    ( ( X1 @ X3 )
                                                                                                                   => ( X2 = X3 ) ) ) ) )
                                                                                                 => ! [X1: $i > $o] :
                                                                                                      ( ~ ! [X2: $i] :
                                                                                                            ~ ! [X3: $i] :
                                                                                                                ( ( X1 @ X3 )
                                                                                                                = ( X3 = X2 ) )
                                                                                                     => ~ ! [X2: $i] :
                                                                                                            ( ( X1 @ X2 )
                                                                                                           => ~ ! [X3: $i] :
                                                                                                                  ( ( X1 @ X3 )
                                                                                                                 => ( X2 = X3 ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ),
    introduced(assumption,[]) ).

thf(h32,assumption,
    ! [X1: $i > $o] :
      ( ~ ! [X2: $i] :
            ( ( X1 @ X2 )
           => ~ ! [X3: $i] :
                  ( ( X1 @ X3 )
                 => ( X2 = X3 ) ) )
     => ~ ! [X2: $i] :
            ( ( X1 @ X2 )
           => ~ ! [X3: $i] :
                  ( ( X1 @ X3 )
                 => ( X2 = X3 ) ) ) ),
    introduced(assumption,[]) ).

thf(h33,assumption,
    ~ ( ! [X1: $o,X2: $i] :
          ( ( in @ X2 @ ( prop2set @ X1 ) )
         => X1 )
     => ( ! [X1: $i] :
            ( ( in @ X1 @ emptyset )
           => ! [X2: $o] : X2 )
       => ( ! [X1: $i] :
              ~ ( in @ X1 @ emptyset )
         => ( ! [X1: $i] :
                ~ ( in @ X1 @ emptyset )
           => ( ! [X1: $i > $o] :
                  ( ~ ! [X2: $i] :
                        ( ( X1 @ X2 )
                       => ~ ! [X3: $i] :
                              ( ( X1 @ X3 )
                             => ( X2 = X3 ) ) )
                 => ~ ! [X2: $i] :
                        ~ ( X1 @ X2 ) )
             => ( ! [X1: $i,X2: $i] :
                    ( ! [X3: $i] :
                        ( ( in @ X3 @ X1 )
                       => ( in @ X3 @ X2 ) )
                   => ( ! [X3: $i] :
                          ( ( in @ X3 @ X2 )
                         => ( in @ X3 @ X1 ) )
                     => ( X1 = X2 ) ) )
               => ( ! [X1: $i] :
                      ( ! [X2: $i] :
                          ~ ( in @ X2 @ X1 )
                     => ( X1 = emptyset ) )
                 => ( ! [X1: $i] :
                        ( ! [X2: $i] :
                            ~ ( in @ X2 @ X1 )
                       => ( X1 = emptyset ) )
                   => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                          ( ( in @ X3 @ X1 )
                         => ( ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) )
                            = ( X2 @ X3 ) ) )
                     => ( ! [X1: $i] :
                            ( ( X1 != emptyset )
                           => ~ ! [X2: $i] :
                                  ~ ( in @ X2 @ X1 ) )
                       => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                              ( ( in @ X3 @ X1 )
                             => ( ( X2 @ X3 )
                               => ( ( dsetconstr @ X1 @ X2 )
                                 != emptyset ) ) )
                         => ( ! [X1: $i] :
                                ( ~ ! [X2: $i] :
                                      ~ ( in @ X2 @ X1 )
                               => ( X1 != emptyset ) )
                           => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ X2 ) )
                             => ( ( in @ emptyset @ ( setadjoin @ emptyset @ emptyset ) )
                               => ( ! [X1: $i,X2: $i,X3: $i] :
                                      ( ( in @ X3 @ X2 )
                                     => ( in @ X3 @ ( setadjoin @ X1 @ X2 ) ) )
                                 => ( ! [X1: $i,X2: $i,X3: $i] :
                                        ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
                                       => ! [X4: $o] :
                                            ( ( ( X3 = X1 )
                                             => X4 )
                                           => ( ( ( in @ X3 @ X2 )
                                               => X4 )
                                             => X4 ) ) )
                                   => ( ! [X1: $i,X2: $i,X3: $i] :
                                          ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
                                         => ( ( X3 != X1 )
                                           => ( in @ X3 @ X2 ) ) )
                                     => ( ! [X1: $i] :
                                            ( ( dsetconstr @ X1
                                              @ ^ [X2: $i] : ~ $false )
                                            = X1 )
                                       => ( ! [X1: $i,X2: $i] :
                                              ( ! [X3: $i] :
                                                  ( ( in @ X3 @ X2 )
                                                 => ( in @ X3 @ X1 ) )
                                             => ( in @ X2 @ ( powerset @ X1 ) ) )
                                         => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
                                           => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
                                             => ( ! [X1: $i,X2: $i,X3: $i] :
                                                    ( ( in @ X2 @ ( powerset @ X1 ) )
                                                   => ( ( in @ X3 @ X2 )
                                                     => ( in @ X3 @ X1 ) ) )
                                               => ( ! [X1: $i,X2: $i,X3: $i] :
                                                      ( ( in @ X2 @ X3 )
                                                     => ( ( in @ X3 @ X1 )
                                                       => ( in @ X2 @ ( setunion @ X1 ) ) ) )
                                                 => ( ! [X1: $i,X2: $i] :
                                                        ( ( in @ X2 @ ( setunion @ X1 ) )
                                                       => ! [X3: $o] :
                                                            ( ! [X4: $i] :
                                                                ( ( in @ X2 @ X4 )
                                                               => ( ( in @ X4 @ X1 )
                                                                 => X3 ) )
                                                           => X3 ) )
                                                   => ( ! [X1: $i,X2: $i] :
                                                          ( ( in @ X2 @ X1 )
                                                         => ( in @ X2 @ ( powerset @ ( setunion @ X1 ) ) ) )
                                                     => ( ! [X1: $i > $o] :
                                                            ( ~ ! [X2: $i] :
                                                                  ( ( X1 @ X2 )
                                                                 => ~ ! [X3: $i] :
                                                                        ( ( X1 @ X3 )
                                                                       => ( X2 = X3 ) ) )
                                                           => ~ ! [X2: $i] :
                                                                  ~ ! [X3: $i] :
                                                                      ( ( X1 @ X3 )
                                                                      = ( X3 = X2 ) ) )
                                                       => ( ! [X1: $i] :
                                                              ( ( X1 != emptyset )
                                                             => ~ ! [X2: $i] :
                                                                    ~ ( in @ X2 @ X1 ) )
                                                         => ( ! [X1: $i,X2: $i] :
                                                                ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                                               => ( X1 = X2 ) )
                                                           => ( ! [X1: $i,X2: $i] :
                                                                  ( ( X1 != X2 )
                                                                 => ~ ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                                                             => ( ! [X1: $i,X2: $i] :
                                                                    ( ( X1 = X2 )
                                                                   => ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                               => ( ! [X1: $i,X2: $i] :
                                                                      ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                                                     => ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                                                                 => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                        ( ( in @ X3 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                       => ( ( X3 != X1 )
                                                                         => ( X3 = X2 ) ) )
                                                                   => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                     => ( ! [X1: $i,X2: $i] : ( in @ X2 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                       => ( ! [X1: $i,X2: $i > $o] :
                                                                              ( ~ ! [X3: $i] :
                                                                                    ( ( in @ X3 @ X1 )
                                                                                   => ~ ( X2 @ X3 ) )
                                                                             => ( ( dsetconstr @ X1 @ X2 )
                                                                               != emptyset ) )
                                                                         => ( ! [X1: $i > $o,X2: $i] :
                                                                                ( ( in @ X2 @ emptyset )
                                                                               => ( X1 @ X2 ) )
                                                                           => ( ! [X1: $i,X2: $i > $o] :
                                                                                  ( ~ ! [X3: $i] :
                                                                                        ( ( in @ X3 @ X1 )
                                                                                       => ( X2 @ X3 ) )
                                                                                 => ~ ! [X3: $i] :
                                                                                        ( ( in @ X3 @ X1 )
                                                                                       => ( X2 @ X3 ) ) )
                                                                             => ( ! [X1: $i,X2: $i > $o] :
                                                                                    ( ! [X3: $i] :
                                                                                        ( ( in @ X3 @ X1 )
                                                                                       => ~ ( X2 @ X3 ) )
                                                                                   => ! [X3: $i] :
                                                                                        ( ( in @ X3 @ X1 )
                                                                                       => ~ ( X2 @ X3 ) ) )
                                                                               => ( ! [X1: $i,X2: $i > $o] :
                                                                                      ( ! [X3: $i] :
                                                                                          ( ( in @ X3 @ X1 )
                                                                                         => ~ ( X2 @ X3 ) )
                                                                                     => ! [X3: $i] :
                                                                                          ( ( in @ X3 @ X1 )
                                                                                         => ~ ( X2 @ X3 ) ) )
                                                                                 => ( ! [X1: $i,X2: $i > $o] :
                                                                                        ( ~ ! [X3: $i] :
                                                                                              ( ( in @ X3 @ X1 )
                                                                                             => ( X2 @ X3 ) )
                                                                                       => ~ ! [X3: $i] :
                                                                                              ( ( in @ X3 @ X1 )
                                                                                             => ( X2 @ X3 ) ) )
                                                                                   => ( ! [X1: $o] :
                                                                                          ( X1
                                                                                         => ( in @ emptyset @ ( prop2set @ X1 ) ) )
                                                                                     => ( ! [X1: $o] :
                                                                                            ( X1
                                                                                           => ( set2prop @ ( prop2set @ X1 ) ) )
                                                                                       => ( ! [X1: $i,X2: $i > $o] :
                                                                                              ( ! [X3: $i] :
                                                                                                  ( ( in @ X3 @ X1 )
                                                                                                 => ~ ( X2 @ X3 ) )
                                                                                             => ! [X3: $i] :
                                                                                                  ( ( in @ X3 @ X1 )
                                                                                                 => ~ ( X2 @ X3 ) ) )
                                                                                         => ( ! [X1: $i,X2: $i > $o] :
                                                                                                ( ~ ! [X3: $i] :
                                                                                                      ( ( in @ X3 @ X1 )
                                                                                                     => ( X2 @ X3 ) )
                                                                                               => ~ ! [X3: $i] :
                                                                                                      ( ( in @ X3 @ X1 )
                                                                                                     => ( X2 @ X3 ) ) )
                                                                                           => ( ! [X1: $i > $o] :
                                                                                                  ( ~ ! [X2: $i] :
                                                                                                        ( ( X1 @ X2 )
                                                                                                       => ~ ! [X3: $i] :
                                                                                                              ( ( X1 @ X3 )
                                                                                                             => ( X2 = X3 ) ) )
                                                                                                 => ~ ! [X2: $i] :
                                                                                                        ( ( X1 @ X2 )
                                                                                                       => ~ ! [X3: $i] :
                                                                                                              ( ( X1 @ X3 )
                                                                                                             => ( X2 = X3 ) ) ) )
                                                                                             => ( ! [X1: $i > $o] :
                                                                                                    ( ~ ! [X2: $i] :
                                                                                                          ~ ( X1 @ X2 )
                                                                                                   => ( ! [X2: $i,X3: $i] :
                                                                                                          ( ( X1 @ X2 )
                                                                                                         => ( ( X1 @ X3 )
                                                                                                           => ( X2 = X3 ) ) )
                                                                                                     => ~ ! [X2: $i] :
                                                                                                            ( ( X1 @ X2 )
                                                                                                           => ~ ! [X3: $i] :
                                                                                                                  ( ( X1 @ X3 )
                                                                                                                 => ( X2 = X3 ) ) ) ) )
                                                                                               => ! [X1: $i > $o] :
                                                                                                    ( ~ ! [X2: $i] :
                                                                                                          ~ ! [X3: $i] :
                                                                                                              ( ( X1 @ X3 )
                                                                                                              = ( X3 = X2 ) )
                                                                                                   => ~ ! [X2: $i] :
                                                                                                          ( ( X1 @ X2 )
                                                                                                         => ~ ! [X3: $i] :
                                                                                                                ( ( X1 @ X3 )
                                                                                                               => ( X2 = X3 ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ),
    introduced(assumption,[]) ).

thf(h34,assumption,
    ! [X1: $o,X2: $i] :
      ( ( in @ X2 @ ( prop2set @ X1 ) )
     => X1 ),
    introduced(assumption,[]) ).

thf(h35,assumption,
    ~ ( ! [X1: $i] :
          ( ( in @ X1 @ emptyset )
         => ! [X2: $o] : X2 )
     => ( ! [X1: $i] :
            ~ ( in @ X1 @ emptyset )
       => ( ! [X1: $i] :
              ~ ( in @ X1 @ emptyset )
         => ( ! [X1: $i > $o] :
                ( ~ ! [X2: $i] :
                      ( ( X1 @ X2 )
                     => ~ ! [X3: $i] :
                            ( ( X1 @ X3 )
                           => ( X2 = X3 ) ) )
               => ~ ! [X2: $i] :
                      ~ ( X1 @ X2 ) )
           => ( ! [X1: $i,X2: $i] :
                  ( ! [X3: $i] :
                      ( ( in @ X3 @ X1 )
                     => ( in @ X3 @ X2 ) )
                 => ( ! [X3: $i] :
                        ( ( in @ X3 @ X2 )
                       => ( in @ X3 @ X1 ) )
                   => ( X1 = X2 ) ) )
             => ( ! [X1: $i] :
                    ( ! [X2: $i] :
                        ~ ( in @ X2 @ X1 )
                   => ( X1 = emptyset ) )
               => ( ! [X1: $i] :
                      ( ! [X2: $i] :
                          ~ ( in @ X2 @ X1 )
                     => ( X1 = emptyset ) )
                 => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                        ( ( in @ X3 @ X1 )
                       => ( ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) )
                          = ( X2 @ X3 ) ) )
                   => ( ! [X1: $i] :
                          ( ( X1 != emptyset )
                         => ~ ! [X2: $i] :
                                ~ ( in @ X2 @ X1 ) )
                     => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                            ( ( in @ X3 @ X1 )
                           => ( ( X2 @ X3 )
                             => ( ( dsetconstr @ X1 @ X2 )
                               != emptyset ) ) )
                       => ( ! [X1: $i] :
                              ( ~ ! [X2: $i] :
                                    ~ ( in @ X2 @ X1 )
                             => ( X1 != emptyset ) )
                         => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ X2 ) )
                           => ( ( in @ emptyset @ ( setadjoin @ emptyset @ emptyset ) )
                             => ( ! [X1: $i,X2: $i,X3: $i] :
                                    ( ( in @ X3 @ X2 )
                                   => ( in @ X3 @ ( setadjoin @ X1 @ X2 ) ) )
                               => ( ! [X1: $i,X2: $i,X3: $i] :
                                      ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
                                     => ! [X4: $o] :
                                          ( ( ( X3 = X1 )
                                           => X4 )
                                         => ( ( ( in @ X3 @ X2 )
                                             => X4 )
                                           => X4 ) ) )
                                 => ( ! [X1: $i,X2: $i,X3: $i] :
                                        ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
                                       => ( ( X3 != X1 )
                                         => ( in @ X3 @ X2 ) ) )
                                   => ( ! [X1: $i] :
                                          ( ( dsetconstr @ X1
                                            @ ^ [X2: $i] : ~ $false )
                                          = X1 )
                                     => ( ! [X1: $i,X2: $i] :
                                            ( ! [X3: $i] :
                                                ( ( in @ X3 @ X2 )
                                               => ( in @ X3 @ X1 ) )
                                           => ( in @ X2 @ ( powerset @ X1 ) ) )
                                       => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
                                         => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
                                           => ( ! [X1: $i,X2: $i,X3: $i] :
                                                  ( ( in @ X2 @ ( powerset @ X1 ) )
                                                 => ( ( in @ X3 @ X2 )
                                                   => ( in @ X3 @ X1 ) ) )
                                             => ( ! [X1: $i,X2: $i,X3: $i] :
                                                    ( ( in @ X2 @ X3 )
                                                   => ( ( in @ X3 @ X1 )
                                                     => ( in @ X2 @ ( setunion @ X1 ) ) ) )
                                               => ( ! [X1: $i,X2: $i] :
                                                      ( ( in @ X2 @ ( setunion @ X1 ) )
                                                     => ! [X3: $o] :
                                                          ( ! [X4: $i] :
                                                              ( ( in @ X2 @ X4 )
                                                             => ( ( in @ X4 @ X1 )
                                                               => X3 ) )
                                                         => X3 ) )
                                                 => ( ! [X1: $i,X2: $i] :
                                                        ( ( in @ X2 @ X1 )
                                                       => ( in @ X2 @ ( powerset @ ( setunion @ X1 ) ) ) )
                                                   => ( ! [X1: $i > $o] :
                                                          ( ~ ! [X2: $i] :
                                                                ( ( X1 @ X2 )
                                                               => ~ ! [X3: $i] :
                                                                      ( ( X1 @ X3 )
                                                                     => ( X2 = X3 ) ) )
                                                         => ~ ! [X2: $i] :
                                                                ~ ! [X3: $i] :
                                                                    ( ( X1 @ X3 )
                                                                    = ( X3 = X2 ) ) )
                                                     => ( ! [X1: $i] :
                                                            ( ( X1 != emptyset )
                                                           => ~ ! [X2: $i] :
                                                                  ~ ( in @ X2 @ X1 ) )
                                                       => ( ! [X1: $i,X2: $i] :
                                                              ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                                             => ( X1 = X2 ) )
                                                         => ( ! [X1: $i,X2: $i] :
                                                                ( ( X1 != X2 )
                                                               => ~ ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                                                           => ( ! [X1: $i,X2: $i] :
                                                                  ( ( X1 = X2 )
                                                                 => ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                             => ( ! [X1: $i,X2: $i] :
                                                                    ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                                                   => ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                                                               => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                      ( ( in @ X3 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                     => ( ( X3 != X1 )
                                                                       => ( X3 = X2 ) ) )
                                                                 => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                   => ( ! [X1: $i,X2: $i] : ( in @ X2 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                     => ( ! [X1: $i,X2: $i > $o] :
                                                                            ( ~ ! [X3: $i] :
                                                                                  ( ( in @ X3 @ X1 )
                                                                                 => ~ ( X2 @ X3 ) )
                                                                           => ( ( dsetconstr @ X1 @ X2 )
                                                                             != emptyset ) )
                                                                       => ( ! [X1: $i > $o,X2: $i] :
                                                                              ( ( in @ X2 @ emptyset )
                                                                             => ( X1 @ X2 ) )
                                                                         => ( ! [X1: $i,X2: $i > $o] :
                                                                                ( ~ ! [X3: $i] :
                                                                                      ( ( in @ X3 @ X1 )
                                                                                     => ( X2 @ X3 ) )
                                                                               => ~ ! [X3: $i] :
                                                                                      ( ( in @ X3 @ X1 )
                                                                                     => ( X2 @ X3 ) ) )
                                                                           => ( ! [X1: $i,X2: $i > $o] :
                                                                                  ( ! [X3: $i] :
                                                                                      ( ( in @ X3 @ X1 )
                                                                                     => ~ ( X2 @ X3 ) )
                                                                                 => ! [X3: $i] :
                                                                                      ( ( in @ X3 @ X1 )
                                                                                     => ~ ( X2 @ X3 ) ) )
                                                                             => ( ! [X1: $i,X2: $i > $o] :
                                                                                    ( ! [X3: $i] :
                                                                                        ( ( in @ X3 @ X1 )
                                                                                       => ~ ( X2 @ X3 ) )
                                                                                   => ! [X3: $i] :
                                                                                        ( ( in @ X3 @ X1 )
                                                                                       => ~ ( X2 @ X3 ) ) )
                                                                               => ( ! [X1: $i,X2: $i > $o] :
                                                                                      ( ~ ! [X3: $i] :
                                                                                            ( ( in @ X3 @ X1 )
                                                                                           => ( X2 @ X3 ) )
                                                                                     => ~ ! [X3: $i] :
                                                                                            ( ( in @ X3 @ X1 )
                                                                                           => ( X2 @ X3 ) ) )
                                                                                 => ( ! [X1: $o] :
                                                                                        ( X1
                                                                                       => ( in @ emptyset @ ( prop2set @ X1 ) ) )
                                                                                   => ( ! [X1: $o] :
                                                                                          ( X1
                                                                                         => ( set2prop @ ( prop2set @ X1 ) ) )
                                                                                     => ( ! [X1: $i,X2: $i > $o] :
                                                                                            ( ! [X3: $i] :
                                                                                                ( ( in @ X3 @ X1 )
                                                                                               => ~ ( X2 @ X3 ) )
                                                                                           => ! [X3: $i] :
                                                                                                ( ( in @ X3 @ X1 )
                                                                                               => ~ ( X2 @ X3 ) ) )
                                                                                       => ( ! [X1: $i,X2: $i > $o] :
                                                                                              ( ~ ! [X3: $i] :
                                                                                                    ( ( in @ X3 @ X1 )
                                                                                                   => ( X2 @ X3 ) )
                                                                                             => ~ ! [X3: $i] :
                                                                                                    ( ( in @ X3 @ X1 )
                                                                                                   => ( X2 @ X3 ) ) )
                                                                                         => ( ! [X1: $i > $o] :
                                                                                                ( ~ ! [X2: $i] :
                                                                                                      ( ( X1 @ X2 )
                                                                                                     => ~ ! [X3: $i] :
                                                                                                            ( ( X1 @ X3 )
                                                                                                           => ( X2 = X3 ) ) )
                                                                                               => ~ ! [X2: $i] :
                                                                                                      ( ( X1 @ X2 )
                                                                                                     => ~ ! [X3: $i] :
                                                                                                            ( ( X1 @ X3 )
                                                                                                           => ( X2 = X3 ) ) ) )
                                                                                           => ( ! [X1: $i > $o] :
                                                                                                  ( ~ ! [X2: $i] :
                                                                                                        ~ ( X1 @ X2 )
                                                                                                 => ( ! [X2: $i,X3: $i] :
                                                                                                        ( ( X1 @ X2 )
                                                                                                       => ( ( X1 @ X3 )
                                                                                                         => ( X2 = X3 ) ) )
                                                                                                   => ~ ! [X2: $i] :
                                                                                                          ( ( X1 @ X2 )
                                                                                                         => ~ ! [X3: $i] :
                                                                                                                ( ( X1 @ X3 )
                                                                                                               => ( X2 = X3 ) ) ) ) )
                                                                                             => ! [X1: $i > $o] :
                                                                                                  ( ~ ! [X2: $i] :
                                                                                                        ~ ! [X3: $i] :
                                                                                                            ( ( X1 @ X3 )
                                                                                                            = ( X3 = X2 ) )
                                                                                                 => ~ ! [X2: $i] :
                                                                                                        ( ( X1 @ X2 )
                                                                                                       => ~ ! [X3: $i] :
                                                                                                              ( ( X1 @ X3 )
                                                                                                             => ( X2 = X3 ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ),
    introduced(assumption,[]) ).

thf(h36,assumption,
    ! [X1: $i] :
      ( ( in @ X1 @ emptyset )
     => ! [X2: $o] : X2 ),
    introduced(assumption,[]) ).

thf(h37,assumption,
    ~ ( ! [X1: $i] :
          ~ ( in @ X1 @ emptyset )
     => ( ! [X1: $i] :
            ~ ( in @ X1 @ emptyset )
       => ( ! [X1: $i > $o] :
              ( ~ ! [X2: $i] :
                    ( ( X1 @ X2 )
                   => ~ ! [X3: $i] :
                          ( ( X1 @ X3 )
                         => ( X2 = X3 ) ) )
             => ~ ! [X2: $i] :
                    ~ ( X1 @ X2 ) )
         => ( ! [X1: $i,X2: $i] :
                ( ! [X3: $i] :
                    ( ( in @ X3 @ X1 )
                   => ( in @ X3 @ X2 ) )
               => ( ! [X3: $i] :
                      ( ( in @ X3 @ X2 )
                     => ( in @ X3 @ X1 ) )
                 => ( X1 = X2 ) ) )
           => ( ! [X1: $i] :
                  ( ! [X2: $i] :
                      ~ ( in @ X2 @ X1 )
                 => ( X1 = emptyset ) )
             => ( ! [X1: $i] :
                    ( ! [X2: $i] :
                        ~ ( in @ X2 @ X1 )
                   => ( X1 = emptyset ) )
               => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                      ( ( in @ X3 @ X1 )
                     => ( ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) )
                        = ( X2 @ X3 ) ) )
                 => ( ! [X1: $i] :
                        ( ( X1 != emptyset )
                       => ~ ! [X2: $i] :
                              ~ ( in @ X2 @ X1 ) )
                   => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                          ( ( in @ X3 @ X1 )
                         => ( ( X2 @ X3 )
                           => ( ( dsetconstr @ X1 @ X2 )
                             != emptyset ) ) )
                     => ( ! [X1: $i] :
                            ( ~ ! [X2: $i] :
                                  ~ ( in @ X2 @ X1 )
                           => ( X1 != emptyset ) )
                       => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ X2 ) )
                         => ( ( in @ emptyset @ ( setadjoin @ emptyset @ emptyset ) )
                           => ( ! [X1: $i,X2: $i,X3: $i] :
                                  ( ( in @ X3 @ X2 )
                                 => ( in @ X3 @ ( setadjoin @ X1 @ X2 ) ) )
                             => ( ! [X1: $i,X2: $i,X3: $i] :
                                    ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
                                   => ! [X4: $o] :
                                        ( ( ( X3 = X1 )
                                         => X4 )
                                       => ( ( ( in @ X3 @ X2 )
                                           => X4 )
                                         => X4 ) ) )
                               => ( ! [X1: $i,X2: $i,X3: $i] :
                                      ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
                                     => ( ( X3 != X1 )
                                       => ( in @ X3 @ X2 ) ) )
                                 => ( ! [X1: $i] :
                                        ( ( dsetconstr @ X1
                                          @ ^ [X2: $i] : ~ $false )
                                        = X1 )
                                   => ( ! [X1: $i,X2: $i] :
                                          ( ! [X3: $i] :
                                              ( ( in @ X3 @ X2 )
                                             => ( in @ X3 @ X1 ) )
                                         => ( in @ X2 @ ( powerset @ X1 ) ) )
                                     => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
                                       => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
                                         => ( ! [X1: $i,X2: $i,X3: $i] :
                                                ( ( in @ X2 @ ( powerset @ X1 ) )
                                               => ( ( in @ X3 @ X2 )
                                                 => ( in @ X3 @ X1 ) ) )
                                           => ( ! [X1: $i,X2: $i,X3: $i] :
                                                  ( ( in @ X2 @ X3 )
                                                 => ( ( in @ X3 @ X1 )
                                                   => ( in @ X2 @ ( setunion @ X1 ) ) ) )
                                             => ( ! [X1: $i,X2: $i] :
                                                    ( ( in @ X2 @ ( setunion @ X1 ) )
                                                   => ! [X3: $o] :
                                                        ( ! [X4: $i] :
                                                            ( ( in @ X2 @ X4 )
                                                           => ( ( in @ X4 @ X1 )
                                                             => X3 ) )
                                                       => X3 ) )
                                               => ( ! [X1: $i,X2: $i] :
                                                      ( ( in @ X2 @ X1 )
                                                     => ( in @ X2 @ ( powerset @ ( setunion @ X1 ) ) ) )
                                                 => ( ! [X1: $i > $o] :
                                                        ( ~ ! [X2: $i] :
                                                              ( ( X1 @ X2 )
                                                             => ~ ! [X3: $i] :
                                                                    ( ( X1 @ X3 )
                                                                   => ( X2 = X3 ) ) )
                                                       => ~ ! [X2: $i] :
                                                              ~ ! [X3: $i] :
                                                                  ( ( X1 @ X3 )
                                                                  = ( X3 = X2 ) ) )
                                                   => ( ! [X1: $i] :
                                                          ( ( X1 != emptyset )
                                                         => ~ ! [X2: $i] :
                                                                ~ ( in @ X2 @ X1 ) )
                                                     => ( ! [X1: $i,X2: $i] :
                                                            ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                                           => ( X1 = X2 ) )
                                                       => ( ! [X1: $i,X2: $i] :
                                                              ( ( X1 != X2 )
                                                             => ~ ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                                                         => ( ! [X1: $i,X2: $i] :
                                                                ( ( X1 = X2 )
                                                               => ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                           => ( ! [X1: $i,X2: $i] :
                                                                  ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                                                 => ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                                                             => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                    ( ( in @ X3 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                   => ( ( X3 != X1 )
                                                                     => ( X3 = X2 ) ) )
                                                               => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                 => ( ! [X1: $i,X2: $i] : ( in @ X2 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                   => ( ! [X1: $i,X2: $i > $o] :
                                                                          ( ~ ! [X3: $i] :
                                                                                ( ( in @ X3 @ X1 )
                                                                               => ~ ( X2 @ X3 ) )
                                                                         => ( ( dsetconstr @ X1 @ X2 )
                                                                           != emptyset ) )
                                                                     => ( ! [X1: $i > $o,X2: $i] :
                                                                            ( ( in @ X2 @ emptyset )
                                                                           => ( X1 @ X2 ) )
                                                                       => ( ! [X1: $i,X2: $i > $o] :
                                                                              ( ~ ! [X3: $i] :
                                                                                    ( ( in @ X3 @ X1 )
                                                                                   => ( X2 @ X3 ) )
                                                                             => ~ ! [X3: $i] :
                                                                                    ( ( in @ X3 @ X1 )
                                                                                   => ( X2 @ X3 ) ) )
                                                                         => ( ! [X1: $i,X2: $i > $o] :
                                                                                ( ! [X3: $i] :
                                                                                    ( ( in @ X3 @ X1 )
                                                                                   => ~ ( X2 @ X3 ) )
                                                                               => ! [X3: $i] :
                                                                                    ( ( in @ X3 @ X1 )
                                                                                   => ~ ( X2 @ X3 ) ) )
                                                                           => ( ! [X1: $i,X2: $i > $o] :
                                                                                  ( ! [X3: $i] :
                                                                                      ( ( in @ X3 @ X1 )
                                                                                     => ~ ( X2 @ X3 ) )
                                                                                 => ! [X3: $i] :
                                                                                      ( ( in @ X3 @ X1 )
                                                                                     => ~ ( X2 @ X3 ) ) )
                                                                             => ( ! [X1: $i,X2: $i > $o] :
                                                                                    ( ~ ! [X3: $i] :
                                                                                          ( ( in @ X3 @ X1 )
                                                                                         => ( X2 @ X3 ) )
                                                                                   => ~ ! [X3: $i] :
                                                                                          ( ( in @ X3 @ X1 )
                                                                                         => ( X2 @ X3 ) ) )
                                                                               => ( ! [X1: $o] :
                                                                                      ( X1
                                                                                     => ( in @ emptyset @ ( prop2set @ X1 ) ) )
                                                                                 => ( ! [X1: $o] :
                                                                                        ( X1
                                                                                       => ( set2prop @ ( prop2set @ X1 ) ) )
                                                                                   => ( ! [X1: $i,X2: $i > $o] :
                                                                                          ( ! [X3: $i] :
                                                                                              ( ( in @ X3 @ X1 )
                                                                                             => ~ ( X2 @ X3 ) )
                                                                                         => ! [X3: $i] :
                                                                                              ( ( in @ X3 @ X1 )
                                                                                             => ~ ( X2 @ X3 ) ) )
                                                                                     => ( ! [X1: $i,X2: $i > $o] :
                                                                                            ( ~ ! [X3: $i] :
                                                                                                  ( ( in @ X3 @ X1 )
                                                                                                 => ( X2 @ X3 ) )
                                                                                           => ~ ! [X3: $i] :
                                                                                                  ( ( in @ X3 @ X1 )
                                                                                                 => ( X2 @ X3 ) ) )
                                                                                       => ( ! [X1: $i > $o] :
                                                                                              ( ~ ! [X2: $i] :
                                                                                                    ( ( X1 @ X2 )
                                                                                                   => ~ ! [X3: $i] :
                                                                                                          ( ( X1 @ X3 )
                                                                                                         => ( X2 = X3 ) ) )
                                                                                             => ~ ! [X2: $i] :
                                                                                                    ( ( X1 @ X2 )
                                                                                                   => ~ ! [X3: $i] :
                                                                                                          ( ( X1 @ X3 )
                                                                                                         => ( X2 = X3 ) ) ) )
                                                                                         => ( ! [X1: $i > $o] :
                                                                                                ( ~ ! [X2: $i] :
                                                                                                      ~ ( X1 @ X2 )
                                                                                               => ( ! [X2: $i,X3: $i] :
                                                                                                      ( ( X1 @ X2 )
                                                                                                     => ( ( X1 @ X3 )
                                                                                                       => ( X2 = X3 ) ) )
                                                                                                 => ~ ! [X2: $i] :
                                                                                                        ( ( X1 @ X2 )
                                                                                                       => ~ ! [X3: $i] :
                                                                                                              ( ( X1 @ X3 )
                                                                                                             => ( X2 = X3 ) ) ) ) )
                                                                                           => ! [X1: $i > $o] :
                                                                                                ( ~ ! [X2: $i] :
                                                                                                      ~ ! [X3: $i] :
                                                                                                          ( ( X1 @ X3 )
                                                                                                          = ( X3 = X2 ) )
                                                                                               => ~ ! [X2: $i] :
                                                                                                      ( ( X1 @ X2 )
                                                                                                     => ~ ! [X3: $i] :
                                                                                                            ( ( X1 @ X3 )
                                                                                                           => ( X2 = X3 ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ),
    introduced(assumption,[]) ).

thf(h38,assumption,
    ~ ( ! [X1: $i] :
          ~ ( in @ X1 @ emptyset )
     => ( ! [X1: $i > $o] :
            ( ~ ! [X2: $i] :
                  ( ( X1 @ X2 )
                 => ~ ! [X3: $i] :
                        ( ( X1 @ X3 )
                       => ( X2 = X3 ) ) )
           => ~ ! [X2: $i] :
                  ~ ( X1 @ X2 ) )
       => ( ! [X1: $i,X2: $i] :
              ( ! [X3: $i] :
                  ( ( in @ X3 @ X1 )
                 => ( in @ X3 @ X2 ) )
             => ( ! [X3: $i] :
                    ( ( in @ X3 @ X2 )
                   => ( in @ X3 @ X1 ) )
               => ( X1 = X2 ) ) )
         => ( ! [X1: $i] :
                ( ! [X2: $i] :
                    ~ ( in @ X2 @ X1 )
               => ( X1 = emptyset ) )
           => ( ! [X1: $i] :
                  ( ! [X2: $i] :
                      ~ ( in @ X2 @ X1 )
                 => ( X1 = emptyset ) )
             => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                    ( ( in @ X3 @ X1 )
                   => ( ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) )
                      = ( X2 @ X3 ) ) )
               => ( ! [X1: $i] :
                      ( ( X1 != emptyset )
                     => ~ ! [X2: $i] :
                            ~ ( in @ X2 @ X1 ) )
                 => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                        ( ( in @ X3 @ X1 )
                       => ( ( X2 @ X3 )
                         => ( ( dsetconstr @ X1 @ X2 )
                           != emptyset ) ) )
                   => ( ! [X1: $i] :
                          ( ~ ! [X2: $i] :
                                ~ ( in @ X2 @ X1 )
                         => ( X1 != emptyset ) )
                     => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ X2 ) )
                       => ( ( in @ emptyset @ ( setadjoin @ emptyset @ emptyset ) )
                         => ( ! [X1: $i,X2: $i,X3: $i] :
                                ( ( in @ X3 @ X2 )
                               => ( in @ X3 @ ( setadjoin @ X1 @ X2 ) ) )
                           => ( ! [X1: $i,X2: $i,X3: $i] :
                                  ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
                                 => ! [X4: $o] :
                                      ( ( ( X3 = X1 )
                                       => X4 )
                                     => ( ( ( in @ X3 @ X2 )
                                         => X4 )
                                       => X4 ) ) )
                             => ( ! [X1: $i,X2: $i,X3: $i] :
                                    ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
                                   => ( ( X3 != X1 )
                                     => ( in @ X3 @ X2 ) ) )
                               => ( ! [X1: $i] :
                                      ( ( dsetconstr @ X1
                                        @ ^ [X2: $i] : ~ $false )
                                      = X1 )
                                 => ( ! [X1: $i,X2: $i] :
                                        ( ! [X3: $i] :
                                            ( ( in @ X3 @ X2 )
                                           => ( in @ X3 @ X1 ) )
                                       => ( in @ X2 @ ( powerset @ X1 ) ) )
                                   => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
                                     => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
                                       => ( ! [X1: $i,X2: $i,X3: $i] :
                                              ( ( in @ X2 @ ( powerset @ X1 ) )
                                             => ( ( in @ X3 @ X2 )
                                               => ( in @ X3 @ X1 ) ) )
                                         => ( ! [X1: $i,X2: $i,X3: $i] :
                                                ( ( in @ X2 @ X3 )
                                               => ( ( in @ X3 @ X1 )
                                                 => ( in @ X2 @ ( setunion @ X1 ) ) ) )
                                           => ( ! [X1: $i,X2: $i] :
                                                  ( ( in @ X2 @ ( setunion @ X1 ) )
                                                 => ! [X3: $o] :
                                                      ( ! [X4: $i] :
                                                          ( ( in @ X2 @ X4 )
                                                         => ( ( in @ X4 @ X1 )
                                                           => X3 ) )
                                                     => X3 ) )
                                             => ( ! [X1: $i,X2: $i] :
                                                    ( ( in @ X2 @ X1 )
                                                   => ( in @ X2 @ ( powerset @ ( setunion @ X1 ) ) ) )
                                               => ( ! [X1: $i > $o] :
                                                      ( ~ ! [X2: $i] :
                                                            ( ( X1 @ X2 )
                                                           => ~ ! [X3: $i] :
                                                                  ( ( X1 @ X3 )
                                                                 => ( X2 = X3 ) ) )
                                                     => ~ ! [X2: $i] :
                                                            ~ ! [X3: $i] :
                                                                ( ( X1 @ X3 )
                                                                = ( X3 = X2 ) ) )
                                                 => ( ! [X1: $i] :
                                                        ( ( X1 != emptyset )
                                                       => ~ ! [X2: $i] :
                                                              ~ ( in @ X2 @ X1 ) )
                                                   => ( ! [X1: $i,X2: $i] :
                                                          ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                                         => ( X1 = X2 ) )
                                                     => ( ! [X1: $i,X2: $i] :
                                                            ( ( X1 != X2 )
                                                           => ~ ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                                                       => ( ! [X1: $i,X2: $i] :
                                                              ( ( X1 = X2 )
                                                             => ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                         => ( ! [X1: $i,X2: $i] :
                                                                ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                                               => ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                                                           => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                  ( ( in @ X3 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                 => ( ( X3 != X1 )
                                                                   => ( X3 = X2 ) ) )
                                                             => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                               => ( ! [X1: $i,X2: $i] : ( in @ X2 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                 => ( ! [X1: $i,X2: $i > $o] :
                                                                        ( ~ ! [X3: $i] :
                                                                              ( ( in @ X3 @ X1 )
                                                                             => ~ ( X2 @ X3 ) )
                                                                       => ( ( dsetconstr @ X1 @ X2 )
                                                                         != emptyset ) )
                                                                   => ( ! [X1: $i > $o,X2: $i] :
                                                                          ( ( in @ X2 @ emptyset )
                                                                         => ( X1 @ X2 ) )
                                                                     => ( ! [X1: $i,X2: $i > $o] :
                                                                            ( ~ ! [X3: $i] :
                                                                                  ( ( in @ X3 @ X1 )
                                                                                 => ( X2 @ X3 ) )
                                                                           => ~ ! [X3: $i] :
                                                                                  ( ( in @ X3 @ X1 )
                                                                                 => ( X2 @ X3 ) ) )
                                                                       => ( ! [X1: $i,X2: $i > $o] :
                                                                              ( ! [X3: $i] :
                                                                                  ( ( in @ X3 @ X1 )
                                                                                 => ~ ( X2 @ X3 ) )
                                                                             => ! [X3: $i] :
                                                                                  ( ( in @ X3 @ X1 )
                                                                                 => ~ ( X2 @ X3 ) ) )
                                                                         => ( ! [X1: $i,X2: $i > $o] :
                                                                                ( ! [X3: $i] :
                                                                                    ( ( in @ X3 @ X1 )
                                                                                   => ~ ( X2 @ X3 ) )
                                                                               => ! [X3: $i] :
                                                                                    ( ( in @ X3 @ X1 )
                                                                                   => ~ ( X2 @ X3 ) ) )
                                                                           => ( ! [X1: $i,X2: $i > $o] :
                                                                                  ( ~ ! [X3: $i] :
                                                                                        ( ( in @ X3 @ X1 )
                                                                                       => ( X2 @ X3 ) )
                                                                                 => ~ ! [X3: $i] :
                                                                                        ( ( in @ X3 @ X1 )
                                                                                       => ( X2 @ X3 ) ) )
                                                                             => ( ! [X1: $o] :
                                                                                    ( X1
                                                                                   => ( in @ emptyset @ ( prop2set @ X1 ) ) )
                                                                               => ( ! [X1: $o] :
                                                                                      ( X1
                                                                                     => ( set2prop @ ( prop2set @ X1 ) ) )
                                                                                 => ( ! [X1: $i,X2: $i > $o] :
                                                                                        ( ! [X3: $i] :
                                                                                            ( ( in @ X3 @ X1 )
                                                                                           => ~ ( X2 @ X3 ) )
                                                                                       => ! [X3: $i] :
                                                                                            ( ( in @ X3 @ X1 )
                                                                                           => ~ ( X2 @ X3 ) ) )
                                                                                   => ( ! [X1: $i,X2: $i > $o] :
                                                                                          ( ~ ! [X3: $i] :
                                                                                                ( ( in @ X3 @ X1 )
                                                                                               => ( X2 @ X3 ) )
                                                                                         => ~ ! [X3: $i] :
                                                                                                ( ( in @ X3 @ X1 )
                                                                                               => ( X2 @ X3 ) ) )
                                                                                     => ( ! [X1: $i > $o] :
                                                                                            ( ~ ! [X2: $i] :
                                                                                                  ( ( X1 @ X2 )
                                                                                                 => ~ ! [X3: $i] :
                                                                                                        ( ( X1 @ X3 )
                                                                                                       => ( X2 = X3 ) ) )
                                                                                           => ~ ! [X2: $i] :
                                                                                                  ( ( X1 @ X2 )
                                                                                                 => ~ ! [X3: $i] :
                                                                                                        ( ( X1 @ X3 )
                                                                                                       => ( X2 = X3 ) ) ) )
                                                                                       => ( ! [X1: $i > $o] :
                                                                                              ( ~ ! [X2: $i] :
                                                                                                    ~ ( X1 @ X2 )
                                                                                             => ( ! [X2: $i,X3: $i] :
                                                                                                    ( ( X1 @ X2 )
                                                                                                   => ( ( X1 @ X3 )
                                                                                                     => ( X2 = X3 ) ) )
                                                                                               => ~ ! [X2: $i] :
                                                                                                      ( ( X1 @ X2 )
                                                                                                     => ~ ! [X3: $i] :
                                                                                                            ( ( X1 @ X3 )
                                                                                                           => ( X2 = X3 ) ) ) ) )
                                                                                         => ! [X1: $i > $o] :
                                                                                              ( ~ ! [X2: $i] :
                                                                                                    ~ ! [X3: $i] :
                                                                                                        ( ( X1 @ X3 )
                                                                                                        = ( X3 = X2 ) )
                                                                                             => ~ ! [X2: $i] :
                                                                                                    ( ( X1 @ X2 )
                                                                                                   => ~ ! [X3: $i] :
                                                                                                          ( ( X1 @ X3 )
                                                                                                         => ( X2 = X3 ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ),
    introduced(assumption,[]) ).

thf(h39,assumption,
    ~ ( ! [X1: $i > $o] :
          ( ~ ! [X2: $i] :
                ( ( X1 @ X2 )
               => ~ ! [X3: $i] :
                      ( ( X1 @ X3 )
                     => ( X2 = X3 ) ) )
         => ~ ! [X2: $i] :
                ~ ( X1 @ X2 ) )
     => ( ! [X1: $i,X2: $i] :
            ( ! [X3: $i] :
                ( ( in @ X3 @ X1 )
               => ( in @ X3 @ X2 ) )
           => ( ! [X3: $i] :
                  ( ( in @ X3 @ X2 )
                 => ( in @ X3 @ X1 ) )
             => ( X1 = X2 ) ) )
       => ( ! [X1: $i] :
              ( ! [X2: $i] :
                  ~ ( in @ X2 @ X1 )
             => ( X1 = emptyset ) )
         => ( ! [X1: $i] :
                ( ! [X2: $i] :
                    ~ ( in @ X2 @ X1 )
               => ( X1 = emptyset ) )
           => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                  ( ( in @ X3 @ X1 )
                 => ( ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) )
                    = ( X2 @ X3 ) ) )
             => ( ! [X1: $i] :
                    ( ( X1 != emptyset )
                   => ~ ! [X2: $i] :
                          ~ ( in @ X2 @ X1 ) )
               => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                      ( ( in @ X3 @ X1 )
                     => ( ( X2 @ X3 )
                       => ( ( dsetconstr @ X1 @ X2 )
                         != emptyset ) ) )
                 => ( ! [X1: $i] :
                        ( ~ ! [X2: $i] :
                              ~ ( in @ X2 @ X1 )
                       => ( X1 != emptyset ) )
                   => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ X2 ) )
                     => ( ( in @ emptyset @ ( setadjoin @ emptyset @ emptyset ) )
                       => ( ! [X1: $i,X2: $i,X3: $i] :
                              ( ( in @ X3 @ X2 )
                             => ( in @ X3 @ ( setadjoin @ X1 @ X2 ) ) )
                         => ( ! [X1: $i,X2: $i,X3: $i] :
                                ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
                               => ! [X4: $o] :
                                    ( ( ( X3 = X1 )
                                     => X4 )
                                   => ( ( ( in @ X3 @ X2 )
                                       => X4 )
                                     => X4 ) ) )
                           => ( ! [X1: $i,X2: $i,X3: $i] :
                                  ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
                                 => ( ( X3 != X1 )
                                   => ( in @ X3 @ X2 ) ) )
                             => ( ! [X1: $i] :
                                    ( ( dsetconstr @ X1
                                      @ ^ [X2: $i] : ~ $false )
                                    = X1 )
                               => ( ! [X1: $i,X2: $i] :
                                      ( ! [X3: $i] :
                                          ( ( in @ X3 @ X2 )
                                         => ( in @ X3 @ X1 ) )
                                     => ( in @ X2 @ ( powerset @ X1 ) ) )
                                 => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
                                   => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
                                     => ( ! [X1: $i,X2: $i,X3: $i] :
                                            ( ( in @ X2 @ ( powerset @ X1 ) )
                                           => ( ( in @ X3 @ X2 )
                                             => ( in @ X3 @ X1 ) ) )
                                       => ( ! [X1: $i,X2: $i,X3: $i] :
                                              ( ( in @ X2 @ X3 )
                                             => ( ( in @ X3 @ X1 )
                                               => ( in @ X2 @ ( setunion @ X1 ) ) ) )
                                         => ( ! [X1: $i,X2: $i] :
                                                ( ( in @ X2 @ ( setunion @ X1 ) )
                                               => ! [X3: $o] :
                                                    ( ! [X4: $i] :
                                                        ( ( in @ X2 @ X4 )
                                                       => ( ( in @ X4 @ X1 )
                                                         => X3 ) )
                                                   => X3 ) )
                                           => ( ! [X1: $i,X2: $i] :
                                                  ( ( in @ X2 @ X1 )
                                                 => ( in @ X2 @ ( powerset @ ( setunion @ X1 ) ) ) )
                                             => ( ! [X1: $i > $o] :
                                                    ( ~ ! [X2: $i] :
                                                          ( ( X1 @ X2 )
                                                         => ~ ! [X3: $i] :
                                                                ( ( X1 @ X3 )
                                                               => ( X2 = X3 ) ) )
                                                   => ~ ! [X2: $i] :
                                                          ~ ! [X3: $i] :
                                                              ( ( X1 @ X3 )
                                                              = ( X3 = X2 ) ) )
                                               => ( ! [X1: $i] :
                                                      ( ( X1 != emptyset )
                                                     => ~ ! [X2: $i] :
                                                            ~ ( in @ X2 @ X1 ) )
                                                 => ( ! [X1: $i,X2: $i] :
                                                        ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                                       => ( X1 = X2 ) )
                                                   => ( ! [X1: $i,X2: $i] :
                                                          ( ( X1 != X2 )
                                                         => ~ ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                                                     => ( ! [X1: $i,X2: $i] :
                                                            ( ( X1 = X2 )
                                                           => ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                       => ( ! [X1: $i,X2: $i] :
                                                              ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                                             => ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                                                         => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                ( ( in @ X3 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                               => ( ( X3 != X1 )
                                                                 => ( X3 = X2 ) ) )
                                                           => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                             => ( ! [X1: $i,X2: $i] : ( in @ X2 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                               => ( ! [X1: $i,X2: $i > $o] :
                                                                      ( ~ ! [X3: $i] :
                                                                            ( ( in @ X3 @ X1 )
                                                                           => ~ ( X2 @ X3 ) )
                                                                     => ( ( dsetconstr @ X1 @ X2 )
                                                                       != emptyset ) )
                                                                 => ( ! [X1: $i > $o,X2: $i] :
                                                                        ( ( in @ X2 @ emptyset )
                                                                       => ( X1 @ X2 ) )
                                                                   => ( ! [X1: $i,X2: $i > $o] :
                                                                          ( ~ ! [X3: $i] :
                                                                                ( ( in @ X3 @ X1 )
                                                                               => ( X2 @ X3 ) )
                                                                         => ~ ! [X3: $i] :
                                                                                ( ( in @ X3 @ X1 )
                                                                               => ( X2 @ X3 ) ) )
                                                                     => ( ! [X1: $i,X2: $i > $o] :
                                                                            ( ! [X3: $i] :
                                                                                ( ( in @ X3 @ X1 )
                                                                               => ~ ( X2 @ X3 ) )
                                                                           => ! [X3: $i] :
                                                                                ( ( in @ X3 @ X1 )
                                                                               => ~ ( X2 @ X3 ) ) )
                                                                       => ( ! [X1: $i,X2: $i > $o] :
                                                                              ( ! [X3: $i] :
                                                                                  ( ( in @ X3 @ X1 )
                                                                                 => ~ ( X2 @ X3 ) )
                                                                             => ! [X3: $i] :
                                                                                  ( ( in @ X3 @ X1 )
                                                                                 => ~ ( X2 @ X3 ) ) )
                                                                         => ( ! [X1: $i,X2: $i > $o] :
                                                                                ( ~ ! [X3: $i] :
                                                                                      ( ( in @ X3 @ X1 )
                                                                                     => ( X2 @ X3 ) )
                                                                               => ~ ! [X3: $i] :
                                                                                      ( ( in @ X3 @ X1 )
                                                                                     => ( X2 @ X3 ) ) )
                                                                           => ( ! [X1: $o] :
                                                                                  ( X1
                                                                                 => ( in @ emptyset @ ( prop2set @ X1 ) ) )
                                                                             => ( ! [X1: $o] :
                                                                                    ( X1
                                                                                   => ( set2prop @ ( prop2set @ X1 ) ) )
                                                                               => ( ! [X1: $i,X2: $i > $o] :
                                                                                      ( ! [X3: $i] :
                                                                                          ( ( in @ X3 @ X1 )
                                                                                         => ~ ( X2 @ X3 ) )
                                                                                     => ! [X3: $i] :
                                                                                          ( ( in @ X3 @ X1 )
                                                                                         => ~ ( X2 @ X3 ) ) )
                                                                                 => ( ! [X1: $i,X2: $i > $o] :
                                                                                        ( ~ ! [X3: $i] :
                                                                                              ( ( in @ X3 @ X1 )
                                                                                             => ( X2 @ X3 ) )
                                                                                       => ~ ! [X3: $i] :
                                                                                              ( ( in @ X3 @ X1 )
                                                                                             => ( X2 @ X3 ) ) )
                                                                                   => ( ! [X1: $i > $o] :
                                                                                          ( ~ ! [X2: $i] :
                                                                                                ( ( X1 @ X2 )
                                                                                               => ~ ! [X3: $i] :
                                                                                                      ( ( X1 @ X3 )
                                                                                                     => ( X2 = X3 ) ) )
                                                                                         => ~ ! [X2: $i] :
                                                                                                ( ( X1 @ X2 )
                                                                                               => ~ ! [X3: $i] :
                                                                                                      ( ( X1 @ X3 )
                                                                                                     => ( X2 = X3 ) ) ) )
                                                                                     => ( ! [X1: $i > $o] :
                                                                                            ( ~ ! [X2: $i] :
                                                                                                  ~ ( X1 @ X2 )
                                                                                           => ( ! [X2: $i,X3: $i] :
                                                                                                  ( ( X1 @ X2 )
                                                                                                 => ( ( X1 @ X3 )
                                                                                                   => ( X2 = X3 ) ) )
                                                                                             => ~ ! [X2: $i] :
                                                                                                    ( ( X1 @ X2 )
                                                                                                   => ~ ! [X3: $i] :
                                                                                                          ( ( X1 @ X3 )
                                                                                                         => ( X2 = X3 ) ) ) ) )
                                                                                       => ! [X1: $i > $o] :
                                                                                            ( ~ ! [X2: $i] :
                                                                                                  ~ ! [X3: $i] :
                                                                                                      ( ( X1 @ X3 )
                                                                                                      = ( X3 = X2 ) )
                                                                                           => ~ ! [X2: $i] :
                                                                                                  ( ( X1 @ X2 )
                                                                                                 => ~ ! [X3: $i] :
                                                                                                        ( ( X1 @ X3 )
                                                                                                       => ( X2 = X3 ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ),
    introduced(assumption,[]) ).

thf(h40,assumption,
    ! [X1: $i > $o] :
      ( ~ ! [X2: $i] :
            ( ( X1 @ X2 )
           => ~ ! [X3: $i] :
                  ( ( X1 @ X3 )
                 => ( X2 = X3 ) ) )
     => ~ ! [X2: $i] :
            ~ ( X1 @ X2 ) ),
    introduced(assumption,[]) ).

thf(h41,assumption,
    ~ ( ! [X1: $i,X2: $i] :
          ( ! [X3: $i] :
              ( ( in @ X3 @ X1 )
             => ( in @ X3 @ X2 ) )
         => ( ! [X3: $i] :
                ( ( in @ X3 @ X2 )
               => ( in @ X3 @ X1 ) )
           => ( X1 = X2 ) ) )
     => ( ! [X1: $i] :
            ( ! [X2: $i] :
                ~ ( in @ X2 @ X1 )
           => ( X1 = emptyset ) )
       => ( ! [X1: $i] :
              ( ! [X2: $i] :
                  ~ ( in @ X2 @ X1 )
             => ( X1 = emptyset ) )
         => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                ( ( in @ X3 @ X1 )
               => ( ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) )
                  = ( X2 @ X3 ) ) )
           => ( ! [X1: $i] :
                  ( ( X1 != emptyset )
                 => ~ ! [X2: $i] :
                        ~ ( in @ X2 @ X1 ) )
             => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                    ( ( in @ X3 @ X1 )
                   => ( ( X2 @ X3 )
                     => ( ( dsetconstr @ X1 @ X2 )
                       != emptyset ) ) )
               => ( ! [X1: $i] :
                      ( ~ ! [X2: $i] :
                            ~ ( in @ X2 @ X1 )
                     => ( X1 != emptyset ) )
                 => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ X2 ) )
                   => ( ( in @ emptyset @ ( setadjoin @ emptyset @ emptyset ) )
                     => ( ! [X1: $i,X2: $i,X3: $i] :
                            ( ( in @ X3 @ X2 )
                           => ( in @ X3 @ ( setadjoin @ X1 @ X2 ) ) )
                       => ( ! [X1: $i,X2: $i,X3: $i] :
                              ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
                             => ! [X4: $o] :
                                  ( ( ( X3 = X1 )
                                   => X4 )
                                 => ( ( ( in @ X3 @ X2 )
                                     => X4 )
                                   => X4 ) ) )
                         => ( ! [X1: $i,X2: $i,X3: $i] :
                                ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
                               => ( ( X3 != X1 )
                                 => ( in @ X3 @ X2 ) ) )
                           => ( ! [X1: $i] :
                                  ( ( dsetconstr @ X1
                                    @ ^ [X2: $i] : ~ $false )
                                  = X1 )
                             => ( ! [X1: $i,X2: $i] :
                                    ( ! [X3: $i] :
                                        ( ( in @ X3 @ X2 )
                                       => ( in @ X3 @ X1 ) )
                                   => ( in @ X2 @ ( powerset @ X1 ) ) )
                               => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
                                 => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
                                   => ( ! [X1: $i,X2: $i,X3: $i] :
                                          ( ( in @ X2 @ ( powerset @ X1 ) )
                                         => ( ( in @ X3 @ X2 )
                                           => ( in @ X3 @ X1 ) ) )
                                     => ( ! [X1: $i,X2: $i,X3: $i] :
                                            ( ( in @ X2 @ X3 )
                                           => ( ( in @ X3 @ X1 )
                                             => ( in @ X2 @ ( setunion @ X1 ) ) ) )
                                       => ( ! [X1: $i,X2: $i] :
                                              ( ( in @ X2 @ ( setunion @ X1 ) )
                                             => ! [X3: $o] :
                                                  ( ! [X4: $i] :
                                                      ( ( in @ X2 @ X4 )
                                                     => ( ( in @ X4 @ X1 )
                                                       => X3 ) )
                                                 => X3 ) )
                                         => ( ! [X1: $i,X2: $i] :
                                                ( ( in @ X2 @ X1 )
                                               => ( in @ X2 @ ( powerset @ ( setunion @ X1 ) ) ) )
                                           => ( ! [X1: $i > $o] :
                                                  ( ~ ! [X2: $i] :
                                                        ( ( X1 @ X2 )
                                                       => ~ ! [X3: $i] :
                                                              ( ( X1 @ X3 )
                                                             => ( X2 = X3 ) ) )
                                                 => ~ ! [X2: $i] :
                                                        ~ ! [X3: $i] :
                                                            ( ( X1 @ X3 )
                                                            = ( X3 = X2 ) ) )
                                             => ( ! [X1: $i] :
                                                    ( ( X1 != emptyset )
                                                   => ~ ! [X2: $i] :
                                                          ~ ( in @ X2 @ X1 ) )
                                               => ( ! [X1: $i,X2: $i] :
                                                      ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                                     => ( X1 = X2 ) )
                                                 => ( ! [X1: $i,X2: $i] :
                                                        ( ( X1 != X2 )
                                                       => ~ ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                                                   => ( ! [X1: $i,X2: $i] :
                                                          ( ( X1 = X2 )
                                                         => ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                     => ( ! [X1: $i,X2: $i] :
                                                            ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                                           => ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                                                       => ( ! [X1: $i,X2: $i,X3: $i] :
                                                              ( ( in @ X3 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                             => ( ( X3 != X1 )
                                                               => ( X3 = X2 ) ) )
                                                         => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                           => ( ! [X1: $i,X2: $i] : ( in @ X2 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                             => ( ! [X1: $i,X2: $i > $o] :
                                                                    ( ~ ! [X3: $i] :
                                                                          ( ( in @ X3 @ X1 )
                                                                         => ~ ( X2 @ X3 ) )
                                                                   => ( ( dsetconstr @ X1 @ X2 )
                                                                     != emptyset ) )
                                                               => ( ! [X1: $i > $o,X2: $i] :
                                                                      ( ( in @ X2 @ emptyset )
                                                                     => ( X1 @ X2 ) )
                                                                 => ( ! [X1: $i,X2: $i > $o] :
                                                                        ( ~ ! [X3: $i] :
                                                                              ( ( in @ X3 @ X1 )
                                                                             => ( X2 @ X3 ) )
                                                                       => ~ ! [X3: $i] :
                                                                              ( ( in @ X3 @ X1 )
                                                                             => ( X2 @ X3 ) ) )
                                                                   => ( ! [X1: $i,X2: $i > $o] :
                                                                          ( ! [X3: $i] :
                                                                              ( ( in @ X3 @ X1 )
                                                                             => ~ ( X2 @ X3 ) )
                                                                         => ! [X3: $i] :
                                                                              ( ( in @ X3 @ X1 )
                                                                             => ~ ( X2 @ X3 ) ) )
                                                                     => ( ! [X1: $i,X2: $i > $o] :
                                                                            ( ! [X3: $i] :
                                                                                ( ( in @ X3 @ X1 )
                                                                               => ~ ( X2 @ X3 ) )
                                                                           => ! [X3: $i] :
                                                                                ( ( in @ X3 @ X1 )
                                                                               => ~ ( X2 @ X3 ) ) )
                                                                       => ( ! [X1: $i,X2: $i > $o] :
                                                                              ( ~ ! [X3: $i] :
                                                                                    ( ( in @ X3 @ X1 )
                                                                                   => ( X2 @ X3 ) )
                                                                             => ~ ! [X3: $i] :
                                                                                    ( ( in @ X3 @ X1 )
                                                                                   => ( X2 @ X3 ) ) )
                                                                         => ( ! [X1: $o] :
                                                                                ( X1
                                                                               => ( in @ emptyset @ ( prop2set @ X1 ) ) )
                                                                           => ( ! [X1: $o] :
                                                                                  ( X1
                                                                                 => ( set2prop @ ( prop2set @ X1 ) ) )
                                                                             => ( ! [X1: $i,X2: $i > $o] :
                                                                                    ( ! [X3: $i] :
                                                                                        ( ( in @ X3 @ X1 )
                                                                                       => ~ ( X2 @ X3 ) )
                                                                                   => ! [X3: $i] :
                                                                                        ( ( in @ X3 @ X1 )
                                                                                       => ~ ( X2 @ X3 ) ) )
                                                                               => ( ! [X1: $i,X2: $i > $o] :
                                                                                      ( ~ ! [X3: $i] :
                                                                                            ( ( in @ X3 @ X1 )
                                                                                           => ( X2 @ X3 ) )
                                                                                     => ~ ! [X3: $i] :
                                                                                            ( ( in @ X3 @ X1 )
                                                                                           => ( X2 @ X3 ) ) )
                                                                                 => ( ! [X1: $i > $o] :
                                                                                        ( ~ ! [X2: $i] :
                                                                                              ( ( X1 @ X2 )
                                                                                             => ~ ! [X3: $i] :
                                                                                                    ( ( X1 @ X3 )
                                                                                                   => ( X2 = X3 ) ) )
                                                                                       => ~ ! [X2: $i] :
                                                                                              ( ( X1 @ X2 )
                                                                                             => ~ ! [X3: $i] :
                                                                                                    ( ( X1 @ X3 )
                                                                                                   => ( X2 = X3 ) ) ) )
                                                                                   => ( ! [X1: $i > $o] :
                                                                                          ( ~ ! [X2: $i] :
                                                                                                ~ ( X1 @ X2 )
                                                                                         => ( ! [X2: $i,X3: $i] :
                                                                                                ( ( X1 @ X2 )
                                                                                               => ( ( X1 @ X3 )
                                                                                                 => ( X2 = X3 ) ) )
                                                                                           => ~ ! [X2: $i] :
                                                                                                  ( ( X1 @ X2 )
                                                                                                 => ~ ! [X3: $i] :
                                                                                                        ( ( X1 @ X3 )
                                                                                                       => ( X2 = X3 ) ) ) ) )
                                                                                     => ! [X1: $i > $o] :
                                                                                          ( ~ ! [X2: $i] :
                                                                                                ~ ! [X3: $i] :
                                                                                                    ( ( X1 @ X3 )
                                                                                                    = ( X3 = X2 ) )
                                                                                         => ~ ! [X2: $i] :
                                                                                                ( ( X1 @ X2 )
                                                                                               => ~ ! [X3: $i] :
                                                                                                      ( ( X1 @ X3 )
                                                                                                     => ( X2 = X3 ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ),
    introduced(assumption,[]) ).

thf(h42,assumption,
    ! [X1: $i,X2: $i] :
      ( ! [X3: $i] :
          ( ( in @ X3 @ X1 )
         => ( in @ X3 @ X2 ) )
     => ( ! [X3: $i] :
            ( ( in @ X3 @ X2 )
           => ( in @ X3 @ X1 ) )
       => ( X1 = X2 ) ) ),
    introduced(assumption,[]) ).

thf(h43,assumption,
    ~ ( ! [X1: $i] :
          ( ! [X2: $i] :
              ~ ( in @ X2 @ X1 )
         => ( X1 = emptyset ) )
     => ( ! [X1: $i] :
            ( ! [X2: $i] :
                ~ ( in @ X2 @ X1 )
           => ( X1 = emptyset ) )
       => ( ! [X1: $i,X2: $i > $o,X3: $i] :
              ( ( in @ X3 @ X1 )
             => ( ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) )
                = ( X2 @ X3 ) ) )
         => ( ! [X1: $i] :
                ( ( X1 != emptyset )
               => ~ ! [X2: $i] :
                      ~ ( in @ X2 @ X1 ) )
           => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                  ( ( in @ X3 @ X1 )
                 => ( ( X2 @ X3 )
                   => ( ( dsetconstr @ X1 @ X2 )
                     != emptyset ) ) )
             => ( ! [X1: $i] :
                    ( ~ ! [X2: $i] :
                          ~ ( in @ X2 @ X1 )
                   => ( X1 != emptyset ) )
               => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ X2 ) )
                 => ( ( in @ emptyset @ ( setadjoin @ emptyset @ emptyset ) )
                   => ( ! [X1: $i,X2: $i,X3: $i] :
                          ( ( in @ X3 @ X2 )
                         => ( in @ X3 @ ( setadjoin @ X1 @ X2 ) ) )
                     => ( ! [X1: $i,X2: $i,X3: $i] :
                            ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
                           => ! [X4: $o] :
                                ( ( ( X3 = X1 )
                                 => X4 )
                               => ( ( ( in @ X3 @ X2 )
                                   => X4 )
                                 => X4 ) ) )
                       => ( ! [X1: $i,X2: $i,X3: $i] :
                              ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
                             => ( ( X3 != X1 )
                               => ( in @ X3 @ X2 ) ) )
                         => ( ! [X1: $i] :
                                ( ( dsetconstr @ X1
                                  @ ^ [X2: $i] : ~ $false )
                                = X1 )
                           => ( ! [X1: $i,X2: $i] :
                                  ( ! [X3: $i] :
                                      ( ( in @ X3 @ X2 )
                                     => ( in @ X3 @ X1 ) )
                                 => ( in @ X2 @ ( powerset @ X1 ) ) )
                             => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
                               => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
                                 => ( ! [X1: $i,X2: $i,X3: $i] :
                                        ( ( in @ X2 @ ( powerset @ X1 ) )
                                       => ( ( in @ X3 @ X2 )
                                         => ( in @ X3 @ X1 ) ) )
                                   => ( ! [X1: $i,X2: $i,X3: $i] :
                                          ( ( in @ X2 @ X3 )
                                         => ( ( in @ X3 @ X1 )
                                           => ( in @ X2 @ ( setunion @ X1 ) ) ) )
                                     => ( ! [X1: $i,X2: $i] :
                                            ( ( in @ X2 @ ( setunion @ X1 ) )
                                           => ! [X3: $o] :
                                                ( ! [X4: $i] :
                                                    ( ( in @ X2 @ X4 )
                                                   => ( ( in @ X4 @ X1 )
                                                     => X3 ) )
                                               => X3 ) )
                                       => ( ! [X1: $i,X2: $i] :
                                              ( ( in @ X2 @ X1 )
                                             => ( in @ X2 @ ( powerset @ ( setunion @ X1 ) ) ) )
                                         => ( ! [X1: $i > $o] :
                                                ( ~ ! [X2: $i] :
                                                      ( ( X1 @ X2 )
                                                     => ~ ! [X3: $i] :
                                                            ( ( X1 @ X3 )
                                                           => ( X2 = X3 ) ) )
                                               => ~ ! [X2: $i] :
                                                      ~ ! [X3: $i] :
                                                          ( ( X1 @ X3 )
                                                          = ( X3 = X2 ) ) )
                                           => ( ! [X1: $i] :
                                                  ( ( X1 != emptyset )
                                                 => ~ ! [X2: $i] :
                                                        ~ ( in @ X2 @ X1 ) )
                                             => ( ! [X1: $i,X2: $i] :
                                                    ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                                   => ( X1 = X2 ) )
                                               => ( ! [X1: $i,X2: $i] :
                                                      ( ( X1 != X2 )
                                                     => ~ ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                                                 => ( ! [X1: $i,X2: $i] :
                                                        ( ( X1 = X2 )
                                                       => ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                   => ( ! [X1: $i,X2: $i] :
                                                          ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                                         => ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                                                     => ( ! [X1: $i,X2: $i,X3: $i] :
                                                            ( ( in @ X3 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                           => ( ( X3 != X1 )
                                                             => ( X3 = X2 ) ) )
                                                       => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                         => ( ! [X1: $i,X2: $i] : ( in @ X2 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                           => ( ! [X1: $i,X2: $i > $o] :
                                                                  ( ~ ! [X3: $i] :
                                                                        ( ( in @ X3 @ X1 )
                                                                       => ~ ( X2 @ X3 ) )
                                                                 => ( ( dsetconstr @ X1 @ X2 )
                                                                   != emptyset ) )
                                                             => ( ! [X1: $i > $o,X2: $i] :
                                                                    ( ( in @ X2 @ emptyset )
                                                                   => ( X1 @ X2 ) )
                                                               => ( ! [X1: $i,X2: $i > $o] :
                                                                      ( ~ ! [X3: $i] :
                                                                            ( ( in @ X3 @ X1 )
                                                                           => ( X2 @ X3 ) )
                                                                     => ~ ! [X3: $i] :
                                                                            ( ( in @ X3 @ X1 )
                                                                           => ( X2 @ X3 ) ) )
                                                                 => ( ! [X1: $i,X2: $i > $o] :
                                                                        ( ! [X3: $i] :
                                                                            ( ( in @ X3 @ X1 )
                                                                           => ~ ( X2 @ X3 ) )
                                                                       => ! [X3: $i] :
                                                                            ( ( in @ X3 @ X1 )
                                                                           => ~ ( X2 @ X3 ) ) )
                                                                   => ( ! [X1: $i,X2: $i > $o] :
                                                                          ( ! [X3: $i] :
                                                                              ( ( in @ X3 @ X1 )
                                                                             => ~ ( X2 @ X3 ) )
                                                                         => ! [X3: $i] :
                                                                              ( ( in @ X3 @ X1 )
                                                                             => ~ ( X2 @ X3 ) ) )
                                                                     => ( ! [X1: $i,X2: $i > $o] :
                                                                            ( ~ ! [X3: $i] :
                                                                                  ( ( in @ X3 @ X1 )
                                                                                 => ( X2 @ X3 ) )
                                                                           => ~ ! [X3: $i] :
                                                                                  ( ( in @ X3 @ X1 )
                                                                                 => ( X2 @ X3 ) ) )
                                                                       => ( ! [X1: $o] :
                                                                              ( X1
                                                                             => ( in @ emptyset @ ( prop2set @ X1 ) ) )
                                                                         => ( ! [X1: $o] :
                                                                                ( X1
                                                                               => ( set2prop @ ( prop2set @ X1 ) ) )
                                                                           => ( ! [X1: $i,X2: $i > $o] :
                                                                                  ( ! [X3: $i] :
                                                                                      ( ( in @ X3 @ X1 )
                                                                                     => ~ ( X2 @ X3 ) )
                                                                                 => ! [X3: $i] :
                                                                                      ( ( in @ X3 @ X1 )
                                                                                     => ~ ( X2 @ X3 ) ) )
                                                                             => ( ! [X1: $i,X2: $i > $o] :
                                                                                    ( ~ ! [X3: $i] :
                                                                                          ( ( in @ X3 @ X1 )
                                                                                         => ( X2 @ X3 ) )
                                                                                   => ~ ! [X3: $i] :
                                                                                          ( ( in @ X3 @ X1 )
                                                                                         => ( X2 @ X3 ) ) )
                                                                               => ( ! [X1: $i > $o] :
                                                                                      ( ~ ! [X2: $i] :
                                                                                            ( ( X1 @ X2 )
                                                                                           => ~ ! [X3: $i] :
                                                                                                  ( ( X1 @ X3 )
                                                                                                 => ( X2 = X3 ) ) )
                                                                                     => ~ ! [X2: $i] :
                                                                                            ( ( X1 @ X2 )
                                                                                           => ~ ! [X3: $i] :
                                                                                                  ( ( X1 @ X3 )
                                                                                                 => ( X2 = X3 ) ) ) )
                                                                                 => ( ! [X1: $i > $o] :
                                                                                        ( ~ ! [X2: $i] :
                                                                                              ~ ( X1 @ X2 )
                                                                                       => ( ! [X2: $i,X3: $i] :
                                                                                              ( ( X1 @ X2 )
                                                                                             => ( ( X1 @ X3 )
                                                                                               => ( X2 = X3 ) ) )
                                                                                         => ~ ! [X2: $i] :
                                                                                                ( ( X1 @ X2 )
                                                                                               => ~ ! [X3: $i] :
                                                                                                      ( ( X1 @ X3 )
                                                                                                     => ( X2 = X3 ) ) ) ) )
                                                                                   => ! [X1: $i > $o] :
                                                                                        ( ~ ! [X2: $i] :
                                                                                              ~ ! [X3: $i] :
                                                                                                  ( ( X1 @ X3 )
                                                                                                  = ( X3 = X2 ) )
                                                                                       => ~ ! [X2: $i] :
                                                                                              ( ( X1 @ X2 )
                                                                                             => ~ ! [X3: $i] :
                                                                                                    ( ( X1 @ X3 )
                                                                                                   => ( X2 = X3 ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ),
    introduced(assumption,[]) ).

thf(h44,assumption,
    ! [X1: $i] :
      ( ! [X2: $i] :
          ~ ( in @ X2 @ X1 )
     => ( X1 = emptyset ) ),
    introduced(assumption,[]) ).

thf(h45,assumption,
    ~ ( ! [X1: $i] :
          ( ! [X2: $i] :
              ~ ( in @ X2 @ X1 )
         => ( X1 = emptyset ) )
     => ( ! [X1: $i,X2: $i > $o,X3: $i] :
            ( ( in @ X3 @ X1 )
           => ( ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) )
              = ( X2 @ X3 ) ) )
       => ( ! [X1: $i] :
              ( ( X1 != emptyset )
             => ~ ! [X2: $i] :
                    ~ ( in @ X2 @ X1 ) )
         => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                ( ( in @ X3 @ X1 )
               => ( ( X2 @ X3 )
                 => ( ( dsetconstr @ X1 @ X2 )
                   != emptyset ) ) )
           => ( ! [X1: $i] :
                  ( ~ ! [X2: $i] :
                        ~ ( in @ X2 @ X1 )
                 => ( X1 != emptyset ) )
             => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ X2 ) )
               => ( ( in @ emptyset @ ( setadjoin @ emptyset @ emptyset ) )
                 => ( ! [X1: $i,X2: $i,X3: $i] :
                        ( ( in @ X3 @ X2 )
                       => ( in @ X3 @ ( setadjoin @ X1 @ X2 ) ) )
                   => ( ! [X1: $i,X2: $i,X3: $i] :
                          ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
                         => ! [X4: $o] :
                              ( ( ( X3 = X1 )
                               => X4 )
                             => ( ( ( in @ X3 @ X2 )
                                 => X4 )
                               => X4 ) ) )
                     => ( ! [X1: $i,X2: $i,X3: $i] :
                            ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
                           => ( ( X3 != X1 )
                             => ( in @ X3 @ X2 ) ) )
                       => ( ! [X1: $i] :
                              ( ( dsetconstr @ X1
                                @ ^ [X2: $i] : ~ $false )
                              = X1 )
                         => ( ! [X1: $i,X2: $i] :
                                ( ! [X3: $i] :
                                    ( ( in @ X3 @ X2 )
                                   => ( in @ X3 @ X1 ) )
                               => ( in @ X2 @ ( powerset @ X1 ) ) )
                           => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
                             => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
                               => ( ! [X1: $i,X2: $i,X3: $i] :
                                      ( ( in @ X2 @ ( powerset @ X1 ) )
                                     => ( ( in @ X3 @ X2 )
                                       => ( in @ X3 @ X1 ) ) )
                                 => ( ! [X1: $i,X2: $i,X3: $i] :
                                        ( ( in @ X2 @ X3 )
                                       => ( ( in @ X3 @ X1 )
                                         => ( in @ X2 @ ( setunion @ X1 ) ) ) )
                                   => ( ! [X1: $i,X2: $i] :
                                          ( ( in @ X2 @ ( setunion @ X1 ) )
                                         => ! [X3: $o] :
                                              ( ! [X4: $i] :
                                                  ( ( in @ X2 @ X4 )
                                                 => ( ( in @ X4 @ X1 )
                                                   => X3 ) )
                                             => X3 ) )
                                     => ( ! [X1: $i,X2: $i] :
                                            ( ( in @ X2 @ X1 )
                                           => ( in @ X2 @ ( powerset @ ( setunion @ X1 ) ) ) )
                                       => ( ! [X1: $i > $o] :
                                              ( ~ ! [X2: $i] :
                                                    ( ( X1 @ X2 )
                                                   => ~ ! [X3: $i] :
                                                          ( ( X1 @ X3 )
                                                         => ( X2 = X3 ) ) )
                                             => ~ ! [X2: $i] :
                                                    ~ ! [X3: $i] :
                                                        ( ( X1 @ X3 )
                                                        = ( X3 = X2 ) ) )
                                         => ( ! [X1: $i] :
                                                ( ( X1 != emptyset )
                                               => ~ ! [X2: $i] :
                                                      ~ ( in @ X2 @ X1 ) )
                                           => ( ! [X1: $i,X2: $i] :
                                                  ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                                 => ( X1 = X2 ) )
                                             => ( ! [X1: $i,X2: $i] :
                                                    ( ( X1 != X2 )
                                                   => ~ ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                                               => ( ! [X1: $i,X2: $i] :
                                                      ( ( X1 = X2 )
                                                     => ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                 => ( ! [X1: $i,X2: $i] :
                                                        ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                                       => ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                                                   => ( ! [X1: $i,X2: $i,X3: $i] :
                                                          ( ( in @ X3 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                         => ( ( X3 != X1 )
                                                           => ( X3 = X2 ) ) )
                                                     => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                       => ( ! [X1: $i,X2: $i] : ( in @ X2 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                         => ( ! [X1: $i,X2: $i > $o] :
                                                                ( ~ ! [X3: $i] :
                                                                      ( ( in @ X3 @ X1 )
                                                                     => ~ ( X2 @ X3 ) )
                                                               => ( ( dsetconstr @ X1 @ X2 )
                                                                 != emptyset ) )
                                                           => ( ! [X1: $i > $o,X2: $i] :
                                                                  ( ( in @ X2 @ emptyset )
                                                                 => ( X1 @ X2 ) )
                                                             => ( ! [X1: $i,X2: $i > $o] :
                                                                    ( ~ ! [X3: $i] :
                                                                          ( ( in @ X3 @ X1 )
                                                                         => ( X2 @ X3 ) )
                                                                   => ~ ! [X3: $i] :
                                                                          ( ( in @ X3 @ X1 )
                                                                         => ( X2 @ X3 ) ) )
                                                               => ( ! [X1: $i,X2: $i > $o] :
                                                                      ( ! [X3: $i] :
                                                                          ( ( in @ X3 @ X1 )
                                                                         => ~ ( X2 @ X3 ) )
                                                                     => ! [X3: $i] :
                                                                          ( ( in @ X3 @ X1 )
                                                                         => ~ ( X2 @ X3 ) ) )
                                                                 => ( ! [X1: $i,X2: $i > $o] :
                                                                        ( ! [X3: $i] :
                                                                            ( ( in @ X3 @ X1 )
                                                                           => ~ ( X2 @ X3 ) )
                                                                       => ! [X3: $i] :
                                                                            ( ( in @ X3 @ X1 )
                                                                           => ~ ( X2 @ X3 ) ) )
                                                                   => ( ! [X1: $i,X2: $i > $o] :
                                                                          ( ~ ! [X3: $i] :
                                                                                ( ( in @ X3 @ X1 )
                                                                               => ( X2 @ X3 ) )
                                                                         => ~ ! [X3: $i] :
                                                                                ( ( in @ X3 @ X1 )
                                                                               => ( X2 @ X3 ) ) )
                                                                     => ( ! [X1: $o] :
                                                                            ( X1
                                                                           => ( in @ emptyset @ ( prop2set @ X1 ) ) )
                                                                       => ( ! [X1: $o] :
                                                                              ( X1
                                                                             => ( set2prop @ ( prop2set @ X1 ) ) )
                                                                         => ( ! [X1: $i,X2: $i > $o] :
                                                                                ( ! [X3: $i] :
                                                                                    ( ( in @ X3 @ X1 )
                                                                                   => ~ ( X2 @ X3 ) )
                                                                               => ! [X3: $i] :
                                                                                    ( ( in @ X3 @ X1 )
                                                                                   => ~ ( X2 @ X3 ) ) )
                                                                           => ( ! [X1: $i,X2: $i > $o] :
                                                                                  ( ~ ! [X3: $i] :
                                                                                        ( ( in @ X3 @ X1 )
                                                                                       => ( X2 @ X3 ) )
                                                                                 => ~ ! [X3: $i] :
                                                                                        ( ( in @ X3 @ X1 )
                                                                                       => ( X2 @ X3 ) ) )
                                                                             => ( ! [X1: $i > $o] :
                                                                                    ( ~ ! [X2: $i] :
                                                                                          ( ( X1 @ X2 )
                                                                                         => ~ ! [X3: $i] :
                                                                                                ( ( X1 @ X3 )
                                                                                               => ( X2 = X3 ) ) )
                                                                                   => ~ ! [X2: $i] :
                                                                                          ( ( X1 @ X2 )
                                                                                         => ~ ! [X3: $i] :
                                                                                                ( ( X1 @ X3 )
                                                                                               => ( X2 = X3 ) ) ) )
                                                                               => ( ! [X1: $i > $o] :
                                                                                      ( ~ ! [X2: $i] :
                                                                                            ~ ( X1 @ X2 )
                                                                                     => ( ! [X2: $i,X3: $i] :
                                                                                            ( ( X1 @ X2 )
                                                                                           => ( ( X1 @ X3 )
                                                                                             => ( X2 = X3 ) ) )
                                                                                       => ~ ! [X2: $i] :
                                                                                              ( ( X1 @ X2 )
                                                                                             => ~ ! [X3: $i] :
                                                                                                    ( ( X1 @ X3 )
                                                                                                   => ( X2 = X3 ) ) ) ) )
                                                                                 => ! [X1: $i > $o] :
                                                                                      ( ~ ! [X2: $i] :
                                                                                            ~ ! [X3: $i] :
                                                                                                ( ( X1 @ X3 )
                                                                                                = ( X3 = X2 ) )
                                                                                     => ~ ! [X2: $i] :
                                                                                            ( ( X1 @ X2 )
                                                                                           => ~ ! [X3: $i] :
                                                                                                  ( ( X1 @ X3 )
                                                                                                 => ( X2 = X3 ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ),
    introduced(assumption,[]) ).

thf(h46,assumption,
    ~ ( ! [X1: $i,X2: $i > $o,X3: $i] :
          ( ( in @ X3 @ X1 )
         => ( ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) )
            = ( X2 @ X3 ) ) )
     => ( ! [X1: $i] :
            ( ( X1 != emptyset )
           => ~ ! [X2: $i] :
                  ~ ( in @ X2 @ X1 ) )
       => ( ! [X1: $i,X2: $i > $o,X3: $i] :
              ( ( in @ X3 @ X1 )
             => ( ( X2 @ X3 )
               => ( ( dsetconstr @ X1 @ X2 )
                 != emptyset ) ) )
         => ( ! [X1: $i] :
                ( ~ ! [X2: $i] :
                      ~ ( in @ X2 @ X1 )
               => ( X1 != emptyset ) )
           => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ X2 ) )
             => ( ( in @ emptyset @ ( setadjoin @ emptyset @ emptyset ) )
               => ( ! [X1: $i,X2: $i,X3: $i] :
                      ( ( in @ X3 @ X2 )
                     => ( in @ X3 @ ( setadjoin @ X1 @ X2 ) ) )
                 => ( ! [X1: $i,X2: $i,X3: $i] :
                        ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
                       => ! [X4: $o] :
                            ( ( ( X3 = X1 )
                             => X4 )
                           => ( ( ( in @ X3 @ X2 )
                               => X4 )
                             => X4 ) ) )
                   => ( ! [X1: $i,X2: $i,X3: $i] :
                          ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
                         => ( ( X3 != X1 )
                           => ( in @ X3 @ X2 ) ) )
                     => ( ! [X1: $i] :
                            ( ( dsetconstr @ X1
                              @ ^ [X2: $i] : ~ $false )
                            = X1 )
                       => ( ! [X1: $i,X2: $i] :
                              ( ! [X3: $i] :
                                  ( ( in @ X3 @ X2 )
                                 => ( in @ X3 @ X1 ) )
                             => ( in @ X2 @ ( powerset @ X1 ) ) )
                         => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
                           => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
                             => ( ! [X1: $i,X2: $i,X3: $i] :
                                    ( ( in @ X2 @ ( powerset @ X1 ) )
                                   => ( ( in @ X3 @ X2 )
                                     => ( in @ X3 @ X1 ) ) )
                               => ( ! [X1: $i,X2: $i,X3: $i] :
                                      ( ( in @ X2 @ X3 )
                                     => ( ( in @ X3 @ X1 )
                                       => ( in @ X2 @ ( setunion @ X1 ) ) ) )
                                 => ( ! [X1: $i,X2: $i] :
                                        ( ( in @ X2 @ ( setunion @ X1 ) )
                                       => ! [X3: $o] :
                                            ( ! [X4: $i] :
                                                ( ( in @ X2 @ X4 )
                                               => ( ( in @ X4 @ X1 )
                                                 => X3 ) )
                                           => X3 ) )
                                   => ( ! [X1: $i,X2: $i] :
                                          ( ( in @ X2 @ X1 )
                                         => ( in @ X2 @ ( powerset @ ( setunion @ X1 ) ) ) )
                                     => ( ! [X1: $i > $o] :
                                            ( ~ ! [X2: $i] :
                                                  ( ( X1 @ X2 )
                                                 => ~ ! [X3: $i] :
                                                        ( ( X1 @ X3 )
                                                       => ( X2 = X3 ) ) )
                                           => ~ ! [X2: $i] :
                                                  ~ ! [X3: $i] :
                                                      ( ( X1 @ X3 )
                                                      = ( X3 = X2 ) ) )
                                       => ( ! [X1: $i] :
                                              ( ( X1 != emptyset )
                                             => ~ ! [X2: $i] :
                                                    ~ ( in @ X2 @ X1 ) )
                                         => ( ! [X1: $i,X2: $i] :
                                                ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                               => ( X1 = X2 ) )
                                           => ( ! [X1: $i,X2: $i] :
                                                  ( ( X1 != X2 )
                                                 => ~ ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                                             => ( ! [X1: $i,X2: $i] :
                                                    ( ( X1 = X2 )
                                                   => ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                               => ( ! [X1: $i,X2: $i] :
                                                      ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                                     => ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                                                 => ( ! [X1: $i,X2: $i,X3: $i] :
                                                        ( ( in @ X3 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                       => ( ( X3 != X1 )
                                                         => ( X3 = X2 ) ) )
                                                   => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                     => ( ! [X1: $i,X2: $i] : ( in @ X2 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                       => ( ! [X1: $i,X2: $i > $o] :
                                                              ( ~ ! [X3: $i] :
                                                                    ( ( in @ X3 @ X1 )
                                                                   => ~ ( X2 @ X3 ) )
                                                             => ( ( dsetconstr @ X1 @ X2 )
                                                               != emptyset ) )
                                                         => ( ! [X1: $i > $o,X2: $i] :
                                                                ( ( in @ X2 @ emptyset )
                                                               => ( X1 @ X2 ) )
                                                           => ( ! [X1: $i,X2: $i > $o] :
                                                                  ( ~ ! [X3: $i] :
                                                                        ( ( in @ X3 @ X1 )
                                                                       => ( X2 @ X3 ) )
                                                                 => ~ ! [X3: $i] :
                                                                        ( ( in @ X3 @ X1 )
                                                                       => ( X2 @ X3 ) ) )
                                                             => ( ! [X1: $i,X2: $i > $o] :
                                                                    ( ! [X3: $i] :
                                                                        ( ( in @ X3 @ X1 )
                                                                       => ~ ( X2 @ X3 ) )
                                                                   => ! [X3: $i] :
                                                                        ( ( in @ X3 @ X1 )
                                                                       => ~ ( X2 @ X3 ) ) )
                                                               => ( ! [X1: $i,X2: $i > $o] :
                                                                      ( ! [X3: $i] :
                                                                          ( ( in @ X3 @ X1 )
                                                                         => ~ ( X2 @ X3 ) )
                                                                     => ! [X3: $i] :
                                                                          ( ( in @ X3 @ X1 )
                                                                         => ~ ( X2 @ X3 ) ) )
                                                                 => ( ! [X1: $i,X2: $i > $o] :
                                                                        ( ~ ! [X3: $i] :
                                                                              ( ( in @ X3 @ X1 )
                                                                             => ( X2 @ X3 ) )
                                                                       => ~ ! [X3: $i] :
                                                                              ( ( in @ X3 @ X1 )
                                                                             => ( X2 @ X3 ) ) )
                                                                   => ( ! [X1: $o] :
                                                                          ( X1
                                                                         => ( in @ emptyset @ ( prop2set @ X1 ) ) )
                                                                     => ( ! [X1: $o] :
                                                                            ( X1
                                                                           => ( set2prop @ ( prop2set @ X1 ) ) )
                                                                       => ( ! [X1: $i,X2: $i > $o] :
                                                                              ( ! [X3: $i] :
                                                                                  ( ( in @ X3 @ X1 )
                                                                                 => ~ ( X2 @ X3 ) )
                                                                             => ! [X3: $i] :
                                                                                  ( ( in @ X3 @ X1 )
                                                                                 => ~ ( X2 @ X3 ) ) )
                                                                         => ( ! [X1: $i,X2: $i > $o] :
                                                                                ( ~ ! [X3: $i] :
                                                                                      ( ( in @ X3 @ X1 )
                                                                                     => ( X2 @ X3 ) )
                                                                               => ~ ! [X3: $i] :
                                                                                      ( ( in @ X3 @ X1 )
                                                                                     => ( X2 @ X3 ) ) )
                                                                           => ( ! [X1: $i > $o] :
                                                                                  ( ~ ! [X2: $i] :
                                                                                        ( ( X1 @ X2 )
                                                                                       => ~ ! [X3: $i] :
                                                                                              ( ( X1 @ X3 )
                                                                                             => ( X2 = X3 ) ) )
                                                                                 => ~ ! [X2: $i] :
                                                                                        ( ( X1 @ X2 )
                                                                                       => ~ ! [X3: $i] :
                                                                                              ( ( X1 @ X3 )
                                                                                             => ( X2 = X3 ) ) ) )
                                                                             => ( ! [X1: $i > $o] :
                                                                                    ( ~ ! [X2: $i] :
                                                                                          ~ ( X1 @ X2 )
                                                                                   => ( ! [X2: $i,X3: $i] :
                                                                                          ( ( X1 @ X2 )
                                                                                         => ( ( X1 @ X3 )
                                                                                           => ( X2 = X3 ) ) )
                                                                                     => ~ ! [X2: $i] :
                                                                                            ( ( X1 @ X2 )
                                                                                           => ~ ! [X3: $i] :
                                                                                                  ( ( X1 @ X3 )
                                                                                                 => ( X2 = X3 ) ) ) ) )
                                                                               => ! [X1: $i > $o] :
                                                                                    ( ~ ! [X2: $i] :
                                                                                          ~ ! [X3: $i] :
                                                                                              ( ( X1 @ X3 )
                                                                                              = ( X3 = X2 ) )
                                                                                   => ~ ! [X2: $i] :
                                                                                          ( ( X1 @ X2 )
                                                                                         => ~ ! [X3: $i] :
                                                                                                ( ( X1 @ X3 )
                                                                                               => ( X2 = X3 ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ),
    introduced(assumption,[]) ).

thf(h47,assumption,
    ! [X1: $i,X2: $i > $o,X3: $i] :
      ( ( in @ X3 @ X1 )
     => ( ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) )
        = ( X2 @ X3 ) ) ),
    introduced(assumption,[]) ).

thf(h48,assumption,
    ~ ( ! [X1: $i] :
          ( ( X1 != emptyset )
         => ~ ! [X2: $i] :
                ~ ( in @ X2 @ X1 ) )
     => ( ! [X1: $i,X2: $i > $o,X3: $i] :
            ( ( in @ X3 @ X1 )
           => ( ( X2 @ X3 )
             => ( ( dsetconstr @ X1 @ X2 )
               != emptyset ) ) )
       => ( ! [X1: $i] :
              ( ~ ! [X2: $i] :
                    ~ ( in @ X2 @ X1 )
             => ( X1 != emptyset ) )
         => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ X2 ) )
           => ( ( in @ emptyset @ ( setadjoin @ emptyset @ emptyset ) )
             => ( ! [X1: $i,X2: $i,X3: $i] :
                    ( ( in @ X3 @ X2 )
                   => ( in @ X3 @ ( setadjoin @ X1 @ X2 ) ) )
               => ( ! [X1: $i,X2: $i,X3: $i] :
                      ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
                     => ! [X4: $o] :
                          ( ( ( X3 = X1 )
                           => X4 )
                         => ( ( ( in @ X3 @ X2 )
                             => X4 )
                           => X4 ) ) )
                 => ( ! [X1: $i,X2: $i,X3: $i] :
                        ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
                       => ( ( X3 != X1 )
                         => ( in @ X3 @ X2 ) ) )
                   => ( ! [X1: $i] :
                          ( ( dsetconstr @ X1
                            @ ^ [X2: $i] : ~ $false )
                          = X1 )
                     => ( ! [X1: $i,X2: $i] :
                            ( ! [X3: $i] :
                                ( ( in @ X3 @ X2 )
                               => ( in @ X3 @ X1 ) )
                           => ( in @ X2 @ ( powerset @ X1 ) ) )
                       => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
                         => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
                           => ( ! [X1: $i,X2: $i,X3: $i] :
                                  ( ( in @ X2 @ ( powerset @ X1 ) )
                                 => ( ( in @ X3 @ X2 )
                                   => ( in @ X3 @ X1 ) ) )
                             => ( ! [X1: $i,X2: $i,X3: $i] :
                                    ( ( in @ X2 @ X3 )
                                   => ( ( in @ X3 @ X1 )
                                     => ( in @ X2 @ ( setunion @ X1 ) ) ) )
                               => ( ! [X1: $i,X2: $i] :
                                      ( ( in @ X2 @ ( setunion @ X1 ) )
                                     => ! [X3: $o] :
                                          ( ! [X4: $i] :
                                              ( ( in @ X2 @ X4 )
                                             => ( ( in @ X4 @ X1 )
                                               => X3 ) )
                                         => X3 ) )
                                 => ( ! [X1: $i,X2: $i] :
                                        ( ( in @ X2 @ X1 )
                                       => ( in @ X2 @ ( powerset @ ( setunion @ X1 ) ) ) )
                                   => ( ! [X1: $i > $o] :
                                          ( ~ ! [X2: $i] :
                                                ( ( X1 @ X2 )
                                               => ~ ! [X3: $i] :
                                                      ( ( X1 @ X3 )
                                                     => ( X2 = X3 ) ) )
                                         => ~ ! [X2: $i] :
                                                ~ ! [X3: $i] :
                                                    ( ( X1 @ X3 )
                                                    = ( X3 = X2 ) ) )
                                     => ( ! [X1: $i] :
                                            ( ( X1 != emptyset )
                                           => ~ ! [X2: $i] :
                                                  ~ ( in @ X2 @ X1 ) )
                                       => ( ! [X1: $i,X2: $i] :
                                              ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                             => ( X1 = X2 ) )
                                         => ( ! [X1: $i,X2: $i] :
                                                ( ( X1 != X2 )
                                               => ~ ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                                           => ( ! [X1: $i,X2: $i] :
                                                  ( ( X1 = X2 )
                                                 => ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                             => ( ! [X1: $i,X2: $i] :
                                                    ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                                   => ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                                               => ( ! [X1: $i,X2: $i,X3: $i] :
                                                      ( ( in @ X3 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                     => ( ( X3 != X1 )
                                                       => ( X3 = X2 ) ) )
                                                 => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                   => ( ! [X1: $i,X2: $i] : ( in @ X2 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                     => ( ! [X1: $i,X2: $i > $o] :
                                                            ( ~ ! [X3: $i] :
                                                                  ( ( in @ X3 @ X1 )
                                                                 => ~ ( X2 @ X3 ) )
                                                           => ( ( dsetconstr @ X1 @ X2 )
                                                             != emptyset ) )
                                                       => ( ! [X1: $i > $o,X2: $i] :
                                                              ( ( in @ X2 @ emptyset )
                                                             => ( X1 @ X2 ) )
                                                         => ( ! [X1: $i,X2: $i > $o] :
                                                                ( ~ ! [X3: $i] :
                                                                      ( ( in @ X3 @ X1 )
                                                                     => ( X2 @ X3 ) )
                                                               => ~ ! [X3: $i] :
                                                                      ( ( in @ X3 @ X1 )
                                                                     => ( X2 @ X3 ) ) )
                                                           => ( ! [X1: $i,X2: $i > $o] :
                                                                  ( ! [X3: $i] :
                                                                      ( ( in @ X3 @ X1 )
                                                                     => ~ ( X2 @ X3 ) )
                                                                 => ! [X3: $i] :
                                                                      ( ( in @ X3 @ X1 )
                                                                     => ~ ( X2 @ X3 ) ) )
                                                             => ( ! [X1: $i,X2: $i > $o] :
                                                                    ( ! [X3: $i] :
                                                                        ( ( in @ X3 @ X1 )
                                                                       => ~ ( X2 @ X3 ) )
                                                                   => ! [X3: $i] :
                                                                        ( ( in @ X3 @ X1 )
                                                                       => ~ ( X2 @ X3 ) ) )
                                                               => ( ! [X1: $i,X2: $i > $o] :
                                                                      ( ~ ! [X3: $i] :
                                                                            ( ( in @ X3 @ X1 )
                                                                           => ( X2 @ X3 ) )
                                                                     => ~ ! [X3: $i] :
                                                                            ( ( in @ X3 @ X1 )
                                                                           => ( X2 @ X3 ) ) )
                                                                 => ( ! [X1: $o] :
                                                                        ( X1
                                                                       => ( in @ emptyset @ ( prop2set @ X1 ) ) )
                                                                   => ( ! [X1: $o] :
                                                                          ( X1
                                                                         => ( set2prop @ ( prop2set @ X1 ) ) )
                                                                     => ( ! [X1: $i,X2: $i > $o] :
                                                                            ( ! [X3: $i] :
                                                                                ( ( in @ X3 @ X1 )
                                                                               => ~ ( X2 @ X3 ) )
                                                                           => ! [X3: $i] :
                                                                                ( ( in @ X3 @ X1 )
                                                                               => ~ ( X2 @ X3 ) ) )
                                                                       => ( ! [X1: $i,X2: $i > $o] :
                                                                              ( ~ ! [X3: $i] :
                                                                                    ( ( in @ X3 @ X1 )
                                                                                   => ( X2 @ X3 ) )
                                                                             => ~ ! [X3: $i] :
                                                                                    ( ( in @ X3 @ X1 )
                                                                                   => ( X2 @ X3 ) ) )
                                                                         => ( ! [X1: $i > $o] :
                                                                                ( ~ ! [X2: $i] :
                                                                                      ( ( X1 @ X2 )
                                                                                     => ~ ! [X3: $i] :
                                                                                            ( ( X1 @ X3 )
                                                                                           => ( X2 = X3 ) ) )
                                                                               => ~ ! [X2: $i] :
                                                                                      ( ( X1 @ X2 )
                                                                                     => ~ ! [X3: $i] :
                                                                                            ( ( X1 @ X3 )
                                                                                           => ( X2 = X3 ) ) ) )
                                                                           => ( ! [X1: $i > $o] :
                                                                                  ( ~ ! [X2: $i] :
                                                                                        ~ ( X1 @ X2 )
                                                                                 => ( ! [X2: $i,X3: $i] :
                                                                                        ( ( X1 @ X2 )
                                                                                       => ( ( X1 @ X3 )
                                                                                         => ( X2 = X3 ) ) )
                                                                                   => ~ ! [X2: $i] :
                                                                                          ( ( X1 @ X2 )
                                                                                         => ~ ! [X3: $i] :
                                                                                                ( ( X1 @ X3 )
                                                                                               => ( X2 = X3 ) ) ) ) )
                                                                             => ! [X1: $i > $o] :
                                                                                  ( ~ ! [X2: $i] :
                                                                                        ~ ! [X3: $i] :
                                                                                            ( ( X1 @ X3 )
                                                                                            = ( X3 = X2 ) )
                                                                                 => ~ ! [X2: $i] :
                                                                                        ( ( X1 @ X2 )
                                                                                       => ~ ! [X3: $i] :
                                                                                              ( ( X1 @ X3 )
                                                                                             => ( X2 = X3 ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ),
    introduced(assumption,[]) ).

thf(h49,assumption,
    ! [X1: $i] :
      ( ( X1 != emptyset )
     => ~ ! [X2: $i] :
            ~ ( in @ X2 @ X1 ) ),
    introduced(assumption,[]) ).

thf(h50,assumption,
    ~ ( ! [X1: $i,X2: $i > $o,X3: $i] :
          ( ( in @ X3 @ X1 )
         => ( ( X2 @ X3 )
           => ( ( dsetconstr @ X1 @ X2 )
             != emptyset ) ) )
     => ( ! [X1: $i] :
            ( ~ ! [X2: $i] :
                  ~ ( in @ X2 @ X1 )
           => ( X1 != emptyset ) )
       => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ X2 ) )
         => ( ( in @ emptyset @ ( setadjoin @ emptyset @ emptyset ) )
           => ( ! [X1: $i,X2: $i,X3: $i] :
                  ( ( in @ X3 @ X2 )
                 => ( in @ X3 @ ( setadjoin @ X1 @ X2 ) ) )
             => ( ! [X1: $i,X2: $i,X3: $i] :
                    ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
                   => ! [X4: $o] :
                        ( ( ( X3 = X1 )
                         => X4 )
                       => ( ( ( in @ X3 @ X2 )
                           => X4 )
                         => X4 ) ) )
               => ( ! [X1: $i,X2: $i,X3: $i] :
                      ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
                     => ( ( X3 != X1 )
                       => ( in @ X3 @ X2 ) ) )
                 => ( ! [X1: $i] :
                        ( ( dsetconstr @ X1
                          @ ^ [X2: $i] : ~ $false )
                        = X1 )
                   => ( ! [X1: $i,X2: $i] :
                          ( ! [X3: $i] :
                              ( ( in @ X3 @ X2 )
                             => ( in @ X3 @ X1 ) )
                         => ( in @ X2 @ ( powerset @ X1 ) ) )
                     => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
                       => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
                         => ( ! [X1: $i,X2: $i,X3: $i] :
                                ( ( in @ X2 @ ( powerset @ X1 ) )
                               => ( ( in @ X3 @ X2 )
                                 => ( in @ X3 @ X1 ) ) )
                           => ( ! [X1: $i,X2: $i,X3: $i] :
                                  ( ( in @ X2 @ X3 )
                                 => ( ( in @ X3 @ X1 )
                                   => ( in @ X2 @ ( setunion @ X1 ) ) ) )
                             => ( ! [X1: $i,X2: $i] :
                                    ( ( in @ X2 @ ( setunion @ X1 ) )
                                   => ! [X3: $o] :
                                        ( ! [X4: $i] :
                                            ( ( in @ X2 @ X4 )
                                           => ( ( in @ X4 @ X1 )
                                             => X3 ) )
                                       => X3 ) )
                               => ( ! [X1: $i,X2: $i] :
                                      ( ( in @ X2 @ X1 )
                                     => ( in @ X2 @ ( powerset @ ( setunion @ X1 ) ) ) )
                                 => ( ! [X1: $i > $o] :
                                        ( ~ ! [X2: $i] :
                                              ( ( X1 @ X2 )
                                             => ~ ! [X3: $i] :
                                                    ( ( X1 @ X3 )
                                                   => ( X2 = X3 ) ) )
                                       => ~ ! [X2: $i] :
                                              ~ ! [X3: $i] :
                                                  ( ( X1 @ X3 )
                                                  = ( X3 = X2 ) ) )
                                   => ( ! [X1: $i] :
                                          ( ( X1 != emptyset )
                                         => ~ ! [X2: $i] :
                                                ~ ( in @ X2 @ X1 ) )
                                     => ( ! [X1: $i,X2: $i] :
                                            ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                           => ( X1 = X2 ) )
                                       => ( ! [X1: $i,X2: $i] :
                                              ( ( X1 != X2 )
                                             => ~ ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                                         => ( ! [X1: $i,X2: $i] :
                                                ( ( X1 = X2 )
                                               => ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                           => ( ! [X1: $i,X2: $i] :
                                                  ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                                 => ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                                             => ( ! [X1: $i,X2: $i,X3: $i] :
                                                    ( ( in @ X3 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                   => ( ( X3 != X1 )
                                                     => ( X3 = X2 ) ) )
                                               => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                 => ( ! [X1: $i,X2: $i] : ( in @ X2 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                   => ( ! [X1: $i,X2: $i > $o] :
                                                          ( ~ ! [X3: $i] :
                                                                ( ( in @ X3 @ X1 )
                                                               => ~ ( X2 @ X3 ) )
                                                         => ( ( dsetconstr @ X1 @ X2 )
                                                           != emptyset ) )
                                                     => ( ! [X1: $i > $o,X2: $i] :
                                                            ( ( in @ X2 @ emptyset )
                                                           => ( X1 @ X2 ) )
                                                       => ( ! [X1: $i,X2: $i > $o] :
                                                              ( ~ ! [X3: $i] :
                                                                    ( ( in @ X3 @ X1 )
                                                                   => ( X2 @ X3 ) )
                                                             => ~ ! [X3: $i] :
                                                                    ( ( in @ X3 @ X1 )
                                                                   => ( X2 @ X3 ) ) )
                                                         => ( ! [X1: $i,X2: $i > $o] :
                                                                ( ! [X3: $i] :
                                                                    ( ( in @ X3 @ X1 )
                                                                   => ~ ( X2 @ X3 ) )
                                                               => ! [X3: $i] :
                                                                    ( ( in @ X3 @ X1 )
                                                                   => ~ ( X2 @ X3 ) ) )
                                                           => ( ! [X1: $i,X2: $i > $o] :
                                                                  ( ! [X3: $i] :
                                                                      ( ( in @ X3 @ X1 )
                                                                     => ~ ( X2 @ X3 ) )
                                                                 => ! [X3: $i] :
                                                                      ( ( in @ X3 @ X1 )
                                                                     => ~ ( X2 @ X3 ) ) )
                                                             => ( ! [X1: $i,X2: $i > $o] :
                                                                    ( ~ ! [X3: $i] :
                                                                          ( ( in @ X3 @ X1 )
                                                                         => ( X2 @ X3 ) )
                                                                   => ~ ! [X3: $i] :
                                                                          ( ( in @ X3 @ X1 )
                                                                         => ( X2 @ X3 ) ) )
                                                               => ( ! [X1: $o] :
                                                                      ( X1
                                                                     => ( in @ emptyset @ ( prop2set @ X1 ) ) )
                                                                 => ( ! [X1: $o] :
                                                                        ( X1
                                                                       => ( set2prop @ ( prop2set @ X1 ) ) )
                                                                   => ( ! [X1: $i,X2: $i > $o] :
                                                                          ( ! [X3: $i] :
                                                                              ( ( in @ X3 @ X1 )
                                                                             => ~ ( X2 @ X3 ) )
                                                                         => ! [X3: $i] :
                                                                              ( ( in @ X3 @ X1 )
                                                                             => ~ ( X2 @ X3 ) ) )
                                                                     => ( ! [X1: $i,X2: $i > $o] :
                                                                            ( ~ ! [X3: $i] :
                                                                                  ( ( in @ X3 @ X1 )
                                                                                 => ( X2 @ X3 ) )
                                                                           => ~ ! [X3: $i] :
                                                                                  ( ( in @ X3 @ X1 )
                                                                                 => ( X2 @ X3 ) ) )
                                                                       => ( ! [X1: $i > $o] :
                                                                              ( ~ ! [X2: $i] :
                                                                                    ( ( X1 @ X2 )
                                                                                   => ~ ! [X3: $i] :
                                                                                          ( ( X1 @ X3 )
                                                                                         => ( X2 = X3 ) ) )
                                                                             => ~ ! [X2: $i] :
                                                                                    ( ( X1 @ X2 )
                                                                                   => ~ ! [X3: $i] :
                                                                                          ( ( X1 @ X3 )
                                                                                         => ( X2 = X3 ) ) ) )
                                                                         => ( ! [X1: $i > $o] :
                                                                                ( ~ ! [X2: $i] :
                                                                                      ~ ( X1 @ X2 )
                                                                               => ( ! [X2: $i,X3: $i] :
                                                                                      ( ( X1 @ X2 )
                                                                                     => ( ( X1 @ X3 )
                                                                                       => ( X2 = X3 ) ) )
                                                                                 => ~ ! [X2: $i] :
                                                                                        ( ( X1 @ X2 )
                                                                                       => ~ ! [X3: $i] :
                                                                                              ( ( X1 @ X3 )
                                                                                             => ( X2 = X3 ) ) ) ) )
                                                                           => ! [X1: $i > $o] :
                                                                                ( ~ ! [X2: $i] :
                                                                                      ~ ! [X3: $i] :
                                                                                          ( ( X1 @ X3 )
                                                                                          = ( X3 = X2 ) )
                                                                               => ~ ! [X2: $i] :
                                                                                      ( ( X1 @ X2 )
                                                                                     => ~ ! [X3: $i] :
                                                                                            ( ( X1 @ X3 )
                                                                                           => ( X2 = X3 ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ),
    introduced(assumption,[]) ).

thf(h51,assumption,
    ! [X1: $i,X2: $i > $o,X3: $i] :
      ( ( in @ X3 @ X1 )
     => ( ( X2 @ X3 )
       => ( ( dsetconstr @ X1 @ X2 )
         != emptyset ) ) ),
    introduced(assumption,[]) ).

thf(h52,assumption,
    ~ ( ! [X1: $i] :
          ( ~ ! [X2: $i] :
                ~ ( in @ X2 @ X1 )
         => ( X1 != emptyset ) )
     => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ X2 ) )
       => ( ( in @ emptyset @ ( setadjoin @ emptyset @ emptyset ) )
         => ( ! [X1: $i,X2: $i,X3: $i] :
                ( ( in @ X3 @ X2 )
               => ( in @ X3 @ ( setadjoin @ X1 @ X2 ) ) )
           => ( ! [X1: $i,X2: $i,X3: $i] :
                  ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
                 => ! [X4: $o] :
                      ( ( ( X3 = X1 )
                       => X4 )
                     => ( ( ( in @ X3 @ X2 )
                         => X4 )
                       => X4 ) ) )
             => ( ! [X1: $i,X2: $i,X3: $i] :
                    ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
                   => ( ( X3 != X1 )
                     => ( in @ X3 @ X2 ) ) )
               => ( ! [X1: $i] :
                      ( ( dsetconstr @ X1
                        @ ^ [X2: $i] : ~ $false )
                      = X1 )
                 => ( ! [X1: $i,X2: $i] :
                        ( ! [X3: $i] :
                            ( ( in @ X3 @ X2 )
                           => ( in @ X3 @ X1 ) )
                       => ( in @ X2 @ ( powerset @ X1 ) ) )
                   => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
                     => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
                       => ( ! [X1: $i,X2: $i,X3: $i] :
                              ( ( in @ X2 @ ( powerset @ X1 ) )
                             => ( ( in @ X3 @ X2 )
                               => ( in @ X3 @ X1 ) ) )
                         => ( ! [X1: $i,X2: $i,X3: $i] :
                                ( ( in @ X2 @ X3 )
                               => ( ( in @ X3 @ X1 )
                                 => ( in @ X2 @ ( setunion @ X1 ) ) ) )
                           => ( ! [X1: $i,X2: $i] :
                                  ( ( in @ X2 @ ( setunion @ X1 ) )
                                 => ! [X3: $o] :
                                      ( ! [X4: $i] :
                                          ( ( in @ X2 @ X4 )
                                         => ( ( in @ X4 @ X1 )
                                           => X3 ) )
                                     => X3 ) )
                             => ( ! [X1: $i,X2: $i] :
                                    ( ( in @ X2 @ X1 )
                                   => ( in @ X2 @ ( powerset @ ( setunion @ X1 ) ) ) )
                               => ( ! [X1: $i > $o] :
                                      ( ~ ! [X2: $i] :
                                            ( ( X1 @ X2 )
                                           => ~ ! [X3: $i] :
                                                  ( ( X1 @ X3 )
                                                 => ( X2 = X3 ) ) )
                                     => ~ ! [X2: $i] :
                                            ~ ! [X3: $i] :
                                                ( ( X1 @ X3 )
                                                = ( X3 = X2 ) ) )
                                 => ( ! [X1: $i] :
                                        ( ( X1 != emptyset )
                                       => ~ ! [X2: $i] :
                                              ~ ( in @ X2 @ X1 ) )
                                   => ( ! [X1: $i,X2: $i] :
                                          ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                         => ( X1 = X2 ) )
                                     => ( ! [X1: $i,X2: $i] :
                                            ( ( X1 != X2 )
                                           => ~ ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                                       => ( ! [X1: $i,X2: $i] :
                                              ( ( X1 = X2 )
                                             => ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                         => ( ! [X1: $i,X2: $i] :
                                                ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                               => ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                                           => ( ! [X1: $i,X2: $i,X3: $i] :
                                                  ( ( in @ X3 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                 => ( ( X3 != X1 )
                                                   => ( X3 = X2 ) ) )
                                             => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                               => ( ! [X1: $i,X2: $i] : ( in @ X2 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                 => ( ! [X1: $i,X2: $i > $o] :
                                                        ( ~ ! [X3: $i] :
                                                              ( ( in @ X3 @ X1 )
                                                             => ~ ( X2 @ X3 ) )
                                                       => ( ( dsetconstr @ X1 @ X2 )
                                                         != emptyset ) )
                                                   => ( ! [X1: $i > $o,X2: $i] :
                                                          ( ( in @ X2 @ emptyset )
                                                         => ( X1 @ X2 ) )
                                                     => ( ! [X1: $i,X2: $i > $o] :
                                                            ( ~ ! [X3: $i] :
                                                                  ( ( in @ X3 @ X1 )
                                                                 => ( X2 @ X3 ) )
                                                           => ~ ! [X3: $i] :
                                                                  ( ( in @ X3 @ X1 )
                                                                 => ( X2 @ X3 ) ) )
                                                       => ( ! [X1: $i,X2: $i > $o] :
                                                              ( ! [X3: $i] :
                                                                  ( ( in @ X3 @ X1 )
                                                                 => ~ ( X2 @ X3 ) )
                                                             => ! [X3: $i] :
                                                                  ( ( in @ X3 @ X1 )
                                                                 => ~ ( X2 @ X3 ) ) )
                                                         => ( ! [X1: $i,X2: $i > $o] :
                                                                ( ! [X3: $i] :
                                                                    ( ( in @ X3 @ X1 )
                                                                   => ~ ( X2 @ X3 ) )
                                                               => ! [X3: $i] :
                                                                    ( ( in @ X3 @ X1 )
                                                                   => ~ ( X2 @ X3 ) ) )
                                                           => ( ! [X1: $i,X2: $i > $o] :
                                                                  ( ~ ! [X3: $i] :
                                                                        ( ( in @ X3 @ X1 )
                                                                       => ( X2 @ X3 ) )
                                                                 => ~ ! [X3: $i] :
                                                                        ( ( in @ X3 @ X1 )
                                                                       => ( X2 @ X3 ) ) )
                                                             => ( ! [X1: $o] :
                                                                    ( X1
                                                                   => ( in @ emptyset @ ( prop2set @ X1 ) ) )
                                                               => ( ! [X1: $o] :
                                                                      ( X1
                                                                     => ( set2prop @ ( prop2set @ X1 ) ) )
                                                                 => ( ! [X1: $i,X2: $i > $o] :
                                                                        ( ! [X3: $i] :
                                                                            ( ( in @ X3 @ X1 )
                                                                           => ~ ( X2 @ X3 ) )
                                                                       => ! [X3: $i] :
                                                                            ( ( in @ X3 @ X1 )
                                                                           => ~ ( X2 @ X3 ) ) )
                                                                   => ( ! [X1: $i,X2: $i > $o] :
                                                                          ( ~ ! [X3: $i] :
                                                                                ( ( in @ X3 @ X1 )
                                                                               => ( X2 @ X3 ) )
                                                                         => ~ ! [X3: $i] :
                                                                                ( ( in @ X3 @ X1 )
                                                                               => ( X2 @ X3 ) ) )
                                                                     => ( ! [X1: $i > $o] :
                                                                            ( ~ ! [X2: $i] :
                                                                                  ( ( X1 @ X2 )
                                                                                 => ~ ! [X3: $i] :
                                                                                        ( ( X1 @ X3 )
                                                                                       => ( X2 = X3 ) ) )
                                                                           => ~ ! [X2: $i] :
                                                                                  ( ( X1 @ X2 )
                                                                                 => ~ ! [X3: $i] :
                                                                                        ( ( X1 @ X3 )
                                                                                       => ( X2 = X3 ) ) ) )
                                                                       => ( ! [X1: $i > $o] :
                                                                              ( ~ ! [X2: $i] :
                                                                                    ~ ( X1 @ X2 )
                                                                             => ( ! [X2: $i,X3: $i] :
                                                                                    ( ( X1 @ X2 )
                                                                                   => ( ( X1 @ X3 )
                                                                                     => ( X2 = X3 ) ) )
                                                                               => ~ ! [X2: $i] :
                                                                                      ( ( X1 @ X2 )
                                                                                     => ~ ! [X3: $i] :
                                                                                            ( ( X1 @ X3 )
                                                                                           => ( X2 = X3 ) ) ) ) )
                                                                         => ! [X1: $i > $o] :
                                                                              ( ~ ! [X2: $i] :
                                                                                    ~ ! [X3: $i] :
                                                                                        ( ( X1 @ X3 )
                                                                                        = ( X3 = X2 ) )
                                                                             => ~ ! [X2: $i] :
                                                                                    ( ( X1 @ X2 )
                                                                                   => ~ ! [X3: $i] :
                                                                                          ( ( X1 @ X3 )
                                                                                         => ( X2 = X3 ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ),
    introduced(assumption,[]) ).

thf(h53,assumption,
    ! [X1: $i] :
      ( ~ ! [X2: $i] :
            ~ ( in @ X2 @ X1 )
     => ( X1 != emptyset ) ),
    introduced(assumption,[]) ).

thf(h54,assumption,
    ~ ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ X2 ) )
     => ( ( in @ emptyset @ ( setadjoin @ emptyset @ emptyset ) )
       => ( ! [X1: $i,X2: $i,X3: $i] :
              ( ( in @ X3 @ X2 )
             => ( in @ X3 @ ( setadjoin @ X1 @ X2 ) ) )
         => ( ! [X1: $i,X2: $i,X3: $i] :
                ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
               => ! [X4: $o] :
                    ( ( ( X3 = X1 )
                     => X4 )
                   => ( ( ( in @ X3 @ X2 )
                       => X4 )
                     => X4 ) ) )
           => ( ! [X1: $i,X2: $i,X3: $i] :
                  ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
                 => ( ( X3 != X1 )
                   => ( in @ X3 @ X2 ) ) )
             => ( ! [X1: $i] :
                    ( ( dsetconstr @ X1
                      @ ^ [X2: $i] : ~ $false )
                    = X1 )
               => ( ! [X1: $i,X2: $i] :
                      ( ! [X3: $i] :
                          ( ( in @ X3 @ X2 )
                         => ( in @ X3 @ X1 ) )
                     => ( in @ X2 @ ( powerset @ X1 ) ) )
                 => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
                   => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
                     => ( ! [X1: $i,X2: $i,X3: $i] :
                            ( ( in @ X2 @ ( powerset @ X1 ) )
                           => ( ( in @ X3 @ X2 )
                             => ( in @ X3 @ X1 ) ) )
                       => ( ! [X1: $i,X2: $i,X3: $i] :
                              ( ( in @ X2 @ X3 )
                             => ( ( in @ X3 @ X1 )
                               => ( in @ X2 @ ( setunion @ X1 ) ) ) )
                         => ( ! [X1: $i,X2: $i] :
                                ( ( in @ X2 @ ( setunion @ X1 ) )
                               => ! [X3: $o] :
                                    ( ! [X4: $i] :
                                        ( ( in @ X2 @ X4 )
                                       => ( ( in @ X4 @ X1 )
                                         => X3 ) )
                                   => X3 ) )
                           => ( ! [X1: $i,X2: $i] :
                                  ( ( in @ X2 @ X1 )
                                 => ( in @ X2 @ ( powerset @ ( setunion @ X1 ) ) ) )
                             => ( ! [X1: $i > $o] :
                                    ( ~ ! [X2: $i] :
                                          ( ( X1 @ X2 )
                                         => ~ ! [X3: $i] :
                                                ( ( X1 @ X3 )
                                               => ( X2 = X3 ) ) )
                                   => ~ ! [X2: $i] :
                                          ~ ! [X3: $i] :
                                              ( ( X1 @ X3 )
                                              = ( X3 = X2 ) ) )
                               => ( ! [X1: $i] :
                                      ( ( X1 != emptyset )
                                     => ~ ! [X2: $i] :
                                            ~ ( in @ X2 @ X1 ) )
                                 => ( ! [X1: $i,X2: $i] :
                                        ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                       => ( X1 = X2 ) )
                                   => ( ! [X1: $i,X2: $i] :
                                          ( ( X1 != X2 )
                                         => ~ ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                                     => ( ! [X1: $i,X2: $i] :
                                            ( ( X1 = X2 )
                                           => ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                       => ( ! [X1: $i,X2: $i] :
                                              ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                             => ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                                         => ( ! [X1: $i,X2: $i,X3: $i] :
                                                ( ( in @ X3 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                               => ( ( X3 != X1 )
                                                 => ( X3 = X2 ) ) )
                                           => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                             => ( ! [X1: $i,X2: $i] : ( in @ X2 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                               => ( ! [X1: $i,X2: $i > $o] :
                                                      ( ~ ! [X3: $i] :
                                                            ( ( in @ X3 @ X1 )
                                                           => ~ ( X2 @ X3 ) )
                                                     => ( ( dsetconstr @ X1 @ X2 )
                                                       != emptyset ) )
                                                 => ( ! [X1: $i > $o,X2: $i] :
                                                        ( ( in @ X2 @ emptyset )
                                                       => ( X1 @ X2 ) )
                                                   => ( ! [X1: $i,X2: $i > $o] :
                                                          ( ~ ! [X3: $i] :
                                                                ( ( in @ X3 @ X1 )
                                                               => ( X2 @ X3 ) )
                                                         => ~ ! [X3: $i] :
                                                                ( ( in @ X3 @ X1 )
                                                               => ( X2 @ X3 ) ) )
                                                     => ( ! [X1: $i,X2: $i > $o] :
                                                            ( ! [X3: $i] :
                                                                ( ( in @ X3 @ X1 )
                                                               => ~ ( X2 @ X3 ) )
                                                           => ! [X3: $i] :
                                                                ( ( in @ X3 @ X1 )
                                                               => ~ ( X2 @ X3 ) ) )
                                                       => ( ! [X1: $i,X2: $i > $o] :
                                                              ( ! [X3: $i] :
                                                                  ( ( in @ X3 @ X1 )
                                                                 => ~ ( X2 @ X3 ) )
                                                             => ! [X3: $i] :
                                                                  ( ( in @ X3 @ X1 )
                                                                 => ~ ( X2 @ X3 ) ) )
                                                         => ( ! [X1: $i,X2: $i > $o] :
                                                                ( ~ ! [X3: $i] :
                                                                      ( ( in @ X3 @ X1 )
                                                                     => ( X2 @ X3 ) )
                                                               => ~ ! [X3: $i] :
                                                                      ( ( in @ X3 @ X1 )
                                                                     => ( X2 @ X3 ) ) )
                                                           => ( ! [X1: $o] :
                                                                  ( X1
                                                                 => ( in @ emptyset @ ( prop2set @ X1 ) ) )
                                                             => ( ! [X1: $o] :
                                                                    ( X1
                                                                   => ( set2prop @ ( prop2set @ X1 ) ) )
                                                               => ( ! [X1: $i,X2: $i > $o] :
                                                                      ( ! [X3: $i] :
                                                                          ( ( in @ X3 @ X1 )
                                                                         => ~ ( X2 @ X3 ) )
                                                                     => ! [X3: $i] :
                                                                          ( ( in @ X3 @ X1 )
                                                                         => ~ ( X2 @ X3 ) ) )
                                                                 => ( ! [X1: $i,X2: $i > $o] :
                                                                        ( ~ ! [X3: $i] :
                                                                              ( ( in @ X3 @ X1 )
                                                                             => ( X2 @ X3 ) )
                                                                       => ~ ! [X3: $i] :
                                                                              ( ( in @ X3 @ X1 )
                                                                             => ( X2 @ X3 ) ) )
                                                                   => ( ! [X1: $i > $o] :
                                                                          ( ~ ! [X2: $i] :
                                                                                ( ( X1 @ X2 )
                                                                               => ~ ! [X3: $i] :
                                                                                      ( ( X1 @ X3 )
                                                                                     => ( X2 = X3 ) ) )
                                                                         => ~ ! [X2: $i] :
                                                                                ( ( X1 @ X2 )
                                                                               => ~ ! [X3: $i] :
                                                                                      ( ( X1 @ X3 )
                                                                                     => ( X2 = X3 ) ) ) )
                                                                     => ( ! [X1: $i > $o] :
                                                                            ( ~ ! [X2: $i] :
                                                                                  ~ ( X1 @ X2 )
                                                                           => ( ! [X2: $i,X3: $i] :
                                                                                  ( ( X1 @ X2 )
                                                                                 => ( ( X1 @ X3 )
                                                                                   => ( X2 = X3 ) ) )
                                                                             => ~ ! [X2: $i] :
                                                                                    ( ( X1 @ X2 )
                                                                                   => ~ ! [X3: $i] :
                                                                                          ( ( X1 @ X3 )
                                                                                         => ( X2 = X3 ) ) ) ) )
                                                                       => ! [X1: $i > $o] :
                                                                            ( ~ ! [X2: $i] :
                                                                                  ~ ! [X3: $i] :
                                                                                      ( ( X1 @ X3 )
                                                                                      = ( X3 = X2 ) )
                                                                           => ~ ! [X2: $i] :
                                                                                  ( ( X1 @ X2 )
                                                                                 => ~ ! [X3: $i] :
                                                                                        ( ( X1 @ X3 )
                                                                                       => ( X2 = X3 ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ),
    introduced(assumption,[]) ).

thf(h55,assumption,
    ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ X2 ) ),
    introduced(assumption,[]) ).

thf(h56,assumption,
    ~ ( ( in @ emptyset @ ( setadjoin @ emptyset @ emptyset ) )
     => ( ! [X1: $i,X2: $i,X3: $i] :
            ( ( in @ X3 @ X2 )
           => ( in @ X3 @ ( setadjoin @ X1 @ X2 ) ) )
       => ( ! [X1: $i,X2: $i,X3: $i] :
              ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
             => ! [X4: $o] :
                  ( ( ( X3 = X1 )
                   => X4 )
                 => ( ( ( in @ X3 @ X2 )
                     => X4 )
                   => X4 ) ) )
         => ( ! [X1: $i,X2: $i,X3: $i] :
                ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
               => ( ( X3 != X1 )
                 => ( in @ X3 @ X2 ) ) )
           => ( ! [X1: $i] :
                  ( ( dsetconstr @ X1
                    @ ^ [X2: $i] : ~ $false )
                  = X1 )
             => ( ! [X1: $i,X2: $i] :
                    ( ! [X3: $i] :
                        ( ( in @ X3 @ X2 )
                       => ( in @ X3 @ X1 ) )
                   => ( in @ X2 @ ( powerset @ X1 ) ) )
               => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
                 => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
                   => ( ! [X1: $i,X2: $i,X3: $i] :
                          ( ( in @ X2 @ ( powerset @ X1 ) )
                         => ( ( in @ X3 @ X2 )
                           => ( in @ X3 @ X1 ) ) )
                     => ( ! [X1: $i,X2: $i,X3: $i] :
                            ( ( in @ X2 @ X3 )
                           => ( ( in @ X3 @ X1 )
                             => ( in @ X2 @ ( setunion @ X1 ) ) ) )
                       => ( ! [X1: $i,X2: $i] :
                              ( ( in @ X2 @ ( setunion @ X1 ) )
                             => ! [X3: $o] :
                                  ( ! [X4: $i] :
                                      ( ( in @ X2 @ X4 )
                                     => ( ( in @ X4 @ X1 )
                                       => X3 ) )
                                 => X3 ) )
                         => ( ! [X1: $i,X2: $i] :
                                ( ( in @ X2 @ X1 )
                               => ( in @ X2 @ ( powerset @ ( setunion @ X1 ) ) ) )
                           => ( ! [X1: $i > $o] :
                                  ( ~ ! [X2: $i] :
                                        ( ( X1 @ X2 )
                                       => ~ ! [X3: $i] :
                                              ( ( X1 @ X3 )
                                             => ( X2 = X3 ) ) )
                                 => ~ ! [X2: $i] :
                                        ~ ! [X3: $i] :
                                            ( ( X1 @ X3 )
                                            = ( X3 = X2 ) ) )
                             => ( ! [X1: $i] :
                                    ( ( X1 != emptyset )
                                   => ~ ! [X2: $i] :
                                          ~ ( in @ X2 @ X1 ) )
                               => ( ! [X1: $i,X2: $i] :
                                      ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                     => ( X1 = X2 ) )
                                 => ( ! [X1: $i,X2: $i] :
                                        ( ( X1 != X2 )
                                       => ~ ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                                   => ( ! [X1: $i,X2: $i] :
                                          ( ( X1 = X2 )
                                         => ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                     => ( ! [X1: $i,X2: $i] :
                                            ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                           => ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                                       => ( ! [X1: $i,X2: $i,X3: $i] :
                                              ( ( in @ X3 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                             => ( ( X3 != X1 )
                                               => ( X3 = X2 ) ) )
                                         => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                           => ( ! [X1: $i,X2: $i] : ( in @ X2 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                             => ( ! [X1: $i,X2: $i > $o] :
                                                    ( ~ ! [X3: $i] :
                                                          ( ( in @ X3 @ X1 )
                                                         => ~ ( X2 @ X3 ) )
                                                   => ( ( dsetconstr @ X1 @ X2 )
                                                     != emptyset ) )
                                               => ( ! [X1: $i > $o,X2: $i] :
                                                      ( ( in @ X2 @ emptyset )
                                                     => ( X1 @ X2 ) )
                                                 => ( ! [X1: $i,X2: $i > $o] :
                                                        ( ~ ! [X3: $i] :
                                                              ( ( in @ X3 @ X1 )
                                                             => ( X2 @ X3 ) )
                                                       => ~ ! [X3: $i] :
                                                              ( ( in @ X3 @ X1 )
                                                             => ( X2 @ X3 ) ) )
                                                   => ( ! [X1: $i,X2: $i > $o] :
                                                          ( ! [X3: $i] :
                                                              ( ( in @ X3 @ X1 )
                                                             => ~ ( X2 @ X3 ) )
                                                         => ! [X3: $i] :
                                                              ( ( in @ X3 @ X1 )
                                                             => ~ ( X2 @ X3 ) ) )
                                                     => ( ! [X1: $i,X2: $i > $o] :
                                                            ( ! [X3: $i] :
                                                                ( ( in @ X3 @ X1 )
                                                               => ~ ( X2 @ X3 ) )
                                                           => ! [X3: $i] :
                                                                ( ( in @ X3 @ X1 )
                                                               => ~ ( X2 @ X3 ) ) )
                                                       => ( ! [X1: $i,X2: $i > $o] :
                                                              ( ~ ! [X3: $i] :
                                                                    ( ( in @ X3 @ X1 )
                                                                   => ( X2 @ X3 ) )
                                                             => ~ ! [X3: $i] :
                                                                    ( ( in @ X3 @ X1 )
                                                                   => ( X2 @ X3 ) ) )
                                                         => ( ! [X1: $o] :
                                                                ( X1
                                                               => ( in @ emptyset @ ( prop2set @ X1 ) ) )
                                                           => ( ! [X1: $o] :
                                                                  ( X1
                                                                 => ( set2prop @ ( prop2set @ X1 ) ) )
                                                             => ( ! [X1: $i,X2: $i > $o] :
                                                                    ( ! [X3: $i] :
                                                                        ( ( in @ X3 @ X1 )
                                                                       => ~ ( X2 @ X3 ) )
                                                                   => ! [X3: $i] :
                                                                        ( ( in @ X3 @ X1 )
                                                                       => ~ ( X2 @ X3 ) ) )
                                                               => ( ! [X1: $i,X2: $i > $o] :
                                                                      ( ~ ! [X3: $i] :
                                                                            ( ( in @ X3 @ X1 )
                                                                           => ( X2 @ X3 ) )
                                                                     => ~ ! [X3: $i] :
                                                                            ( ( in @ X3 @ X1 )
                                                                           => ( X2 @ X3 ) ) )
                                                                 => ( ! [X1: $i > $o] :
                                                                        ( ~ ! [X2: $i] :
                                                                              ( ( X1 @ X2 )
                                                                             => ~ ! [X3: $i] :
                                                                                    ( ( X1 @ X3 )
                                                                                   => ( X2 = X3 ) ) )
                                                                       => ~ ! [X2: $i] :
                                                                              ( ( X1 @ X2 )
                                                                             => ~ ! [X3: $i] :
                                                                                    ( ( X1 @ X3 )
                                                                                   => ( X2 = X3 ) ) ) )
                                                                   => ( ! [X1: $i > $o] :
                                                                          ( ~ ! [X2: $i] :
                                                                                ~ ( X1 @ X2 )
                                                                         => ( ! [X2: $i,X3: $i] :
                                                                                ( ( X1 @ X2 )
                                                                               => ( ( X1 @ X3 )
                                                                                 => ( X2 = X3 ) ) )
                                                                           => ~ ! [X2: $i] :
                                                                                  ( ( X1 @ X2 )
                                                                                 => ~ ! [X3: $i] :
                                                                                        ( ( X1 @ X3 )
                                                                                       => ( X2 = X3 ) ) ) ) )
                                                                     => ! [X1: $i > $o] :
                                                                          ( ~ ! [X2: $i] :
                                                                                ~ ! [X3: $i] :
                                                                                    ( ( X1 @ X3 )
                                                                                    = ( X3 = X2 ) )
                                                                         => ~ ! [X2: $i] :
                                                                                ( ( X1 @ X2 )
                                                                               => ~ ! [X3: $i] :
                                                                                      ( ( X1 @ X3 )
                                                                                     => ( X2 = X3 ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ),
    introduced(assumption,[]) ).

thf(h57,assumption,
    in @ emptyset @ ( setadjoin @ emptyset @ emptyset ),
    introduced(assumption,[]) ).

thf(h58,assumption,
    ~ ( ! [X1: $i,X2: $i,X3: $i] :
          ( ( in @ X3 @ X2 )
         => ( in @ X3 @ ( setadjoin @ X1 @ X2 ) ) )
     => ( ! [X1: $i,X2: $i,X3: $i] :
            ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
           => ! [X4: $o] :
                ( ( ( X3 = X1 )
                 => X4 )
               => ( ( ( in @ X3 @ X2 )
                   => X4 )
                 => X4 ) ) )
       => ( ! [X1: $i,X2: $i,X3: $i] :
              ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
             => ( ( X3 != X1 )
               => ( in @ X3 @ X2 ) ) )
         => ( ! [X1: $i] :
                ( ( dsetconstr @ X1
                  @ ^ [X2: $i] : ~ $false )
                = X1 )
           => ( ! [X1: $i,X2: $i] :
                  ( ! [X3: $i] :
                      ( ( in @ X3 @ X2 )
                     => ( in @ X3 @ X1 ) )
                 => ( in @ X2 @ ( powerset @ X1 ) ) )
             => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
               => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
                 => ( ! [X1: $i,X2: $i,X3: $i] :
                        ( ( in @ X2 @ ( powerset @ X1 ) )
                       => ( ( in @ X3 @ X2 )
                         => ( in @ X3 @ X1 ) ) )
                   => ( ! [X1: $i,X2: $i,X3: $i] :
                          ( ( in @ X2 @ X3 )
                         => ( ( in @ X3 @ X1 )
                           => ( in @ X2 @ ( setunion @ X1 ) ) ) )
                     => ( ! [X1: $i,X2: $i] :
                            ( ( in @ X2 @ ( setunion @ X1 ) )
                           => ! [X3: $o] :
                                ( ! [X4: $i] :
                                    ( ( in @ X2 @ X4 )
                                   => ( ( in @ X4 @ X1 )
                                     => X3 ) )
                               => X3 ) )
                       => ( ! [X1: $i,X2: $i] :
                              ( ( in @ X2 @ X1 )
                             => ( in @ X2 @ ( powerset @ ( setunion @ X1 ) ) ) )
                         => ( ! [X1: $i > $o] :
                                ( ~ ! [X2: $i] :
                                      ( ( X1 @ X2 )
                                     => ~ ! [X3: $i] :
                                            ( ( X1 @ X3 )
                                           => ( X2 = X3 ) ) )
                               => ~ ! [X2: $i] :
                                      ~ ! [X3: $i] :
                                          ( ( X1 @ X3 )
                                          = ( X3 = X2 ) ) )
                           => ( ! [X1: $i] :
                                  ( ( X1 != emptyset )
                                 => ~ ! [X2: $i] :
                                        ~ ( in @ X2 @ X1 ) )
                             => ( ! [X1: $i,X2: $i] :
                                    ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                   => ( X1 = X2 ) )
                               => ( ! [X1: $i,X2: $i] :
                                      ( ( X1 != X2 )
                                     => ~ ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                                 => ( ! [X1: $i,X2: $i] :
                                        ( ( X1 = X2 )
                                       => ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                   => ( ! [X1: $i,X2: $i] :
                                          ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                         => ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                                     => ( ! [X1: $i,X2: $i,X3: $i] :
                                            ( ( in @ X3 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                           => ( ( X3 != X1 )
                                             => ( X3 = X2 ) ) )
                                       => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                         => ( ! [X1: $i,X2: $i] : ( in @ X2 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                           => ( ! [X1: $i,X2: $i > $o] :
                                                  ( ~ ! [X3: $i] :
                                                        ( ( in @ X3 @ X1 )
                                                       => ~ ( X2 @ X3 ) )
                                                 => ( ( dsetconstr @ X1 @ X2 )
                                                   != emptyset ) )
                                             => ( ! [X1: $i > $o,X2: $i] :
                                                    ( ( in @ X2 @ emptyset )
                                                   => ( X1 @ X2 ) )
                                               => ( ! [X1: $i,X2: $i > $o] :
                                                      ( ~ ! [X3: $i] :
                                                            ( ( in @ X3 @ X1 )
                                                           => ( X2 @ X3 ) )
                                                     => ~ ! [X3: $i] :
                                                            ( ( in @ X3 @ X1 )
                                                           => ( X2 @ X3 ) ) )
                                                 => ( ! [X1: $i,X2: $i > $o] :
                                                        ( ! [X3: $i] :
                                                            ( ( in @ X3 @ X1 )
                                                           => ~ ( X2 @ X3 ) )
                                                       => ! [X3: $i] :
                                                            ( ( in @ X3 @ X1 )
                                                           => ~ ( X2 @ X3 ) ) )
                                                   => ( ! [X1: $i,X2: $i > $o] :
                                                          ( ! [X3: $i] :
                                                              ( ( in @ X3 @ X1 )
                                                             => ~ ( X2 @ X3 ) )
                                                         => ! [X3: $i] :
                                                              ( ( in @ X3 @ X1 )
                                                             => ~ ( X2 @ X3 ) ) )
                                                     => ( ! [X1: $i,X2: $i > $o] :
                                                            ( ~ ! [X3: $i] :
                                                                  ( ( in @ X3 @ X1 )
                                                                 => ( X2 @ X3 ) )
                                                           => ~ ! [X3: $i] :
                                                                  ( ( in @ X3 @ X1 )
                                                                 => ( X2 @ X3 ) ) )
                                                       => ( ! [X1: $o] :
                                                              ( X1
                                                             => ( in @ emptyset @ ( prop2set @ X1 ) ) )
                                                         => ( ! [X1: $o] :
                                                                ( X1
                                                               => ( set2prop @ ( prop2set @ X1 ) ) )
                                                           => ( ! [X1: $i,X2: $i > $o] :
                                                                  ( ! [X3: $i] :
                                                                      ( ( in @ X3 @ X1 )
                                                                     => ~ ( X2 @ X3 ) )
                                                                 => ! [X3: $i] :
                                                                      ( ( in @ X3 @ X1 )
                                                                     => ~ ( X2 @ X3 ) ) )
                                                             => ( ! [X1: $i,X2: $i > $o] :
                                                                    ( ~ ! [X3: $i] :
                                                                          ( ( in @ X3 @ X1 )
                                                                         => ( X2 @ X3 ) )
                                                                   => ~ ! [X3: $i] :
                                                                          ( ( in @ X3 @ X1 )
                                                                         => ( X2 @ X3 ) ) )
                                                               => ( ! [X1: $i > $o] :
                                                                      ( ~ ! [X2: $i] :
                                                                            ( ( X1 @ X2 )
                                                                           => ~ ! [X3: $i] :
                                                                                  ( ( X1 @ X3 )
                                                                                 => ( X2 = X3 ) ) )
                                                                     => ~ ! [X2: $i] :
                                                                            ( ( X1 @ X2 )
                                                                           => ~ ! [X3: $i] :
                                                                                  ( ( X1 @ X3 )
                                                                                 => ( X2 = X3 ) ) ) )
                                                                 => ( ! [X1: $i > $o] :
                                                                        ( ~ ! [X2: $i] :
                                                                              ~ ( X1 @ X2 )
                                                                       => ( ! [X2: $i,X3: $i] :
                                                                              ( ( X1 @ X2 )
                                                                             => ( ( X1 @ X3 )
                                                                               => ( X2 = X3 ) ) )
                                                                         => ~ ! [X2: $i] :
                                                                                ( ( X1 @ X2 )
                                                                               => ~ ! [X3: $i] :
                                                                                      ( ( X1 @ X3 )
                                                                                     => ( X2 = X3 ) ) ) ) )
                                                                   => ! [X1: $i > $o] :
                                                                        ( ~ ! [X2: $i] :
                                                                              ~ ! [X3: $i] :
                                                                                  ( ( X1 @ X3 )
                                                                                  = ( X3 = X2 ) )
                                                                       => ~ ! [X2: $i] :
                                                                              ( ( X1 @ X2 )
                                                                             => ~ ! [X3: $i] :
                                                                                    ( ( X1 @ X3 )
                                                                                   => ( X2 = X3 ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ),
    introduced(assumption,[]) ).

thf(h59,assumption,
    ! [X1: $i,X2: $i,X3: $i] :
      ( ( in @ X3 @ X2 )
     => ( in @ X3 @ ( setadjoin @ X1 @ X2 ) ) ),
    introduced(assumption,[]) ).

thf(h60,assumption,
    ~ ( ! [X1: $i,X2: $i,X3: $i] :
          ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
         => ! [X4: $o] :
              ( ( ( X3 = X1 )
               => X4 )
             => ( ( ( in @ X3 @ X2 )
                 => X4 )
               => X4 ) ) )
     => ( ! [X1: $i,X2: $i,X3: $i] :
            ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
           => ( ( X3 != X1 )
             => ( in @ X3 @ X2 ) ) )
       => ( ! [X1: $i] :
              ( ( dsetconstr @ X1
                @ ^ [X2: $i] : ~ $false )
              = X1 )
         => ( ! [X1: $i,X2: $i] :
                ( ! [X3: $i] :
                    ( ( in @ X3 @ X2 )
                   => ( in @ X3 @ X1 ) )
               => ( in @ X2 @ ( powerset @ X1 ) ) )
           => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
             => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
               => ( ! [X1: $i,X2: $i,X3: $i] :
                      ( ( in @ X2 @ ( powerset @ X1 ) )
                     => ( ( in @ X3 @ X2 )
                       => ( in @ X3 @ X1 ) ) )
                 => ( ! [X1: $i,X2: $i,X3: $i] :
                        ( ( in @ X2 @ X3 )
                       => ( ( in @ X3 @ X1 )
                         => ( in @ X2 @ ( setunion @ X1 ) ) ) )
                   => ( ! [X1: $i,X2: $i] :
                          ( ( in @ X2 @ ( setunion @ X1 ) )
                         => ! [X3: $o] :
                              ( ! [X4: $i] :
                                  ( ( in @ X2 @ X4 )
                                 => ( ( in @ X4 @ X1 )
                                   => X3 ) )
                             => X3 ) )
                     => ( ! [X1: $i,X2: $i] :
                            ( ( in @ X2 @ X1 )
                           => ( in @ X2 @ ( powerset @ ( setunion @ X1 ) ) ) )
                       => ( ! [X1: $i > $o] :
                              ( ~ ! [X2: $i] :
                                    ( ( X1 @ X2 )
                                   => ~ ! [X3: $i] :
                                          ( ( X1 @ X3 )
                                         => ( X2 = X3 ) ) )
                             => ~ ! [X2: $i] :
                                    ~ ! [X3: $i] :
                                        ( ( X1 @ X3 )
                                        = ( X3 = X2 ) ) )
                         => ( ! [X1: $i] :
                                ( ( X1 != emptyset )
                               => ~ ! [X2: $i] :
                                      ~ ( in @ X2 @ X1 ) )
                           => ( ! [X1: $i,X2: $i] :
                                  ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                 => ( X1 = X2 ) )
                             => ( ! [X1: $i,X2: $i] :
                                    ( ( X1 != X2 )
                                   => ~ ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                               => ( ! [X1: $i,X2: $i] :
                                      ( ( X1 = X2 )
                                     => ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                 => ( ! [X1: $i,X2: $i] :
                                        ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                       => ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                                   => ( ! [X1: $i,X2: $i,X3: $i] :
                                          ( ( in @ X3 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                         => ( ( X3 != X1 )
                                           => ( X3 = X2 ) ) )
                                     => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                       => ( ! [X1: $i,X2: $i] : ( in @ X2 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                         => ( ! [X1: $i,X2: $i > $o] :
                                                ( ~ ! [X3: $i] :
                                                      ( ( in @ X3 @ X1 )
                                                     => ~ ( X2 @ X3 ) )
                                               => ( ( dsetconstr @ X1 @ X2 )
                                                 != emptyset ) )
                                           => ( ! [X1: $i > $o,X2: $i] :
                                                  ( ( in @ X2 @ emptyset )
                                                 => ( X1 @ X2 ) )
                                             => ( ! [X1: $i,X2: $i > $o] :
                                                    ( ~ ! [X3: $i] :
                                                          ( ( in @ X3 @ X1 )
                                                         => ( X2 @ X3 ) )
                                                   => ~ ! [X3: $i] :
                                                          ( ( in @ X3 @ X1 )
                                                         => ( X2 @ X3 ) ) )
                                               => ( ! [X1: $i,X2: $i > $o] :
                                                      ( ! [X3: $i] :
                                                          ( ( in @ X3 @ X1 )
                                                         => ~ ( X2 @ X3 ) )
                                                     => ! [X3: $i] :
                                                          ( ( in @ X3 @ X1 )
                                                         => ~ ( X2 @ X3 ) ) )
                                                 => ( ! [X1: $i,X2: $i > $o] :
                                                        ( ! [X3: $i] :
                                                            ( ( in @ X3 @ X1 )
                                                           => ~ ( X2 @ X3 ) )
                                                       => ! [X3: $i] :
                                                            ( ( in @ X3 @ X1 )
                                                           => ~ ( X2 @ X3 ) ) )
                                                   => ( ! [X1: $i,X2: $i > $o] :
                                                          ( ~ ! [X3: $i] :
                                                                ( ( in @ X3 @ X1 )
                                                               => ( X2 @ X3 ) )
                                                         => ~ ! [X3: $i] :
                                                                ( ( in @ X3 @ X1 )
                                                               => ( X2 @ X3 ) ) )
                                                     => ( ! [X1: $o] :
                                                            ( X1
                                                           => ( in @ emptyset @ ( prop2set @ X1 ) ) )
                                                       => ( ! [X1: $o] :
                                                              ( X1
                                                             => ( set2prop @ ( prop2set @ X1 ) ) )
                                                         => ( ! [X1: $i,X2: $i > $o] :
                                                                ( ! [X3: $i] :
                                                                    ( ( in @ X3 @ X1 )
                                                                   => ~ ( X2 @ X3 ) )
                                                               => ! [X3: $i] :
                                                                    ( ( in @ X3 @ X1 )
                                                                   => ~ ( X2 @ X3 ) ) )
                                                           => ( ! [X1: $i,X2: $i > $o] :
                                                                  ( ~ ! [X3: $i] :
                                                                        ( ( in @ X3 @ X1 )
                                                                       => ( X2 @ X3 ) )
                                                                 => ~ ! [X3: $i] :
                                                                        ( ( in @ X3 @ X1 )
                                                                       => ( X2 @ X3 ) ) )
                                                             => ( ! [X1: $i > $o] :
                                                                    ( ~ ! [X2: $i] :
                                                                          ( ( X1 @ X2 )
                                                                         => ~ ! [X3: $i] :
                                                                                ( ( X1 @ X3 )
                                                                               => ( X2 = X3 ) ) )
                                                                   => ~ ! [X2: $i] :
                                                                          ( ( X1 @ X2 )
                                                                         => ~ ! [X3: $i] :
                                                                                ( ( X1 @ X3 )
                                                                               => ( X2 = X3 ) ) ) )
                                                               => ( ! [X1: $i > $o] :
                                                                      ( ~ ! [X2: $i] :
                                                                            ~ ( X1 @ X2 )
                                                                     => ( ! [X2: $i,X3: $i] :
                                                                            ( ( X1 @ X2 )
                                                                           => ( ( X1 @ X3 )
                                                                             => ( X2 = X3 ) ) )
                                                                       => ~ ! [X2: $i] :
                                                                              ( ( X1 @ X2 )
                                                                             => ~ ! [X3: $i] :
                                                                                    ( ( X1 @ X3 )
                                                                                   => ( X2 = X3 ) ) ) ) )
                                                                 => ! [X1: $i > $o] :
                                                                      ( ~ ! [X2: $i] :
                                                                            ~ ! [X3: $i] :
                                                                                ( ( X1 @ X3 )
                                                                                = ( X3 = X2 ) )
                                                                     => ~ ! [X2: $i] :
                                                                            ( ( X1 @ X2 )
                                                                           => ~ ! [X3: $i] :
                                                                                  ( ( X1 @ X3 )
                                                                                 => ( X2 = X3 ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ),
    introduced(assumption,[]) ).

thf(h61,assumption,
    ! [X1: $i,X2: $i,X3: $i] :
      ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
     => ! [X4: $o] :
          ( ( ( X3 = X1 )
           => X4 )
         => ( ( ( in @ X3 @ X2 )
             => X4 )
           => X4 ) ) ),
    introduced(assumption,[]) ).

thf(h62,assumption,
    ~ ( ! [X1: $i,X2: $i,X3: $i] :
          ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
         => ( ( X3 != X1 )
           => ( in @ X3 @ X2 ) ) )
     => ( ! [X1: $i] :
            ( ( dsetconstr @ X1
              @ ^ [X2: $i] : ~ $false )
            = X1 )
       => ( ! [X1: $i,X2: $i] :
              ( ! [X3: $i] :
                  ( ( in @ X3 @ X2 )
                 => ( in @ X3 @ X1 ) )
             => ( in @ X2 @ ( powerset @ X1 ) ) )
         => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
           => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
             => ( ! [X1: $i,X2: $i,X3: $i] :
                    ( ( in @ X2 @ ( powerset @ X1 ) )
                   => ( ( in @ X3 @ X2 )
                     => ( in @ X3 @ X1 ) ) )
               => ( ! [X1: $i,X2: $i,X3: $i] :
                      ( ( in @ X2 @ X3 )
                     => ( ( in @ X3 @ X1 )
                       => ( in @ X2 @ ( setunion @ X1 ) ) ) )
                 => ( ! [X1: $i,X2: $i] :
                        ( ( in @ X2 @ ( setunion @ X1 ) )
                       => ! [X3: $o] :
                            ( ! [X4: $i] :
                                ( ( in @ X2 @ X4 )
                               => ( ( in @ X4 @ X1 )
                                 => X3 ) )
                           => X3 ) )
                   => ( ! [X1: $i,X2: $i] :
                          ( ( in @ X2 @ X1 )
                         => ( in @ X2 @ ( powerset @ ( setunion @ X1 ) ) ) )
                     => ( ! [X1: $i > $o] :
                            ( ~ ! [X2: $i] :
                                  ( ( X1 @ X2 )
                                 => ~ ! [X3: $i] :
                                        ( ( X1 @ X3 )
                                       => ( X2 = X3 ) ) )
                           => ~ ! [X2: $i] :
                                  ~ ! [X3: $i] :
                                      ( ( X1 @ X3 )
                                      = ( X3 = X2 ) ) )
                       => ( ! [X1: $i] :
                              ( ( X1 != emptyset )
                             => ~ ! [X2: $i] :
                                    ~ ( in @ X2 @ X1 ) )
                         => ( ! [X1: $i,X2: $i] :
                                ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                               => ( X1 = X2 ) )
                           => ( ! [X1: $i,X2: $i] :
                                  ( ( X1 != X2 )
                                 => ~ ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                             => ( ! [X1: $i,X2: $i] :
                                    ( ( X1 = X2 )
                                   => ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                               => ( ! [X1: $i,X2: $i] :
                                      ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                     => ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                                 => ( ! [X1: $i,X2: $i,X3: $i] :
                                        ( ( in @ X3 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                       => ( ( X3 != X1 )
                                         => ( X3 = X2 ) ) )
                                   => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                     => ( ! [X1: $i,X2: $i] : ( in @ X2 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                       => ( ! [X1: $i,X2: $i > $o] :
                                              ( ~ ! [X3: $i] :
                                                    ( ( in @ X3 @ X1 )
                                                   => ~ ( X2 @ X3 ) )
                                             => ( ( dsetconstr @ X1 @ X2 )
                                               != emptyset ) )
                                         => ( ! [X1: $i > $o,X2: $i] :
                                                ( ( in @ X2 @ emptyset )
                                               => ( X1 @ X2 ) )
                                           => ( ! [X1: $i,X2: $i > $o] :
                                                  ( ~ ! [X3: $i] :
                                                        ( ( in @ X3 @ X1 )
                                                       => ( X2 @ X3 ) )
                                                 => ~ ! [X3: $i] :
                                                        ( ( in @ X3 @ X1 )
                                                       => ( X2 @ X3 ) ) )
                                             => ( ! [X1: $i,X2: $i > $o] :
                                                    ( ! [X3: $i] :
                                                        ( ( in @ X3 @ X1 )
                                                       => ~ ( X2 @ X3 ) )
                                                   => ! [X3: $i] :
                                                        ( ( in @ X3 @ X1 )
                                                       => ~ ( X2 @ X3 ) ) )
                                               => ( ! [X1: $i,X2: $i > $o] :
                                                      ( ! [X3: $i] :
                                                          ( ( in @ X3 @ X1 )
                                                         => ~ ( X2 @ X3 ) )
                                                     => ! [X3: $i] :
                                                          ( ( in @ X3 @ X1 )
                                                         => ~ ( X2 @ X3 ) ) )
                                                 => ( ! [X1: $i,X2: $i > $o] :
                                                        ( ~ ! [X3: $i] :
                                                              ( ( in @ X3 @ X1 )
                                                             => ( X2 @ X3 ) )
                                                       => ~ ! [X3: $i] :
                                                              ( ( in @ X3 @ X1 )
                                                             => ( X2 @ X3 ) ) )
                                                   => ( ! [X1: $o] :
                                                          ( X1
                                                         => ( in @ emptyset @ ( prop2set @ X1 ) ) )
                                                     => ( ! [X1: $o] :
                                                            ( X1
                                                           => ( set2prop @ ( prop2set @ X1 ) ) )
                                                       => ( ! [X1: $i,X2: $i > $o] :
                                                              ( ! [X3: $i] :
                                                                  ( ( in @ X3 @ X1 )
                                                                 => ~ ( X2 @ X3 ) )
                                                             => ! [X3: $i] :
                                                                  ( ( in @ X3 @ X1 )
                                                                 => ~ ( X2 @ X3 ) ) )
                                                         => ( ! [X1: $i,X2: $i > $o] :
                                                                ( ~ ! [X3: $i] :
                                                                      ( ( in @ X3 @ X1 )
                                                                     => ( X2 @ X3 ) )
                                                               => ~ ! [X3: $i] :
                                                                      ( ( in @ X3 @ X1 )
                                                                     => ( X2 @ X3 ) ) )
                                                           => ( ! [X1: $i > $o] :
                                                                  ( ~ ! [X2: $i] :
                                                                        ( ( X1 @ X2 )
                                                                       => ~ ! [X3: $i] :
                                                                              ( ( X1 @ X3 )
                                                                             => ( X2 = X3 ) ) )
                                                                 => ~ ! [X2: $i] :
                                                                        ( ( X1 @ X2 )
                                                                       => ~ ! [X3: $i] :
                                                                              ( ( X1 @ X3 )
                                                                             => ( X2 = X3 ) ) ) )
                                                             => ( ! [X1: $i > $o] :
                                                                    ( ~ ! [X2: $i] :
                                                                          ~ ( X1 @ X2 )
                                                                   => ( ! [X2: $i,X3: $i] :
                                                                          ( ( X1 @ X2 )
                                                                         => ( ( X1 @ X3 )
                                                                           => ( X2 = X3 ) ) )
                                                                     => ~ ! [X2: $i] :
                                                                            ( ( X1 @ X2 )
                                                                           => ~ ! [X3: $i] :
                                                                                  ( ( X1 @ X3 )
                                                                                 => ( X2 = X3 ) ) ) ) )
                                                               => ! [X1: $i > $o] :
                                                                    ( ~ ! [X2: $i] :
                                                                          ~ ! [X3: $i] :
                                                                              ( ( X1 @ X3 )
                                                                              = ( X3 = X2 ) )
                                                                   => ~ ! [X2: $i] :
                                                                          ( ( X1 @ X2 )
                                                                         => ~ ! [X3: $i] :
                                                                                ( ( X1 @ X3 )
                                                                               => ( X2 = X3 ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ),
    introduced(assumption,[]) ).

thf(h63,assumption,
    ! [X1: $i,X2: $i,X3: $i] :
      ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
     => ( ( X3 != X1 )
       => ( in @ X3 @ X2 ) ) ),
    introduced(assumption,[]) ).

thf(h64,assumption,
    ~ ( ! [X1: $i] :
          ( ( dsetconstr @ X1
            @ ^ [X2: $i] : ~ $false )
          = X1 )
     => ( ! [X1: $i,X2: $i] :
            ( ! [X3: $i] :
                ( ( in @ X3 @ X2 )
               => ( in @ X3 @ X1 ) )
           => ( in @ X2 @ ( powerset @ X1 ) ) )
       => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
         => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
           => ( ! [X1: $i,X2: $i,X3: $i] :
                  ( ( in @ X2 @ ( powerset @ X1 ) )
                 => ( ( in @ X3 @ X2 )
                   => ( in @ X3 @ X1 ) ) )
             => ( ! [X1: $i,X2: $i,X3: $i] :
                    ( ( in @ X2 @ X3 )
                   => ( ( in @ X3 @ X1 )
                     => ( in @ X2 @ ( setunion @ X1 ) ) ) )
               => ( ! [X1: $i,X2: $i] :
                      ( ( in @ X2 @ ( setunion @ X1 ) )
                     => ! [X3: $o] :
                          ( ! [X4: $i] :
                              ( ( in @ X2 @ X4 )
                             => ( ( in @ X4 @ X1 )
                               => X3 ) )
                         => X3 ) )
                 => ( ! [X1: $i,X2: $i] :
                        ( ( in @ X2 @ X1 )
                       => ( in @ X2 @ ( powerset @ ( setunion @ X1 ) ) ) )
                   => ( ! [X1: $i > $o] :
                          ( ~ ! [X2: $i] :
                                ( ( X1 @ X2 )
                               => ~ ! [X3: $i] :
                                      ( ( X1 @ X3 )
                                     => ( X2 = X3 ) ) )
                         => ~ ! [X2: $i] :
                                ~ ! [X3: $i] :
                                    ( ( X1 @ X3 )
                                    = ( X3 = X2 ) ) )
                     => ( ! [X1: $i] :
                            ( ( X1 != emptyset )
                           => ~ ! [X2: $i] :
                                  ~ ( in @ X2 @ X1 ) )
                       => ( ! [X1: $i,X2: $i] :
                              ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                             => ( X1 = X2 ) )
                         => ( ! [X1: $i,X2: $i] :
                                ( ( X1 != X2 )
                               => ~ ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                           => ( ! [X1: $i,X2: $i] :
                                  ( ( X1 = X2 )
                                 => ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                             => ( ! [X1: $i,X2: $i] :
                                    ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                   => ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                               => ( ! [X1: $i,X2: $i,X3: $i] :
                                      ( ( in @ X3 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                     => ( ( X3 != X1 )
                                       => ( X3 = X2 ) ) )
                                 => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                   => ( ! [X1: $i,X2: $i] : ( in @ X2 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                     => ( ! [X1: $i,X2: $i > $o] :
                                            ( ~ ! [X3: $i] :
                                                  ( ( in @ X3 @ X1 )
                                                 => ~ ( X2 @ X3 ) )
                                           => ( ( dsetconstr @ X1 @ X2 )
                                             != emptyset ) )
                                       => ( ! [X1: $i > $o,X2: $i] :
                                              ( ( in @ X2 @ emptyset )
                                             => ( X1 @ X2 ) )
                                         => ( ! [X1: $i,X2: $i > $o] :
                                                ( ~ ! [X3: $i] :
                                                      ( ( in @ X3 @ X1 )
                                                     => ( X2 @ X3 ) )
                                               => ~ ! [X3: $i] :
                                                      ( ( in @ X3 @ X1 )
                                                     => ( X2 @ X3 ) ) )
                                           => ( ! [X1: $i,X2: $i > $o] :
                                                  ( ! [X3: $i] :
                                                      ( ( in @ X3 @ X1 )
                                                     => ~ ( X2 @ X3 ) )
                                                 => ! [X3: $i] :
                                                      ( ( in @ X3 @ X1 )
                                                     => ~ ( X2 @ X3 ) ) )
                                             => ( ! [X1: $i,X2: $i > $o] :
                                                    ( ! [X3: $i] :
                                                        ( ( in @ X3 @ X1 )
                                                       => ~ ( X2 @ X3 ) )
                                                   => ! [X3: $i] :
                                                        ( ( in @ X3 @ X1 )
                                                       => ~ ( X2 @ X3 ) ) )
                                               => ( ! [X1: $i,X2: $i > $o] :
                                                      ( ~ ! [X3: $i] :
                                                            ( ( in @ X3 @ X1 )
                                                           => ( X2 @ X3 ) )
                                                     => ~ ! [X3: $i] :
                                                            ( ( in @ X3 @ X1 )
                                                           => ( X2 @ X3 ) ) )
                                                 => ( ! [X1: $o] :
                                                        ( X1
                                                       => ( in @ emptyset @ ( prop2set @ X1 ) ) )
                                                   => ( ! [X1: $o] :
                                                          ( X1
                                                         => ( set2prop @ ( prop2set @ X1 ) ) )
                                                     => ( ! [X1: $i,X2: $i > $o] :
                                                            ( ! [X3: $i] :
                                                                ( ( in @ X3 @ X1 )
                                                               => ~ ( X2 @ X3 ) )
                                                           => ! [X3: $i] :
                                                                ( ( in @ X3 @ X1 )
                                                               => ~ ( X2 @ X3 ) ) )
                                                       => ( ! [X1: $i,X2: $i > $o] :
                                                              ( ~ ! [X3: $i] :
                                                                    ( ( in @ X3 @ X1 )
                                                                   => ( X2 @ X3 ) )
                                                             => ~ ! [X3: $i] :
                                                                    ( ( in @ X3 @ X1 )
                                                                   => ( X2 @ X3 ) ) )
                                                         => ( ! [X1: $i > $o] :
                                                                ( ~ ! [X2: $i] :
                                                                      ( ( X1 @ X2 )
                                                                     => ~ ! [X3: $i] :
                                                                            ( ( X1 @ X3 )
                                                                           => ( X2 = X3 ) ) )
                                                               => ~ ! [X2: $i] :
                                                                      ( ( X1 @ X2 )
                                                                     => ~ ! [X3: $i] :
                                                                            ( ( X1 @ X3 )
                                                                           => ( X2 = X3 ) ) ) )
                                                           => ( ! [X1: $i > $o] :
                                                                  ( ~ ! [X2: $i] :
                                                                        ~ ( X1 @ X2 )
                                                                 => ( ! [X2: $i,X3: $i] :
                                                                        ( ( X1 @ X2 )
                                                                       => ( ( X1 @ X3 )
                                                                         => ( X2 = X3 ) ) )
                                                                   => ~ ! [X2: $i] :
                                                                          ( ( X1 @ X2 )
                                                                         => ~ ! [X3: $i] :
                                                                                ( ( X1 @ X3 )
                                                                               => ( X2 = X3 ) ) ) ) )
                                                             => ! [X1: $i > $o] :
                                                                  ( ~ ! [X2: $i] :
                                                                        ~ ! [X3: $i] :
                                                                            ( ( X1 @ X3 )
                                                                            = ( X3 = X2 ) )
                                                                 => ~ ! [X2: $i] :
                                                                        ( ( X1 @ X2 )
                                                                       => ~ ! [X3: $i] :
                                                                              ( ( X1 @ X3 )
                                                                             => ( X2 = X3 ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ),
    introduced(assumption,[]) ).

thf(h65,assumption,
    ! [X1: $i] :
      ( ( dsetconstr @ X1
        @ ^ [X2: $i] : ~ $false )
      = X1 ),
    introduced(assumption,[]) ).

thf(h66,assumption,
    ~ ( ! [X1: $i,X2: $i] :
          ( ! [X3: $i] :
              ( ( in @ X3 @ X2 )
             => ( in @ X3 @ X1 ) )
         => ( in @ X2 @ ( powerset @ X1 ) ) )
     => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
       => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
         => ( ! [X1: $i,X2: $i,X3: $i] :
                ( ( in @ X2 @ ( powerset @ X1 ) )
               => ( ( in @ X3 @ X2 )
                 => ( in @ X3 @ X1 ) ) )
           => ( ! [X1: $i,X2: $i,X3: $i] :
                  ( ( in @ X2 @ X3 )
                 => ( ( in @ X3 @ X1 )
                   => ( in @ X2 @ ( setunion @ X1 ) ) ) )
             => ( ! [X1: $i,X2: $i] :
                    ( ( in @ X2 @ ( setunion @ X1 ) )
                   => ! [X3: $o] :
                        ( ! [X4: $i] :
                            ( ( in @ X2 @ X4 )
                           => ( ( in @ X4 @ X1 )
                             => X3 ) )
                       => X3 ) )
               => ( ! [X1: $i,X2: $i] :
                      ( ( in @ X2 @ X1 )
                     => ( in @ X2 @ ( powerset @ ( setunion @ X1 ) ) ) )
                 => ( ! [X1: $i > $o] :
                        ( ~ ! [X2: $i] :
                              ( ( X1 @ X2 )
                             => ~ ! [X3: $i] :
                                    ( ( X1 @ X3 )
                                   => ( X2 = X3 ) ) )
                       => ~ ! [X2: $i] :
                              ~ ! [X3: $i] :
                                  ( ( X1 @ X3 )
                                  = ( X3 = X2 ) ) )
                   => ( ! [X1: $i] :
                          ( ( X1 != emptyset )
                         => ~ ! [X2: $i] :
                                ~ ( in @ X2 @ X1 ) )
                     => ( ! [X1: $i,X2: $i] :
                            ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                           => ( X1 = X2 ) )
                       => ( ! [X1: $i,X2: $i] :
                              ( ( X1 != X2 )
                             => ~ ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                         => ( ! [X1: $i,X2: $i] :
                                ( ( X1 = X2 )
                               => ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                           => ( ! [X1: $i,X2: $i] :
                                  ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                 => ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                             => ( ! [X1: $i,X2: $i,X3: $i] :
                                    ( ( in @ X3 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                   => ( ( X3 != X1 )
                                     => ( X3 = X2 ) ) )
                               => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                 => ( ! [X1: $i,X2: $i] : ( in @ X2 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                   => ( ! [X1: $i,X2: $i > $o] :
                                          ( ~ ! [X3: $i] :
                                                ( ( in @ X3 @ X1 )
                                               => ~ ( X2 @ X3 ) )
                                         => ( ( dsetconstr @ X1 @ X2 )
                                           != emptyset ) )
                                     => ( ! [X1: $i > $o,X2: $i] :
                                            ( ( in @ X2 @ emptyset )
                                           => ( X1 @ X2 ) )
                                       => ( ! [X1: $i,X2: $i > $o] :
                                              ( ~ ! [X3: $i] :
                                                    ( ( in @ X3 @ X1 )
                                                   => ( X2 @ X3 ) )
                                             => ~ ! [X3: $i] :
                                                    ( ( in @ X3 @ X1 )
                                                   => ( X2 @ X3 ) ) )
                                         => ( ! [X1: $i,X2: $i > $o] :
                                                ( ! [X3: $i] :
                                                    ( ( in @ X3 @ X1 )
                                                   => ~ ( X2 @ X3 ) )
                                               => ! [X3: $i] :
                                                    ( ( in @ X3 @ X1 )
                                                   => ~ ( X2 @ X3 ) ) )
                                           => ( ! [X1: $i,X2: $i > $o] :
                                                  ( ! [X3: $i] :
                                                      ( ( in @ X3 @ X1 )
                                                     => ~ ( X2 @ X3 ) )
                                                 => ! [X3: $i] :
                                                      ( ( in @ X3 @ X1 )
                                                     => ~ ( X2 @ X3 ) ) )
                                             => ( ! [X1: $i,X2: $i > $o] :
                                                    ( ~ ! [X3: $i] :
                                                          ( ( in @ X3 @ X1 )
                                                         => ( X2 @ X3 ) )
                                                   => ~ ! [X3: $i] :
                                                          ( ( in @ X3 @ X1 )
                                                         => ( X2 @ X3 ) ) )
                                               => ( ! [X1: $o] :
                                                      ( X1
                                                     => ( in @ emptyset @ ( prop2set @ X1 ) ) )
                                                 => ( ! [X1: $o] :
                                                        ( X1
                                                       => ( set2prop @ ( prop2set @ X1 ) ) )
                                                   => ( ! [X1: $i,X2: $i > $o] :
                                                          ( ! [X3: $i] :
                                                              ( ( in @ X3 @ X1 )
                                                             => ~ ( X2 @ X3 ) )
                                                         => ! [X3: $i] :
                                                              ( ( in @ X3 @ X1 )
                                                             => ~ ( X2 @ X3 ) ) )
                                                     => ( ! [X1: $i,X2: $i > $o] :
                                                            ( ~ ! [X3: $i] :
                                                                  ( ( in @ X3 @ X1 )
                                                                 => ( X2 @ X3 ) )
                                                           => ~ ! [X3: $i] :
                                                                  ( ( in @ X3 @ X1 )
                                                                 => ( X2 @ X3 ) ) )
                                                       => ( ! [X1: $i > $o] :
                                                              ( ~ ! [X2: $i] :
                                                                    ( ( X1 @ X2 )
                                                                   => ~ ! [X3: $i] :
                                                                          ( ( X1 @ X3 )
                                                                         => ( X2 = X3 ) ) )
                                                             => ~ ! [X2: $i] :
                                                                    ( ( X1 @ X2 )
                                                                   => ~ ! [X3: $i] :
                                                                          ( ( X1 @ X3 )
                                                                         => ( X2 = X3 ) ) ) )
                                                         => ( ! [X1: $i > $o] :
                                                                ( ~ ! [X2: $i] :
                                                                      ~ ( X1 @ X2 )
                                                               => ( ! [X2: $i,X3: $i] :
                                                                      ( ( X1 @ X2 )
                                                                     => ( ( X1 @ X3 )
                                                                       => ( X2 = X3 ) ) )
                                                                 => ~ ! [X2: $i] :
                                                                        ( ( X1 @ X2 )
                                                                       => ~ ! [X3: $i] :
                                                                              ( ( X1 @ X3 )
                                                                             => ( X2 = X3 ) ) ) ) )
                                                           => ! [X1: $i > $o] :
                                                                ( ~ ! [X2: $i] :
                                                                      ~ ! [X3: $i] :
                                                                          ( ( X1 @ X3 )
                                                                          = ( X3 = X2 ) )
                                                               => ~ ! [X2: $i] :
                                                                      ( ( X1 @ X2 )
                                                                     => ~ ! [X3: $i] :
                                                                            ( ( X1 @ X3 )
                                                                           => ( X2 = X3 ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ),
    introduced(assumption,[]) ).

thf(h67,assumption,
    ! [X1: $i,X2: $i] :
      ( ! [X3: $i] :
          ( ( in @ X3 @ X2 )
         => ( in @ X3 @ X1 ) )
     => ( in @ X2 @ ( powerset @ X1 ) ) ),
    introduced(assumption,[]) ).

thf(h68,assumption,
    ~ ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
     => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
       => ( ! [X1: $i,X2: $i,X3: $i] :
              ( ( in @ X2 @ ( powerset @ X1 ) )
             => ( ( in @ X3 @ X2 )
               => ( in @ X3 @ X1 ) ) )
         => ( ! [X1: $i,X2: $i,X3: $i] :
                ( ( in @ X2 @ X3 )
               => ( ( in @ X3 @ X1 )
                 => ( in @ X2 @ ( setunion @ X1 ) ) ) )
           => ( ! [X1: $i,X2: $i] :
                  ( ( in @ X2 @ ( setunion @ X1 ) )
                 => ! [X3: $o] :
                      ( ! [X4: $i] :
                          ( ( in @ X2 @ X4 )
                         => ( ( in @ X4 @ X1 )
                           => X3 ) )
                     => X3 ) )
             => ( ! [X1: $i,X2: $i] :
                    ( ( in @ X2 @ X1 )
                   => ( in @ X2 @ ( powerset @ ( setunion @ X1 ) ) ) )
               => ( ! [X1: $i > $o] :
                      ( ~ ! [X2: $i] :
                            ( ( X1 @ X2 )
                           => ~ ! [X3: $i] :
                                  ( ( X1 @ X3 )
                                 => ( X2 = X3 ) ) )
                     => ~ ! [X2: $i] :
                            ~ ! [X3: $i] :
                                ( ( X1 @ X3 )
                                = ( X3 = X2 ) ) )
                 => ( ! [X1: $i] :
                        ( ( X1 != emptyset )
                       => ~ ! [X2: $i] :
                              ~ ( in @ X2 @ X1 ) )
                   => ( ! [X1: $i,X2: $i] :
                          ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                         => ( X1 = X2 ) )
                     => ( ! [X1: $i,X2: $i] :
                            ( ( X1 != X2 )
                           => ~ ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                       => ( ! [X1: $i,X2: $i] :
                              ( ( X1 = X2 )
                             => ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                         => ( ! [X1: $i,X2: $i] :
                                ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                               => ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                           => ( ! [X1: $i,X2: $i,X3: $i] :
                                  ( ( in @ X3 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                 => ( ( X3 != X1 )
                                   => ( X3 = X2 ) ) )
                             => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                               => ( ! [X1: $i,X2: $i] : ( in @ X2 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                 => ( ! [X1: $i,X2: $i > $o] :
                                        ( ~ ! [X3: $i] :
                                              ( ( in @ X3 @ X1 )
                                             => ~ ( X2 @ X3 ) )
                                       => ( ( dsetconstr @ X1 @ X2 )
                                         != emptyset ) )
                                   => ( ! [X1: $i > $o,X2: $i] :
                                          ( ( in @ X2 @ emptyset )
                                         => ( X1 @ X2 ) )
                                     => ( ! [X1: $i,X2: $i > $o] :
                                            ( ~ ! [X3: $i] :
                                                  ( ( in @ X3 @ X1 )
                                                 => ( X2 @ X3 ) )
                                           => ~ ! [X3: $i] :
                                                  ( ( in @ X3 @ X1 )
                                                 => ( X2 @ X3 ) ) )
                                       => ( ! [X1: $i,X2: $i > $o] :
                                              ( ! [X3: $i] :
                                                  ( ( in @ X3 @ X1 )
                                                 => ~ ( X2 @ X3 ) )
                                             => ! [X3: $i] :
                                                  ( ( in @ X3 @ X1 )
                                                 => ~ ( X2 @ X3 ) ) )
                                         => ( ! [X1: $i,X2: $i > $o] :
                                                ( ! [X3: $i] :
                                                    ( ( in @ X3 @ X1 )
                                                   => ~ ( X2 @ X3 ) )
                                               => ! [X3: $i] :
                                                    ( ( in @ X3 @ X1 )
                                                   => ~ ( X2 @ X3 ) ) )
                                           => ( ! [X1: $i,X2: $i > $o] :
                                                  ( ~ ! [X3: $i] :
                                                        ( ( in @ X3 @ X1 )
                                                       => ( X2 @ X3 ) )
                                                 => ~ ! [X3: $i] :
                                                        ( ( in @ X3 @ X1 )
                                                       => ( X2 @ X3 ) ) )
                                             => ( ! [X1: $o] :
                                                    ( X1
                                                   => ( in @ emptyset @ ( prop2set @ X1 ) ) )
                                               => ( ! [X1: $o] :
                                                      ( X1
                                                     => ( set2prop @ ( prop2set @ X1 ) ) )
                                                 => ( ! [X1: $i,X2: $i > $o] :
                                                        ( ! [X3: $i] :
                                                            ( ( in @ X3 @ X1 )
                                                           => ~ ( X2 @ X3 ) )
                                                       => ! [X3: $i] :
                                                            ( ( in @ X3 @ X1 )
                                                           => ~ ( X2 @ X3 ) ) )
                                                   => ( ! [X1: $i,X2: $i > $o] :
                                                          ( ~ ! [X3: $i] :
                                                                ( ( in @ X3 @ X1 )
                                                               => ( X2 @ X3 ) )
                                                         => ~ ! [X3: $i] :
                                                                ( ( in @ X3 @ X1 )
                                                               => ( X2 @ X3 ) ) )
                                                     => ( ! [X1: $i > $o] :
                                                            ( ~ ! [X2: $i] :
                                                                  ( ( X1 @ X2 )
                                                                 => ~ ! [X3: $i] :
                                                                        ( ( X1 @ X3 )
                                                                       => ( X2 = X3 ) ) )
                                                           => ~ ! [X2: $i] :
                                                                  ( ( X1 @ X2 )
                                                                 => ~ ! [X3: $i] :
                                                                        ( ( X1 @ X3 )
                                                                       => ( X2 = X3 ) ) ) )
                                                       => ( ! [X1: $i > $o] :
                                                              ( ~ ! [X2: $i] :
                                                                    ~ ( X1 @ X2 )
                                                             => ( ! [X2: $i,X3: $i] :
                                                                    ( ( X1 @ X2 )
                                                                   => ( ( X1 @ X3 )
                                                                     => ( X2 = X3 ) ) )
                                                               => ~ ! [X2: $i] :
                                                                      ( ( X1 @ X2 )
                                                                     => ~ ! [X3: $i] :
                                                                            ( ( X1 @ X3 )
                                                                           => ( X2 = X3 ) ) ) ) )
                                                         => ! [X1: $i > $o] :
                                                              ( ~ ! [X2: $i] :
                                                                    ~ ! [X3: $i] :
                                                                        ( ( X1 @ X3 )
                                                                        = ( X3 = X2 ) )
                                                             => ~ ! [X2: $i] :
                                                                    ( ( X1 @ X2 )
                                                                   => ~ ! [X3: $i] :
                                                                          ( ( X1 @ X3 )
                                                                         => ( X2 = X3 ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ),
    introduced(assumption,[]) ).

thf(h69,assumption,
    ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) ),
    introduced(assumption,[]) ).

thf(h70,assumption,
    ~ ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
     => ( ! [X1: $i,X2: $i,X3: $i] :
            ( ( in @ X2 @ ( powerset @ X1 ) )
           => ( ( in @ X3 @ X2 )
             => ( in @ X3 @ X1 ) ) )
       => ( ! [X1: $i,X2: $i,X3: $i] :
              ( ( in @ X2 @ X3 )
             => ( ( in @ X3 @ X1 )
               => ( in @ X2 @ ( setunion @ X1 ) ) ) )
         => ( ! [X1: $i,X2: $i] :
                ( ( in @ X2 @ ( setunion @ X1 ) )
               => ! [X3: $o] :
                    ( ! [X4: $i] :
                        ( ( in @ X2 @ X4 )
                       => ( ( in @ X4 @ X1 )
                         => X3 ) )
                   => X3 ) )
           => ( ! [X1: $i,X2: $i] :
                  ( ( in @ X2 @ X1 )
                 => ( in @ X2 @ ( powerset @ ( setunion @ X1 ) ) ) )
             => ( ! [X1: $i > $o] :
                    ( ~ ! [X2: $i] :
                          ( ( X1 @ X2 )
                         => ~ ! [X3: $i] :
                                ( ( X1 @ X3 )
                               => ( X2 = X3 ) ) )
                   => ~ ! [X2: $i] :
                          ~ ! [X3: $i] :
                              ( ( X1 @ X3 )
                              = ( X3 = X2 ) ) )
               => ( ! [X1: $i] :
                      ( ( X1 != emptyset )
                     => ~ ! [X2: $i] :
                            ~ ( in @ X2 @ X1 ) )
                 => ( ! [X1: $i,X2: $i] :
                        ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                       => ( X1 = X2 ) )
                   => ( ! [X1: $i,X2: $i] :
                          ( ( X1 != X2 )
                         => ~ ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                     => ( ! [X1: $i,X2: $i] :
                            ( ( X1 = X2 )
                           => ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                       => ( ! [X1: $i,X2: $i] :
                              ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                             => ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                         => ( ! [X1: $i,X2: $i,X3: $i] :
                                ( ( in @ X3 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                               => ( ( X3 != X1 )
                                 => ( X3 = X2 ) ) )
                           => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                             => ( ! [X1: $i,X2: $i] : ( in @ X2 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                               => ( ! [X1: $i,X2: $i > $o] :
                                      ( ~ ! [X3: $i] :
                                            ( ( in @ X3 @ X1 )
                                           => ~ ( X2 @ X3 ) )
                                     => ( ( dsetconstr @ X1 @ X2 )
                                       != emptyset ) )
                                 => ( ! [X1: $i > $o,X2: $i] :
                                        ( ( in @ X2 @ emptyset )
                                       => ( X1 @ X2 ) )
                                   => ( ! [X1: $i,X2: $i > $o] :
                                          ( ~ ! [X3: $i] :
                                                ( ( in @ X3 @ X1 )
                                               => ( X2 @ X3 ) )
                                         => ~ ! [X3: $i] :
                                                ( ( in @ X3 @ X1 )
                                               => ( X2 @ X3 ) ) )
                                     => ( ! [X1: $i,X2: $i > $o] :
                                            ( ! [X3: $i] :
                                                ( ( in @ X3 @ X1 )
                                               => ~ ( X2 @ X3 ) )
                                           => ! [X3: $i] :
                                                ( ( in @ X3 @ X1 )
                                               => ~ ( X2 @ X3 ) ) )
                                       => ( ! [X1: $i,X2: $i > $o] :
                                              ( ! [X3: $i] :
                                                  ( ( in @ X3 @ X1 )
                                                 => ~ ( X2 @ X3 ) )
                                             => ! [X3: $i] :
                                                  ( ( in @ X3 @ X1 )
                                                 => ~ ( X2 @ X3 ) ) )
                                         => ( ! [X1: $i,X2: $i > $o] :
                                                ( ~ ! [X3: $i] :
                                                      ( ( in @ X3 @ X1 )
                                                     => ( X2 @ X3 ) )
                                               => ~ ! [X3: $i] :
                                                      ( ( in @ X3 @ X1 )
                                                     => ( X2 @ X3 ) ) )
                                           => ( ! [X1: $o] :
                                                  ( X1
                                                 => ( in @ emptyset @ ( prop2set @ X1 ) ) )
                                             => ( ! [X1: $o] :
                                                    ( X1
                                                   => ( set2prop @ ( prop2set @ X1 ) ) )
                                               => ( ! [X1: $i,X2: $i > $o] :
                                                      ( ! [X3: $i] :
                                                          ( ( in @ X3 @ X1 )
                                                         => ~ ( X2 @ X3 ) )
                                                     => ! [X3: $i] :
                                                          ( ( in @ X3 @ X1 )
                                                         => ~ ( X2 @ X3 ) ) )
                                                 => ( ! [X1: $i,X2: $i > $o] :
                                                        ( ~ ! [X3: $i] :
                                                              ( ( in @ X3 @ X1 )
                                                             => ( X2 @ X3 ) )
                                                       => ~ ! [X3: $i] :
                                                              ( ( in @ X3 @ X1 )
                                                             => ( X2 @ X3 ) ) )
                                                   => ( ! [X1: $i > $o] :
                                                          ( ~ ! [X2: $i] :
                                                                ( ( X1 @ X2 )
                                                               => ~ ! [X3: $i] :
                                                                      ( ( X1 @ X3 )
                                                                     => ( X2 = X3 ) ) )
                                                         => ~ ! [X2: $i] :
                                                                ( ( X1 @ X2 )
                                                               => ~ ! [X3: $i] :
                                                                      ( ( X1 @ X3 )
                                                                     => ( X2 = X3 ) ) ) )
                                                     => ( ! [X1: $i > $o] :
                                                            ( ~ ! [X2: $i] :
                                                                  ~ ( X1 @ X2 )
                                                           => ( ! [X2: $i,X3: $i] :
                                                                  ( ( X1 @ X2 )
                                                                 => ( ( X1 @ X3 )
                                                                   => ( X2 = X3 ) ) )
                                                             => ~ ! [X2: $i] :
                                                                    ( ( X1 @ X2 )
                                                                   => ~ ! [X3: $i] :
                                                                          ( ( X1 @ X3 )
                                                                         => ( X2 = X3 ) ) ) ) )
                                                       => ! [X1: $i > $o] :
                                                            ( ~ ! [X2: $i] :
                                                                  ~ ! [X3: $i] :
                                                                      ( ( X1 @ X3 )
                                                                      = ( X3 = X2 ) )
                                                           => ~ ! [X2: $i] :
                                                                  ( ( X1 @ X2 )
                                                                 => ~ ! [X3: $i] :
                                                                        ( ( X1 @ X3 )
                                                                       => ( X2 = X3 ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ),
    introduced(assumption,[]) ).

thf(h71,assumption,
    ~ ( ! [X1: $i,X2: $i,X3: $i] :
          ( ( in @ X2 @ ( powerset @ X1 ) )
         => ( ( in @ X3 @ X2 )
           => ( in @ X3 @ X1 ) ) )
     => ( ! [X1: $i,X2: $i,X3: $i] :
            ( ( in @ X2 @ X3 )
           => ( ( in @ X3 @ X1 )
             => ( in @ X2 @ ( setunion @ X1 ) ) ) )
       => ( ! [X1: $i,X2: $i] :
              ( ( in @ X2 @ ( setunion @ X1 ) )
             => ! [X3: $o] :
                  ( ! [X4: $i] :
                      ( ( in @ X2 @ X4 )
                     => ( ( in @ X4 @ X1 )
                       => X3 ) )
                 => X3 ) )
         => ( ! [X1: $i,X2: $i] :
                ( ( in @ X2 @ X1 )
               => ( in @ X2 @ ( powerset @ ( setunion @ X1 ) ) ) )
           => ( ! [X1: $i > $o] :
                  ( ~ ! [X2: $i] :
                        ( ( X1 @ X2 )
                       => ~ ! [X3: $i] :
                              ( ( X1 @ X3 )
                             => ( X2 = X3 ) ) )
                 => ~ ! [X2: $i] :
                        ~ ! [X3: $i] :
                            ( ( X1 @ X3 )
                            = ( X3 = X2 ) ) )
             => ( ! [X1: $i] :
                    ( ( X1 != emptyset )
                   => ~ ! [X2: $i] :
                          ~ ( in @ X2 @ X1 ) )
               => ( ! [X1: $i,X2: $i] :
                      ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                     => ( X1 = X2 ) )
                 => ( ! [X1: $i,X2: $i] :
                        ( ( X1 != X2 )
                       => ~ ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                   => ( ! [X1: $i,X2: $i] :
                          ( ( X1 = X2 )
                         => ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                     => ( ! [X1: $i,X2: $i] :
                            ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                           => ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                       => ( ! [X1: $i,X2: $i,X3: $i] :
                              ( ( in @ X3 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                             => ( ( X3 != X1 )
                               => ( X3 = X2 ) ) )
                         => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                           => ( ! [X1: $i,X2: $i] : ( in @ X2 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                             => ( ! [X1: $i,X2: $i > $o] :
                                    ( ~ ! [X3: $i] :
                                          ( ( in @ X3 @ X1 )
                                         => ~ ( X2 @ X3 ) )
                                   => ( ( dsetconstr @ X1 @ X2 )
                                     != emptyset ) )
                               => ( ! [X1: $i > $o,X2: $i] :
                                      ( ( in @ X2 @ emptyset )
                                     => ( X1 @ X2 ) )
                                 => ( ! [X1: $i,X2: $i > $o] :
                                        ( ~ ! [X3: $i] :
                                              ( ( in @ X3 @ X1 )
                                             => ( X2 @ X3 ) )
                                       => ~ ! [X3: $i] :
                                              ( ( in @ X3 @ X1 )
                                             => ( X2 @ X3 ) ) )
                                   => ( ! [X1: $i,X2: $i > $o] :
                                          ( ! [X3: $i] :
                                              ( ( in @ X3 @ X1 )
                                             => ~ ( X2 @ X3 ) )
                                         => ! [X3: $i] :
                                              ( ( in @ X3 @ X1 )
                                             => ~ ( X2 @ X3 ) ) )
                                     => ( ! [X1: $i,X2: $i > $o] :
                                            ( ! [X3: $i] :
                                                ( ( in @ X3 @ X1 )
                                               => ~ ( X2 @ X3 ) )
                                           => ! [X3: $i] :
                                                ( ( in @ X3 @ X1 )
                                               => ~ ( X2 @ X3 ) ) )
                                       => ( ! [X1: $i,X2: $i > $o] :
                                              ( ~ ! [X3: $i] :
                                                    ( ( in @ X3 @ X1 )
                                                   => ( X2 @ X3 ) )
                                             => ~ ! [X3: $i] :
                                                    ( ( in @ X3 @ X1 )
                                                   => ( X2 @ X3 ) ) )
                                         => ( ! [X1: $o] :
                                                ( X1
                                               => ( in @ emptyset @ ( prop2set @ X1 ) ) )
                                           => ( ! [X1: $o] :
                                                  ( X1
                                                 => ( set2prop @ ( prop2set @ X1 ) ) )
                                             => ( ! [X1: $i,X2: $i > $o] :
                                                    ( ! [X3: $i] :
                                                        ( ( in @ X3 @ X1 )
                                                       => ~ ( X2 @ X3 ) )
                                                   => ! [X3: $i] :
                                                        ( ( in @ X3 @ X1 )
                                                       => ~ ( X2 @ X3 ) ) )
                                               => ( ! [X1: $i,X2: $i > $o] :
                                                      ( ~ ! [X3: $i] :
                                                            ( ( in @ X3 @ X1 )
                                                           => ( X2 @ X3 ) )
                                                     => ~ ! [X3: $i] :
                                                            ( ( in @ X3 @ X1 )
                                                           => ( X2 @ X3 ) ) )
                                                 => ( ! [X1: $i > $o] :
                                                        ( ~ ! [X2: $i] :
                                                              ( ( X1 @ X2 )
                                                             => ~ ! [X3: $i] :
                                                                    ( ( X1 @ X3 )
                                                                   => ( X2 = X3 ) ) )
                                                       => ~ ! [X2: $i] :
                                                              ( ( X1 @ X2 )
                                                             => ~ ! [X3: $i] :
                                                                    ( ( X1 @ X3 )
                                                                   => ( X2 = X3 ) ) ) )
                                                   => ( ! [X1: $i > $o] :
                                                          ( ~ ! [X2: $i] :
                                                                ~ ( X1 @ X2 )
                                                         => ( ! [X2: $i,X3: $i] :
                                                                ( ( X1 @ X2 )
                                                               => ( ( X1 @ X3 )
                                                                 => ( X2 = X3 ) ) )
                                                           => ~ ! [X2: $i] :
                                                                  ( ( X1 @ X2 )
                                                                 => ~ ! [X3: $i] :
                                                                        ( ( X1 @ X3 )
                                                                       => ( X2 = X3 ) ) ) ) )
                                                     => ! [X1: $i > $o] :
                                                          ( ~ ! [X2: $i] :
                                                                ~ ! [X3: $i] :
                                                                    ( ( X1 @ X3 )
                                                                    = ( X3 = X2 ) )
                                                         => ~ ! [X2: $i] :
                                                                ( ( X1 @ X2 )
                                                               => ~ ! [X3: $i] :
                                                                      ( ( X1 @ X3 )
                                                                     => ( X2 = X3 ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ),
    introduced(assumption,[]) ).

thf(h72,assumption,
    ! [X1: $i,X2: $i,X3: $i] :
      ( ( in @ X2 @ ( powerset @ X1 ) )
     => ( ( in @ X3 @ X2 )
       => ( in @ X3 @ X1 ) ) ),
    introduced(assumption,[]) ).

thf(h73,assumption,
    ~ ( ! [X1: $i,X2: $i,X3: $i] :
          ( ( in @ X2 @ X3 )
         => ( ( in @ X3 @ X1 )
           => ( in @ X2 @ ( setunion @ X1 ) ) ) )
     => ( ! [X1: $i,X2: $i] :
            ( ( in @ X2 @ ( setunion @ X1 ) )
           => ! [X3: $o] :
                ( ! [X4: $i] :
                    ( ( in @ X2 @ X4 )
                   => ( ( in @ X4 @ X1 )
                     => X3 ) )
               => X3 ) )
       => ( ! [X1: $i,X2: $i] :
              ( ( in @ X2 @ X1 )
             => ( in @ X2 @ ( powerset @ ( setunion @ X1 ) ) ) )
         => ( ! [X1: $i > $o] :
                ( ~ ! [X2: $i] :
                      ( ( X1 @ X2 )
                     => ~ ! [X3: $i] :
                            ( ( X1 @ X3 )
                           => ( X2 = X3 ) ) )
               => ~ ! [X2: $i] :
                      ~ ! [X3: $i] :
                          ( ( X1 @ X3 )
                          = ( X3 = X2 ) ) )
           => ( ! [X1: $i] :
                  ( ( X1 != emptyset )
                 => ~ ! [X2: $i] :
                        ~ ( in @ X2 @ X1 ) )
             => ( ! [X1: $i,X2: $i] :
                    ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                   => ( X1 = X2 ) )
               => ( ! [X1: $i,X2: $i] :
                      ( ( X1 != X2 )
                     => ~ ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                 => ( ! [X1: $i,X2: $i] :
                        ( ( X1 = X2 )
                       => ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                   => ( ! [X1: $i,X2: $i] :
                          ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                         => ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                     => ( ! [X1: $i,X2: $i,X3: $i] :
                            ( ( in @ X3 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                           => ( ( X3 != X1 )
                             => ( X3 = X2 ) ) )
                       => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                         => ( ! [X1: $i,X2: $i] : ( in @ X2 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                           => ( ! [X1: $i,X2: $i > $o] :
                                  ( ~ ! [X3: $i] :
                                        ( ( in @ X3 @ X1 )
                                       => ~ ( X2 @ X3 ) )
                                 => ( ( dsetconstr @ X1 @ X2 )
                                   != emptyset ) )
                             => ( ! [X1: $i > $o,X2: $i] :
                                    ( ( in @ X2 @ emptyset )
                                   => ( X1 @ X2 ) )
                               => ( ! [X1: $i,X2: $i > $o] :
                                      ( ~ ! [X3: $i] :
                                            ( ( in @ X3 @ X1 )
                                           => ( X2 @ X3 ) )
                                     => ~ ! [X3: $i] :
                                            ( ( in @ X3 @ X1 )
                                           => ( X2 @ X3 ) ) )
                                 => ( ! [X1: $i,X2: $i > $o] :
                                        ( ! [X3: $i] :
                                            ( ( in @ X3 @ X1 )
                                           => ~ ( X2 @ X3 ) )
                                       => ! [X3: $i] :
                                            ( ( in @ X3 @ X1 )
                                           => ~ ( X2 @ X3 ) ) )
                                   => ( ! [X1: $i,X2: $i > $o] :
                                          ( ! [X3: $i] :
                                              ( ( in @ X3 @ X1 )
                                             => ~ ( X2 @ X3 ) )
                                         => ! [X3: $i] :
                                              ( ( in @ X3 @ X1 )
                                             => ~ ( X2 @ X3 ) ) )
                                     => ( ! [X1: $i,X2: $i > $o] :
                                            ( ~ ! [X3: $i] :
                                                  ( ( in @ X3 @ X1 )
                                                 => ( X2 @ X3 ) )
                                           => ~ ! [X3: $i] :
                                                  ( ( in @ X3 @ X1 )
                                                 => ( X2 @ X3 ) ) )
                                       => ( ! [X1: $o] :
                                              ( X1
                                             => ( in @ emptyset @ ( prop2set @ X1 ) ) )
                                         => ( ! [X1: $o] :
                                                ( X1
                                               => ( set2prop @ ( prop2set @ X1 ) ) )
                                           => ( ! [X1: $i,X2: $i > $o] :
                                                  ( ! [X3: $i] :
                                                      ( ( in @ X3 @ X1 )
                                                     => ~ ( X2 @ X3 ) )
                                                 => ! [X3: $i] :
                                                      ( ( in @ X3 @ X1 )
                                                     => ~ ( X2 @ X3 ) ) )
                                             => ( ! [X1: $i,X2: $i > $o] :
                                                    ( ~ ! [X3: $i] :
                                                          ( ( in @ X3 @ X1 )
                                                         => ( X2 @ X3 ) )
                                                   => ~ ! [X3: $i] :
                                                          ( ( in @ X3 @ X1 )
                                                         => ( X2 @ X3 ) ) )
                                               => ( ! [X1: $i > $o] :
                                                      ( ~ ! [X2: $i] :
                                                            ( ( X1 @ X2 )
                                                           => ~ ! [X3: $i] :
                                                                  ( ( X1 @ X3 )
                                                                 => ( X2 = X3 ) ) )
                                                     => ~ ! [X2: $i] :
                                                            ( ( X1 @ X2 )
                                                           => ~ ! [X3: $i] :
                                                                  ( ( X1 @ X3 )
                                                                 => ( X2 = X3 ) ) ) )
                                                 => ( ! [X1: $i > $o] :
                                                        ( ~ ! [X2: $i] :
                                                              ~ ( X1 @ X2 )
                                                       => ( ! [X2: $i,X3: $i] :
                                                              ( ( X1 @ X2 )
                                                             => ( ( X1 @ X3 )
                                                               => ( X2 = X3 ) ) )
                                                         => ~ ! [X2: $i] :
                                                                ( ( X1 @ X2 )
                                                               => ~ ! [X3: $i] :
                                                                      ( ( X1 @ X3 )
                                                                     => ( X2 = X3 ) ) ) ) )
                                                   => ! [X1: $i > $o] :
                                                        ( ~ ! [X2: $i] :
                                                              ~ ! [X3: $i] :
                                                                  ( ( X1 @ X3 )
                                                                  = ( X3 = X2 ) )
                                                       => ~ ! [X2: $i] :
                                                              ( ( X1 @ X2 )
                                                             => ~ ! [X3: $i] :
                                                                    ( ( X1 @ X3 )
                                                                   => ( X2 = X3 ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ),
    introduced(assumption,[]) ).

thf(h74,assumption,
    ! [X1: $i,X2: $i,X3: $i] :
      ( ( in @ X2 @ X3 )
     => ( ( in @ X3 @ X1 )
       => ( in @ X2 @ ( setunion @ X1 ) ) ) ),
    introduced(assumption,[]) ).

thf(h75,assumption,
    ~ ( ! [X1: $i,X2: $i] :
          ( ( in @ X2 @ ( setunion @ X1 ) )
         => ! [X3: $o] :
              ( ! [X4: $i] :
                  ( ( in @ X2 @ X4 )
                 => ( ( in @ X4 @ X1 )
                   => X3 ) )
             => X3 ) )
     => ( ! [X1: $i,X2: $i] :
            ( ( in @ X2 @ X1 )
           => ( in @ X2 @ ( powerset @ ( setunion @ X1 ) ) ) )
       => ( ! [X1: $i > $o] :
              ( ~ ! [X2: $i] :
                    ( ( X1 @ X2 )
                   => ~ ! [X3: $i] :
                          ( ( X1 @ X3 )
                         => ( X2 = X3 ) ) )
             => ~ ! [X2: $i] :
                    ~ ! [X3: $i] :
                        ( ( X1 @ X3 )
                        = ( X3 = X2 ) ) )
         => ( ! [X1: $i] :
                ( ( X1 != emptyset )
               => ~ ! [X2: $i] :
                      ~ ( in @ X2 @ X1 ) )
           => ( ! [X1: $i,X2: $i] :
                  ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                 => ( X1 = X2 ) )
             => ( ! [X1: $i,X2: $i] :
                    ( ( X1 != X2 )
                   => ~ ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
               => ( ! [X1: $i,X2: $i] :
                      ( ( X1 = X2 )
                     => ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                 => ( ! [X1: $i,X2: $i] :
                        ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                       => ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                   => ( ! [X1: $i,X2: $i,X3: $i] :
                          ( ( in @ X3 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                         => ( ( X3 != X1 )
                           => ( X3 = X2 ) ) )
                     => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                       => ( ! [X1: $i,X2: $i] : ( in @ X2 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                         => ( ! [X1: $i,X2: $i > $o] :
                                ( ~ ! [X3: $i] :
                                      ( ( in @ X3 @ X1 )
                                     => ~ ( X2 @ X3 ) )
                               => ( ( dsetconstr @ X1 @ X2 )
                                 != emptyset ) )
                           => ( ! [X1: $i > $o,X2: $i] :
                                  ( ( in @ X2 @ emptyset )
                                 => ( X1 @ X2 ) )
                             => ( ! [X1: $i,X2: $i > $o] :
                                    ( ~ ! [X3: $i] :
                                          ( ( in @ X3 @ X1 )
                                         => ( X2 @ X3 ) )
                                   => ~ ! [X3: $i] :
                                          ( ( in @ X3 @ X1 )
                                         => ( X2 @ X3 ) ) )
                               => ( ! [X1: $i,X2: $i > $o] :
                                      ( ! [X3: $i] :
                                          ( ( in @ X3 @ X1 )
                                         => ~ ( X2 @ X3 ) )
                                     => ! [X3: $i] :
                                          ( ( in @ X3 @ X1 )
                                         => ~ ( X2 @ X3 ) ) )
                                 => ( ! [X1: $i,X2: $i > $o] :
                                        ( ! [X3: $i] :
                                            ( ( in @ X3 @ X1 )
                                           => ~ ( X2 @ X3 ) )
                                       => ! [X3: $i] :
                                            ( ( in @ X3 @ X1 )
                                           => ~ ( X2 @ X3 ) ) )
                                   => ( ! [X1: $i,X2: $i > $o] :
                                          ( ~ ! [X3: $i] :
                                                ( ( in @ X3 @ X1 )
                                               => ( X2 @ X3 ) )
                                         => ~ ! [X3: $i] :
                                                ( ( in @ X3 @ X1 )
                                               => ( X2 @ X3 ) ) )
                                     => ( ! [X1: $o] :
                                            ( X1
                                           => ( in @ emptyset @ ( prop2set @ X1 ) ) )
                                       => ( ! [X1: $o] :
                                              ( X1
                                             => ( set2prop @ ( prop2set @ X1 ) ) )
                                         => ( ! [X1: $i,X2: $i > $o] :
                                                ( ! [X3: $i] :
                                                    ( ( in @ X3 @ X1 )
                                                   => ~ ( X2 @ X3 ) )
                                               => ! [X3: $i] :
                                                    ( ( in @ X3 @ X1 )
                                                   => ~ ( X2 @ X3 ) ) )
                                           => ( ! [X1: $i,X2: $i > $o] :
                                                  ( ~ ! [X3: $i] :
                                                        ( ( in @ X3 @ X1 )
                                                       => ( X2 @ X3 ) )
                                                 => ~ ! [X3: $i] :
                                                        ( ( in @ X3 @ X1 )
                                                       => ( X2 @ X3 ) ) )
                                             => ( ! [X1: $i > $o] :
                                                    ( ~ ! [X2: $i] :
                                                          ( ( X1 @ X2 )
                                                         => ~ ! [X3: $i] :
                                                                ( ( X1 @ X3 )
                                                               => ( X2 = X3 ) ) )
                                                   => ~ ! [X2: $i] :
                                                          ( ( X1 @ X2 )
                                                         => ~ ! [X3: $i] :
                                                                ( ( X1 @ X3 )
                                                               => ( X2 = X3 ) ) ) )
                                               => ( ! [X1: $i > $o] :
                                                      ( ~ ! [X2: $i] :
                                                            ~ ( X1 @ X2 )
                                                     => ( ! [X2: $i,X3: $i] :
                                                            ( ( X1 @ X2 )
                                                           => ( ( X1 @ X3 )
                                                             => ( X2 = X3 ) ) )
                                                       => ~ ! [X2: $i] :
                                                              ( ( X1 @ X2 )
                                                             => ~ ! [X3: $i] :
                                                                    ( ( X1 @ X3 )
                                                                   => ( X2 = X3 ) ) ) ) )
                                                 => ! [X1: $i > $o] :
                                                      ( ~ ! [X2: $i] :
                                                            ~ ! [X3: $i] :
                                                                ( ( X1 @ X3 )
                                                                = ( X3 = X2 ) )
                                                     => ~ ! [X2: $i] :
                                                            ( ( X1 @ X2 )
                                                           => ~ ! [X3: $i] :
                                                                  ( ( X1 @ X3 )
                                                                 => ( X2 = X3 ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ),
    introduced(assumption,[]) ).

thf(h76,assumption,
    ! [X1: $i,X2: $i] :
      ( ( in @ X2 @ ( setunion @ X1 ) )
     => ! [X3: $o] :
          ( ! [X4: $i] :
              ( ( in @ X2 @ X4 )
             => ( ( in @ X4 @ X1 )
               => X3 ) )
         => X3 ) ),
    introduced(assumption,[]) ).

thf(h77,assumption,
    ~ ( ! [X1: $i,X2: $i] :
          ( ( in @ X2 @ X1 )
         => ( in @ X2 @ ( powerset @ ( setunion @ X1 ) ) ) )
     => ( ! [X1: $i > $o] :
            ( ~ ! [X2: $i] :
                  ( ( X1 @ X2 )
                 => ~ ! [X3: $i] :
                        ( ( X1 @ X3 )
                       => ( X2 = X3 ) ) )
           => ~ ! [X2: $i] :
                  ~ ! [X3: $i] :
                      ( ( X1 @ X3 )
                      = ( X3 = X2 ) ) )
       => ( ! [X1: $i] :
              ( ( X1 != emptyset )
             => ~ ! [X2: $i] :
                    ~ ( in @ X2 @ X1 ) )
         => ( ! [X1: $i,X2: $i] :
                ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
               => ( X1 = X2 ) )
           => ( ! [X1: $i,X2: $i] :
                  ( ( X1 != X2 )
                 => ~ ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
             => ( ! [X1: $i,X2: $i] :
                    ( ( X1 = X2 )
                   => ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
               => ( ! [X1: $i,X2: $i] :
                      ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                     => ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                 => ( ! [X1: $i,X2: $i,X3: $i] :
                        ( ( in @ X3 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                       => ( ( X3 != X1 )
                         => ( X3 = X2 ) ) )
                   => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                     => ( ! [X1: $i,X2: $i] : ( in @ X2 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                       => ( ! [X1: $i,X2: $i > $o] :
                              ( ~ ! [X3: $i] :
                                    ( ( in @ X3 @ X1 )
                                   => ~ ( X2 @ X3 ) )
                             => ( ( dsetconstr @ X1 @ X2 )
                               != emptyset ) )
                         => ( ! [X1: $i > $o,X2: $i] :
                                ( ( in @ X2 @ emptyset )
                               => ( X1 @ X2 ) )
                           => ( ! [X1: $i,X2: $i > $o] :
                                  ( ~ ! [X3: $i] :
                                        ( ( in @ X3 @ X1 )
                                       => ( X2 @ X3 ) )
                                 => ~ ! [X3: $i] :
                                        ( ( in @ X3 @ X1 )
                                       => ( X2 @ X3 ) ) )
                             => ( ! [X1: $i,X2: $i > $o] :
                                    ( ! [X3: $i] :
                                        ( ( in @ X3 @ X1 )
                                       => ~ ( X2 @ X3 ) )
                                   => ! [X3: $i] :
                                        ( ( in @ X3 @ X1 )
                                       => ~ ( X2 @ X3 ) ) )
                               => ( ! [X1: $i,X2: $i > $o] :
                                      ( ! [X3: $i] :
                                          ( ( in @ X3 @ X1 )
                                         => ~ ( X2 @ X3 ) )
                                     => ! [X3: $i] :
                                          ( ( in @ X3 @ X1 )
                                         => ~ ( X2 @ X3 ) ) )
                                 => ( ! [X1: $i,X2: $i > $o] :
                                        ( ~ ! [X3: $i] :
                                              ( ( in @ X3 @ X1 )
                                             => ( X2 @ X3 ) )
                                       => ~ ! [X3: $i] :
                                              ( ( in @ X3 @ X1 )
                                             => ( X2 @ X3 ) ) )
                                   => ( ! [X1: $o] :
                                          ( X1
                                         => ( in @ emptyset @ ( prop2set @ X1 ) ) )
                                     => ( ! [X1: $o] :
                                            ( X1
                                           => ( set2prop @ ( prop2set @ X1 ) ) )
                                       => ( ! [X1: $i,X2: $i > $o] :
                                              ( ! [X3: $i] :
                                                  ( ( in @ X3 @ X1 )
                                                 => ~ ( X2 @ X3 ) )
                                             => ! [X3: $i] :
                                                  ( ( in @ X3 @ X1 )
                                                 => ~ ( X2 @ X3 ) ) )
                                         => ( ! [X1: $i,X2: $i > $o] :
                                                ( ~ ! [X3: $i] :
                                                      ( ( in @ X3 @ X1 )
                                                     => ( X2 @ X3 ) )
                                               => ~ ! [X3: $i] :
                                                      ( ( in @ X3 @ X1 )
                                                     => ( X2 @ X3 ) ) )
                                           => ( ! [X1: $i > $o] :
                                                  ( ~ ! [X2: $i] :
                                                        ( ( X1 @ X2 )
                                                       => ~ ! [X3: $i] :
                                                              ( ( X1 @ X3 )
                                                             => ( X2 = X3 ) ) )
                                                 => ~ ! [X2: $i] :
                                                        ( ( X1 @ X2 )
                                                       => ~ ! [X3: $i] :
                                                              ( ( X1 @ X3 )
                                                             => ( X2 = X3 ) ) ) )
                                             => ( ! [X1: $i > $o] :
                                                    ( ~ ! [X2: $i] :
                                                          ~ ( X1 @ X2 )
                                                   => ( ! [X2: $i,X3: $i] :
                                                          ( ( X1 @ X2 )
                                                         => ( ( X1 @ X3 )
                                                           => ( X2 = X3 ) ) )
                                                     => ~ ! [X2: $i] :
                                                            ( ( X1 @ X2 )
                                                           => ~ ! [X3: $i] :
                                                                  ( ( X1 @ X3 )
                                                                 => ( X2 = X3 ) ) ) ) )
                                               => ! [X1: $i > $o] :
                                                    ( ~ ! [X2: $i] :
                                                          ~ ! [X3: $i] :
                                                              ( ( X1 @ X3 )
                                                              = ( X3 = X2 ) )
                                                   => ~ ! [X2: $i] :
                                                          ( ( X1 @ X2 )
                                                         => ~ ! [X3: $i] :
                                                                ( ( X1 @ X3 )
                                                               => ( X2 = X3 ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ),
    introduced(assumption,[]) ).

thf(h78,assumption,
    ! [X1: $i,X2: $i] :
      ( ( in @ X2 @ X1 )
     => ( in @ X2 @ ( powerset @ ( setunion @ X1 ) ) ) ),
    introduced(assumption,[]) ).

thf(h79,assumption,
    ~ ( ! [X1: $i > $o] :
          ( ~ ! [X2: $i] :
                ( ( X1 @ X2 )
               => ~ ! [X3: $i] :
                      ( ( X1 @ X3 )
                     => ( X2 = X3 ) ) )
         => ~ ! [X2: $i] :
                ~ ! [X3: $i] :
                    ( ( X1 @ X3 )
                    = ( X3 = X2 ) ) )
     => ( ! [X1: $i] :
            ( ( X1 != emptyset )
           => ~ ! [X2: $i] :
                  ~ ( in @ X2 @ X1 ) )
       => ( ! [X1: $i,X2: $i] :
              ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
             => ( X1 = X2 ) )
         => ( ! [X1: $i,X2: $i] :
                ( ( X1 != X2 )
               => ~ ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
           => ( ! [X1: $i,X2: $i] :
                  ( ( X1 = X2 )
                 => ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
             => ( ! [X1: $i,X2: $i] :
                    ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                   => ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
               => ( ! [X1: $i,X2: $i,X3: $i] :
                      ( ( in @ X3 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                     => ( ( X3 != X1 )
                       => ( X3 = X2 ) ) )
                 => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                   => ( ! [X1: $i,X2: $i] : ( in @ X2 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                     => ( ! [X1: $i,X2: $i > $o] :
                            ( ~ ! [X3: $i] :
                                  ( ( in @ X3 @ X1 )
                                 => ~ ( X2 @ X3 ) )
                           => ( ( dsetconstr @ X1 @ X2 )
                             != emptyset ) )
                       => ( ! [X1: $i > $o,X2: $i] :
                              ( ( in @ X2 @ emptyset )
                             => ( X1 @ X2 ) )
                         => ( ! [X1: $i,X2: $i > $o] :
                                ( ~ ! [X3: $i] :
                                      ( ( in @ X3 @ X1 )
                                     => ( X2 @ X3 ) )
                               => ~ ! [X3: $i] :
                                      ( ( in @ X3 @ X1 )
                                     => ( X2 @ X3 ) ) )
                           => ( ! [X1: $i,X2: $i > $o] :
                                  ( ! [X3: $i] :
                                      ( ( in @ X3 @ X1 )
                                     => ~ ( X2 @ X3 ) )
                                 => ! [X3: $i] :
                                      ( ( in @ X3 @ X1 )
                                     => ~ ( X2 @ X3 ) ) )
                             => ( ! [X1: $i,X2: $i > $o] :
                                    ( ! [X3: $i] :
                                        ( ( in @ X3 @ X1 )
                                       => ~ ( X2 @ X3 ) )
                                   => ! [X3: $i] :
                                        ( ( in @ X3 @ X1 )
                                       => ~ ( X2 @ X3 ) ) )
                               => ( ! [X1: $i,X2: $i > $o] :
                                      ( ~ ! [X3: $i] :
                                            ( ( in @ X3 @ X1 )
                                           => ( X2 @ X3 ) )
                                     => ~ ! [X3: $i] :
                                            ( ( in @ X3 @ X1 )
                                           => ( X2 @ X3 ) ) )
                                 => ( ! [X1: $o] :
                                        ( X1
                                       => ( in @ emptyset @ ( prop2set @ X1 ) ) )
                                   => ( ! [X1: $o] :
                                          ( X1
                                         => ( set2prop @ ( prop2set @ X1 ) ) )
                                     => ( ! [X1: $i,X2: $i > $o] :
                                            ( ! [X3: $i] :
                                                ( ( in @ X3 @ X1 )
                                               => ~ ( X2 @ X3 ) )
                                           => ! [X3: $i] :
                                                ( ( in @ X3 @ X1 )
                                               => ~ ( X2 @ X3 ) ) )
                                       => ( ! [X1: $i,X2: $i > $o] :
                                              ( ~ ! [X3: $i] :
                                                    ( ( in @ X3 @ X1 )
                                                   => ( X2 @ X3 ) )
                                             => ~ ! [X3: $i] :
                                                    ( ( in @ X3 @ X1 )
                                                   => ( X2 @ X3 ) ) )
                                         => ( ! [X1: $i > $o] :
                                                ( ~ ! [X2: $i] :
                                                      ( ( X1 @ X2 )
                                                     => ~ ! [X3: $i] :
                                                            ( ( X1 @ X3 )
                                                           => ( X2 = X3 ) ) )
                                               => ~ ! [X2: $i] :
                                                      ( ( X1 @ X2 )
                                                     => ~ ! [X3: $i] :
                                                            ( ( X1 @ X3 )
                                                           => ( X2 = X3 ) ) ) )
                                           => ( ! [X1: $i > $o] :
                                                  ( ~ ! [X2: $i] :
                                                        ~ ( X1 @ X2 )
                                                 => ( ! [X2: $i,X3: $i] :
                                                        ( ( X1 @ X2 )
                                                       => ( ( X1 @ X3 )
                                                         => ( X2 = X3 ) ) )
                                                   => ~ ! [X2: $i] :
                                                          ( ( X1 @ X2 )
                                                         => ~ ! [X3: $i] :
                                                                ( ( X1 @ X3 )
                                                               => ( X2 = X3 ) ) ) ) )
                                             => ! [X1: $i > $o] :
                                                  ( ~ ! [X2: $i] :
                                                        ~ ! [X3: $i] :
                                                            ( ( X1 @ X3 )
                                                            = ( X3 = X2 ) )
                                                 => ~ ! [X2: $i] :
                                                        ( ( X1 @ X2 )
                                                       => ~ ! [X3: $i] :
                                                              ( ( X1 @ X3 )
                                                             => ( X2 = X3 ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ),
    introduced(assumption,[]) ).

thf(h80,assumption,
    ! [X1: $i > $o] :
      ( ~ ! [X2: $i] :
            ( ( X1 @ X2 )
           => ~ ! [X3: $i] :
                  ( ( X1 @ X3 )
                 => ( X2 = X3 ) ) )
     => ~ ! [X2: $i] :
            ~ ! [X3: $i] :
                ( ( X1 @ X3 )
                = ( X3 = X2 ) ) ),
    introduced(assumption,[]) ).

thf(h81,assumption,
    ~ ( ! [X1: $i] :
          ( ( X1 != emptyset )
         => ~ ! [X2: $i] :
                ~ ( in @ X2 @ X1 ) )
     => ( ! [X1: $i,X2: $i] :
            ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
           => ( X1 = X2 ) )
       => ( ! [X1: $i,X2: $i] :
              ( ( X1 != X2 )
             => ~ ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
         => ( ! [X1: $i,X2: $i] :
                ( ( X1 = X2 )
               => ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
           => ( ! [X1: $i,X2: $i] :
                  ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                 => ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
             => ( ! [X1: $i,X2: $i,X3: $i] :
                    ( ( in @ X3 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                   => ( ( X3 != X1 )
                     => ( X3 = X2 ) ) )
               => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                 => ( ! [X1: $i,X2: $i] : ( in @ X2 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                   => ( ! [X1: $i,X2: $i > $o] :
                          ( ~ ! [X3: $i] :
                                ( ( in @ X3 @ X1 )
                               => ~ ( X2 @ X3 ) )
                         => ( ( dsetconstr @ X1 @ X2 )
                           != emptyset ) )
                     => ( ! [X1: $i > $o,X2: $i] :
                            ( ( in @ X2 @ emptyset )
                           => ( X1 @ X2 ) )
                       => ( ! [X1: $i,X2: $i > $o] :
                              ( ~ ! [X3: $i] :
                                    ( ( in @ X3 @ X1 )
                                   => ( X2 @ X3 ) )
                             => ~ ! [X3: $i] :
                                    ( ( in @ X3 @ X1 )
                                   => ( X2 @ X3 ) ) )
                         => ( ! [X1: $i,X2: $i > $o] :
                                ( ! [X3: $i] :
                                    ( ( in @ X3 @ X1 )
                                   => ~ ( X2 @ X3 ) )
                               => ! [X3: $i] :
                                    ( ( in @ X3 @ X1 )
                                   => ~ ( X2 @ X3 ) ) )
                           => ( ! [X1: $i,X2: $i > $o] :
                                  ( ! [X3: $i] :
                                      ( ( in @ X3 @ X1 )
                                     => ~ ( X2 @ X3 ) )
                                 => ! [X3: $i] :
                                      ( ( in @ X3 @ X1 )
                                     => ~ ( X2 @ X3 ) ) )
                             => ( ! [X1: $i,X2: $i > $o] :
                                    ( ~ ! [X3: $i] :
                                          ( ( in @ X3 @ X1 )
                                         => ( X2 @ X3 ) )
                                   => ~ ! [X3: $i] :
                                          ( ( in @ X3 @ X1 )
                                         => ( X2 @ X3 ) ) )
                               => ( ! [X1: $o] :
                                      ( X1
                                     => ( in @ emptyset @ ( prop2set @ X1 ) ) )
                                 => ( ! [X1: $o] :
                                        ( X1
                                       => ( set2prop @ ( prop2set @ X1 ) ) )
                                   => ( ! [X1: $i,X2: $i > $o] :
                                          ( ! [X3: $i] :
                                              ( ( in @ X3 @ X1 )
                                             => ~ ( X2 @ X3 ) )
                                         => ! [X3: $i] :
                                              ( ( in @ X3 @ X1 )
                                             => ~ ( X2 @ X3 ) ) )
                                     => ( ! [X1: $i,X2: $i > $o] :
                                            ( ~ ! [X3: $i] :
                                                  ( ( in @ X3 @ X1 )
                                                 => ( X2 @ X3 ) )
                                           => ~ ! [X3: $i] :
                                                  ( ( in @ X3 @ X1 )
                                                 => ( X2 @ X3 ) ) )
                                       => ( ! [X1: $i > $o] :
                                              ( ~ ! [X2: $i] :
                                                    ( ( X1 @ X2 )
                                                   => ~ ! [X3: $i] :
                                                          ( ( X1 @ X3 )
                                                         => ( X2 = X3 ) ) )
                                             => ~ ! [X2: $i] :
                                                    ( ( X1 @ X2 )
                                                   => ~ ! [X3: $i] :
                                                          ( ( X1 @ X3 )
                                                         => ( X2 = X3 ) ) ) )
                                         => ( ! [X1: $i > $o] :
                                                ( ~ ! [X2: $i] :
                                                      ~ ( X1 @ X2 )
                                               => ( ! [X2: $i,X3: $i] :
                                                      ( ( X1 @ X2 )
                                                     => ( ( X1 @ X3 )
                                                       => ( X2 = X3 ) ) )
                                                 => ~ ! [X2: $i] :
                                                        ( ( X1 @ X2 )
                                                       => ~ ! [X3: $i] :
                                                              ( ( X1 @ X3 )
                                                             => ( X2 = X3 ) ) ) ) )
                                           => ! [X1: $i > $o] :
                                                ( ~ ! [X2: $i] :
                                                      ~ ! [X3: $i] :
                                                          ( ( X1 @ X3 )
                                                          = ( X3 = X2 ) )
                                               => ~ ! [X2: $i] :
                                                      ( ( X1 @ X2 )
                                                     => ~ ! [X3: $i] :
                                                            ( ( X1 @ X3 )
                                                           => ( X2 = X3 ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ),
    introduced(assumption,[]) ).

thf(h82,assumption,
    ~ ( ! [X1: $i,X2: $i] :
          ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
         => ( X1 = X2 ) )
     => ( ! [X1: $i,X2: $i] :
            ( ( X1 != X2 )
           => ~ ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
       => ( ! [X1: $i,X2: $i] :
              ( ( X1 = X2 )
             => ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
         => ( ! [X1: $i,X2: $i] :
                ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
               => ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
           => ( ! [X1: $i,X2: $i,X3: $i] :
                  ( ( in @ X3 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                 => ( ( X3 != X1 )
                   => ( X3 = X2 ) ) )
             => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
               => ( ! [X1: $i,X2: $i] : ( in @ X2 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                 => ( ! [X1: $i,X2: $i > $o] :
                        ( ~ ! [X3: $i] :
                              ( ( in @ X3 @ X1 )
                             => ~ ( X2 @ X3 ) )
                       => ( ( dsetconstr @ X1 @ X2 )
                         != emptyset ) )
                   => ( ! [X1: $i > $o,X2: $i] :
                          ( ( in @ X2 @ emptyset )
                         => ( X1 @ X2 ) )
                     => ( ! [X1: $i,X2: $i > $o] :
                            ( ~ ! [X3: $i] :
                                  ( ( in @ X3 @ X1 )
                                 => ( X2 @ X3 ) )
                           => ~ ! [X3: $i] :
                                  ( ( in @ X3 @ X1 )
                                 => ( X2 @ X3 ) ) )
                       => ( ! [X1: $i,X2: $i > $o] :
                              ( ! [X3: $i] :
                                  ( ( in @ X3 @ X1 )
                                 => ~ ( X2 @ X3 ) )
                             => ! [X3: $i] :
                                  ( ( in @ X3 @ X1 )
                                 => ~ ( X2 @ X3 ) ) )
                         => ( ! [X1: $i,X2: $i > $o] :
                                ( ! [X3: $i] :
                                    ( ( in @ X3 @ X1 )
                                   => ~ ( X2 @ X3 ) )
                               => ! [X3: $i] :
                                    ( ( in @ X3 @ X1 )
                                   => ~ ( X2 @ X3 ) ) )
                           => ( ! [X1: $i,X2: $i > $o] :
                                  ( ~ ! [X3: $i] :
                                        ( ( in @ X3 @ X1 )
                                       => ( X2 @ X3 ) )
                                 => ~ ! [X3: $i] :
                                        ( ( in @ X3 @ X1 )
                                       => ( X2 @ X3 ) ) )
                             => ( ! [X1: $o] :
                                    ( X1
                                   => ( in @ emptyset @ ( prop2set @ X1 ) ) )
                               => ( ! [X1: $o] :
                                      ( X1
                                     => ( set2prop @ ( prop2set @ X1 ) ) )
                                 => ( ! [X1: $i,X2: $i > $o] :
                                        ( ! [X3: $i] :
                                            ( ( in @ X3 @ X1 )
                                           => ~ ( X2 @ X3 ) )
                                       => ! [X3: $i] :
                                            ( ( in @ X3 @ X1 )
                                           => ~ ( X2 @ X3 ) ) )
                                   => ( ! [X1: $i,X2: $i > $o] :
                                          ( ~ ! [X3: $i] :
                                                ( ( in @ X3 @ X1 )
                                               => ( X2 @ X3 ) )
                                         => ~ ! [X3: $i] :
                                                ( ( in @ X3 @ X1 )
                                               => ( X2 @ X3 ) ) )
                                     => ( ! [X1: $i > $o] :
                                            ( ~ ! [X2: $i] :
                                                  ( ( X1 @ X2 )
                                                 => ~ ! [X3: $i] :
                                                        ( ( X1 @ X3 )
                                                       => ( X2 = X3 ) ) )
                                           => ~ ! [X2: $i] :
                                                  ( ( X1 @ X2 )
                                                 => ~ ! [X3: $i] :
                                                        ( ( X1 @ X3 )
                                                       => ( X2 = X3 ) ) ) )
                                       => ( ! [X1: $i > $o] :
                                              ( ~ ! [X2: $i] :
                                                    ~ ( X1 @ X2 )
                                             => ( ! [X2: $i,X3: $i] :
                                                    ( ( X1 @ X2 )
                                                   => ( ( X1 @ X3 )
                                                     => ( X2 = X3 ) ) )
                                               => ~ ! [X2: $i] :
                                                      ( ( X1 @ X2 )
                                                     => ~ ! [X3: $i] :
                                                            ( ( X1 @ X3 )
                                                           => ( X2 = X3 ) ) ) ) )
                                         => ! [X1: $i > $o] :
                                              ( ~ ! [X2: $i] :
                                                    ~ ! [X3: $i] :
                                                        ( ( X1 @ X3 )
                                                        = ( X3 = X2 ) )
                                             => ~ ! [X2: $i] :
                                                    ( ( X1 @ X2 )
                                                   => ~ ! [X3: $i] :
                                                          ( ( X1 @ X3 )
                                                         => ( X2 = X3 ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ),
    introduced(assumption,[]) ).

thf(h83,assumption,
    ! [X1: $i,X2: $i] :
      ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
     => ( X1 = X2 ) ),
    introduced(assumption,[]) ).

thf(h84,assumption,
    ~ ( ! [X1: $i,X2: $i] :
          ( ( X1 != X2 )
         => ~ ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
     => ( ! [X1: $i,X2: $i] :
            ( ( X1 = X2 )
           => ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
       => ( ! [X1: $i,X2: $i] :
              ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
             => ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
         => ( ! [X1: $i,X2: $i,X3: $i] :
                ( ( in @ X3 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
               => ( ( X3 != X1 )
                 => ( X3 = X2 ) ) )
           => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
             => ( ! [X1: $i,X2: $i] : ( in @ X2 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
               => ( ! [X1: $i,X2: $i > $o] :
                      ( ~ ! [X3: $i] :
                            ( ( in @ X3 @ X1 )
                           => ~ ( X2 @ X3 ) )
                     => ( ( dsetconstr @ X1 @ X2 )
                       != emptyset ) )
                 => ( ! [X1: $i > $o,X2: $i] :
                        ( ( in @ X2 @ emptyset )
                       => ( X1 @ X2 ) )
                   => ( ! [X1: $i,X2: $i > $o] :
                          ( ~ ! [X3: $i] :
                                ( ( in @ X3 @ X1 )
                               => ( X2 @ X3 ) )
                         => ~ ! [X3: $i] :
                                ( ( in @ X3 @ X1 )
                               => ( X2 @ X3 ) ) )
                     => ( ! [X1: $i,X2: $i > $o] :
                            ( ! [X3: $i] :
                                ( ( in @ X3 @ X1 )
                               => ~ ( X2 @ X3 ) )
                           => ! [X3: $i] :
                                ( ( in @ X3 @ X1 )
                               => ~ ( X2 @ X3 ) ) )
                       => ( ! [X1: $i,X2: $i > $o] :
                              ( ! [X3: $i] :
                                  ( ( in @ X3 @ X1 )
                                 => ~ ( X2 @ X3 ) )
                             => ! [X3: $i] :
                                  ( ( in @ X3 @ X1 )
                                 => ~ ( X2 @ X3 ) ) )
                         => ( ! [X1: $i,X2: $i > $o] :
                                ( ~ ! [X3: $i] :
                                      ( ( in @ X3 @ X1 )
                                     => ( X2 @ X3 ) )
                               => ~ ! [X3: $i] :
                                      ( ( in @ X3 @ X1 )
                                     => ( X2 @ X3 ) ) )
                           => ( ! [X1: $o] :
                                  ( X1
                                 => ( in @ emptyset @ ( prop2set @ X1 ) ) )
                             => ( ! [X1: $o] :
                                    ( X1
                                   => ( set2prop @ ( prop2set @ X1 ) ) )
                               => ( ! [X1: $i,X2: $i > $o] :
                                      ( ! [X3: $i] :
                                          ( ( in @ X3 @ X1 )
                                         => ~ ( X2 @ X3 ) )
                                     => ! [X3: $i] :
                                          ( ( in @ X3 @ X1 )
                                         => ~ ( X2 @ X3 ) ) )
                                 => ( ! [X1: $i,X2: $i > $o] :
                                        ( ~ ! [X3: $i] :
                                              ( ( in @ X3 @ X1 )
                                             => ( X2 @ X3 ) )
                                       => ~ ! [X3: $i] :
                                              ( ( in @ X3 @ X1 )
                                             => ( X2 @ X3 ) ) )
                                   => ( ! [X1: $i > $o] :
                                          ( ~ ! [X2: $i] :
                                                ( ( X1 @ X2 )
                                               => ~ ! [X3: $i] :
                                                      ( ( X1 @ X3 )
                                                     => ( X2 = X3 ) ) )
                                         => ~ ! [X2: $i] :
                                                ( ( X1 @ X2 )
                                               => ~ ! [X3: $i] :
                                                      ( ( X1 @ X3 )
                                                     => ( X2 = X3 ) ) ) )
                                     => ( ! [X1: $i > $o] :
                                            ( ~ ! [X2: $i] :
                                                  ~ ( X1 @ X2 )
                                           => ( ! [X2: $i,X3: $i] :
                                                  ( ( X1 @ X2 )
                                                 => ( ( X1 @ X3 )
                                                   => ( X2 = X3 ) ) )
                                             => ~ ! [X2: $i] :
                                                    ( ( X1 @ X2 )
                                                   => ~ ! [X3: $i] :
                                                          ( ( X1 @ X3 )
                                                         => ( X2 = X3 ) ) ) ) )
                                       => ! [X1: $i > $o] :
                                            ( ~ ! [X2: $i] :
                                                  ~ ! [X3: $i] :
                                                      ( ( X1 @ X3 )
                                                      = ( X3 = X2 ) )
                                           => ~ ! [X2: $i] :
                                                  ( ( X1 @ X2 )
                                                 => ~ ! [X3: $i] :
                                                        ( ( X1 @ X3 )
                                                       => ( X2 = X3 ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ),
    introduced(assumption,[]) ).

thf(h85,assumption,
    ! [X1: $i,X2: $i] :
      ( ( X1 != X2 )
     => ~ ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) ),
    introduced(assumption,[]) ).

thf(h86,assumption,
    ~ ( ! [X1: $i,X2: $i] :
          ( ( X1 = X2 )
         => ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
     => ( ! [X1: $i,X2: $i] :
            ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
           => ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
       => ( ! [X1: $i,X2: $i,X3: $i] :
              ( ( in @ X3 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
             => ( ( X3 != X1 )
               => ( X3 = X2 ) ) )
         => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
           => ( ! [X1: $i,X2: $i] : ( in @ X2 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
             => ( ! [X1: $i,X2: $i > $o] :
                    ( ~ ! [X3: $i] :
                          ( ( in @ X3 @ X1 )
                         => ~ ( X2 @ X3 ) )
                   => ( ( dsetconstr @ X1 @ X2 )
                     != emptyset ) )
               => ( ! [X1: $i > $o,X2: $i] :
                      ( ( in @ X2 @ emptyset )
                     => ( X1 @ X2 ) )
                 => ( ! [X1: $i,X2: $i > $o] :
                        ( ~ ! [X3: $i] :
                              ( ( in @ X3 @ X1 )
                             => ( X2 @ X3 ) )
                       => ~ ! [X3: $i] :
                              ( ( in @ X3 @ X1 )
                             => ( X2 @ X3 ) ) )
                   => ( ! [X1: $i,X2: $i > $o] :
                          ( ! [X3: $i] :
                              ( ( in @ X3 @ X1 )
                             => ~ ( X2 @ X3 ) )
                         => ! [X3: $i] :
                              ( ( in @ X3 @ X1 )
                             => ~ ( X2 @ X3 ) ) )
                     => ( ! [X1: $i,X2: $i > $o] :
                            ( ! [X3: $i] :
                                ( ( in @ X3 @ X1 )
                               => ~ ( X2 @ X3 ) )
                           => ! [X3: $i] :
                                ( ( in @ X3 @ X1 )
                               => ~ ( X2 @ X3 ) ) )
                       => ( ! [X1: $i,X2: $i > $o] :
                              ( ~ ! [X3: $i] :
                                    ( ( in @ X3 @ X1 )
                                   => ( X2 @ X3 ) )
                             => ~ ! [X3: $i] :
                                    ( ( in @ X3 @ X1 )
                                   => ( X2 @ X3 ) ) )
                         => ( ! [X1: $o] :
                                ( X1
                               => ( in @ emptyset @ ( prop2set @ X1 ) ) )
                           => ( ! [X1: $o] :
                                  ( X1
                                 => ( set2prop @ ( prop2set @ X1 ) ) )
                             => ( ! [X1: $i,X2: $i > $o] :
                                    ( ! [X3: $i] :
                                        ( ( in @ X3 @ X1 )
                                       => ~ ( X2 @ X3 ) )
                                   => ! [X3: $i] :
                                        ( ( in @ X3 @ X1 )
                                       => ~ ( X2 @ X3 ) ) )
                               => ( ! [X1: $i,X2: $i > $o] :
                                      ( ~ ! [X3: $i] :
                                            ( ( in @ X3 @ X1 )
                                           => ( X2 @ X3 ) )
                                     => ~ ! [X3: $i] :
                                            ( ( in @ X3 @ X1 )
                                           => ( X2 @ X3 ) ) )
                                 => ( ! [X1: $i > $o] :
                                        ( ~ ! [X2: $i] :
                                              ( ( X1 @ X2 )
                                             => ~ ! [X3: $i] :
                                                    ( ( X1 @ X3 )
                                                   => ( X2 = X3 ) ) )
                                       => ~ ! [X2: $i] :
                                              ( ( X1 @ X2 )
                                             => ~ ! [X3: $i] :
                                                    ( ( X1 @ X3 )
                                                   => ( X2 = X3 ) ) ) )
                                   => ( ! [X1: $i > $o] :
                                          ( ~ ! [X2: $i] :
                                                ~ ( X1 @ X2 )
                                         => ( ! [X2: $i,X3: $i] :
                                                ( ( X1 @ X2 )
                                               => ( ( X1 @ X3 )
                                                 => ( X2 = X3 ) ) )
                                           => ~ ! [X2: $i] :
                                                  ( ( X1 @ X2 )
                                                 => ~ ! [X3: $i] :
                                                        ( ( X1 @ X3 )
                                                       => ( X2 = X3 ) ) ) ) )
                                     => ! [X1: $i > $o] :
                                          ( ~ ! [X2: $i] :
                                                ~ ! [X3: $i] :
                                                    ( ( X1 @ X3 )
                                                    = ( X3 = X2 ) )
                                         => ~ ! [X2: $i] :
                                                ( ( X1 @ X2 )
                                               => ~ ! [X3: $i] :
                                                      ( ( X1 @ X3 )
                                                     => ( X2 = X3 ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ),
    introduced(assumption,[]) ).

thf(h87,assumption,
    ! [X1: $i,X2: $i] :
      ( ( X1 = X2 )
     => ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) ) ),
    introduced(assumption,[]) ).

thf(h88,assumption,
    ~ ( ! [X1: $i,X2: $i] :
          ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
         => ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
     => ( ! [X1: $i,X2: $i,X3: $i] :
            ( ( in @ X3 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
           => ( ( X3 != X1 )
             => ( X3 = X2 ) ) )
       => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
         => ( ! [X1: $i,X2: $i] : ( in @ X2 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
           => ( ! [X1: $i,X2: $i > $o] :
                  ( ~ ! [X3: $i] :
                        ( ( in @ X3 @ X1 )
                       => ~ ( X2 @ X3 ) )
                 => ( ( dsetconstr @ X1 @ X2 )
                   != emptyset ) )
             => ( ! [X1: $i > $o,X2: $i] :
                    ( ( in @ X2 @ emptyset )
                   => ( X1 @ X2 ) )
               => ( ! [X1: $i,X2: $i > $o] :
                      ( ~ ! [X3: $i] :
                            ( ( in @ X3 @ X1 )
                           => ( X2 @ X3 ) )
                     => ~ ! [X3: $i] :
                            ( ( in @ X3 @ X1 )
                           => ( X2 @ X3 ) ) )
                 => ( ! [X1: $i,X2: $i > $o] :
                        ( ! [X3: $i] :
                            ( ( in @ X3 @ X1 )
                           => ~ ( X2 @ X3 ) )
                       => ! [X3: $i] :
                            ( ( in @ X3 @ X1 )
                           => ~ ( X2 @ X3 ) ) )
                   => ( ! [X1: $i,X2: $i > $o] :
                          ( ! [X3: $i] :
                              ( ( in @ X3 @ X1 )
                             => ~ ( X2 @ X3 ) )
                         => ! [X3: $i] :
                              ( ( in @ X3 @ X1 )
                             => ~ ( X2 @ X3 ) ) )
                     => ( ! [X1: $i,X2: $i > $o] :
                            ( ~ ! [X3: $i] :
                                  ( ( in @ X3 @ X1 )
                                 => ( X2 @ X3 ) )
                           => ~ ! [X3: $i] :
                                  ( ( in @ X3 @ X1 )
                                 => ( X2 @ X3 ) ) )
                       => ( ! [X1: $o] :
                              ( X1
                             => ( in @ emptyset @ ( prop2set @ X1 ) ) )
                         => ( ! [X1: $o] :
                                ( X1
                               => ( set2prop @ ( prop2set @ X1 ) ) )
                           => ( ! [X1: $i,X2: $i > $o] :
                                  ( ! [X3: $i] :
                                      ( ( in @ X3 @ X1 )
                                     => ~ ( X2 @ X3 ) )
                                 => ! [X3: $i] :
                                      ( ( in @ X3 @ X1 )
                                     => ~ ( X2 @ X3 ) ) )
                             => ( ! [X1: $i,X2: $i > $o] :
                                    ( ~ ! [X3: $i] :
                                          ( ( in @ X3 @ X1 )
                                         => ( X2 @ X3 ) )
                                   => ~ ! [X3: $i] :
                                          ( ( in @ X3 @ X1 )
                                         => ( X2 @ X3 ) ) )
                               => ( ! [X1: $i > $o] :
                                      ( ~ ! [X2: $i] :
                                            ( ( X1 @ X2 )
                                           => ~ ! [X3: $i] :
                                                  ( ( X1 @ X3 )
                                                 => ( X2 = X3 ) ) )
                                     => ~ ! [X2: $i] :
                                            ( ( X1 @ X2 )
                                           => ~ ! [X3: $i] :
                                                  ( ( X1 @ X3 )
                                                 => ( X2 = X3 ) ) ) )
                                 => ( ! [X1: $i > $o] :
                                        ( ~ ! [X2: $i] :
                                              ~ ( X1 @ X2 )
                                       => ( ! [X2: $i,X3: $i] :
                                              ( ( X1 @ X2 )
                                             => ( ( X1 @ X3 )
                                               => ( X2 = X3 ) ) )
                                         => ~ ! [X2: $i] :
                                                ( ( X1 @ X2 )
                                               => ~ ! [X3: $i] :
                                                      ( ( X1 @ X3 )
                                                     => ( X2 = X3 ) ) ) ) )
                                   => ! [X1: $i > $o] :
                                        ( ~ ! [X2: $i] :
                                              ~ ! [X3: $i] :
                                                  ( ( X1 @ X3 )
                                                  = ( X3 = X2 ) )
                                       => ~ ! [X2: $i] :
                                              ( ( X1 @ X2 )
                                             => ~ ! [X3: $i] :
                                                    ( ( X1 @ X3 )
                                                   => ( X2 = X3 ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ),
    introduced(assumption,[]) ).

thf(h89,assumption,
    ! [X1: $i,X2: $i] :
      ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
     => ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) ),
    introduced(assumption,[]) ).

thf(h90,assumption,
    ~ ( ! [X1: $i,X2: $i,X3: $i] :
          ( ( in @ X3 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
         => ( ( X3 != X1 )
           => ( X3 = X2 ) ) )
     => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
       => ( ! [X1: $i,X2: $i] : ( in @ X2 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
         => ( ! [X1: $i,X2: $i > $o] :
                ( ~ ! [X3: $i] :
                      ( ( in @ X3 @ X1 )
                     => ~ ( X2 @ X3 ) )
               => ( ( dsetconstr @ X1 @ X2 )
                 != emptyset ) )
           => ( ! [X1: $i > $o,X2: $i] :
                  ( ( in @ X2 @ emptyset )
                 => ( X1 @ X2 ) )
             => ( ! [X1: $i,X2: $i > $o] :
                    ( ~ ! [X3: $i] :
                          ( ( in @ X3 @ X1 )
                         => ( X2 @ X3 ) )
                   => ~ ! [X3: $i] :
                          ( ( in @ X3 @ X1 )
                         => ( X2 @ X3 ) ) )
               => ( ! [X1: $i,X2: $i > $o] :
                      ( ! [X3: $i] :
                          ( ( in @ X3 @ X1 )
                         => ~ ( X2 @ X3 ) )
                     => ! [X3: $i] :
                          ( ( in @ X3 @ X1 )
                         => ~ ( X2 @ X3 ) ) )
                 => ( ! [X1: $i,X2: $i > $o] :
                        ( ! [X3: $i] :
                            ( ( in @ X3 @ X1 )
                           => ~ ( X2 @ X3 ) )
                       => ! [X3: $i] :
                            ( ( in @ X3 @ X1 )
                           => ~ ( X2 @ X3 ) ) )
                   => ( ! [X1: $i,X2: $i > $o] :
                          ( ~ ! [X3: $i] :
                                ( ( in @ X3 @ X1 )
                               => ( X2 @ X3 ) )
                         => ~ ! [X3: $i] :
                                ( ( in @ X3 @ X1 )
                               => ( X2 @ X3 ) ) )
                     => ( ! [X1: $o] :
                            ( X1
                           => ( in @ emptyset @ ( prop2set @ X1 ) ) )
                       => ( ! [X1: $o] :
                              ( X1
                             => ( set2prop @ ( prop2set @ X1 ) ) )
                         => ( ! [X1: $i,X2: $i > $o] :
                                ( ! [X3: $i] :
                                    ( ( in @ X3 @ X1 )
                                   => ~ ( X2 @ X3 ) )
                               => ! [X3: $i] :
                                    ( ( in @ X3 @ X1 )
                                   => ~ ( X2 @ X3 ) ) )
                           => ( ! [X1: $i,X2: $i > $o] :
                                  ( ~ ! [X3: $i] :
                                        ( ( in @ X3 @ X1 )
                                       => ( X2 @ X3 ) )
                                 => ~ ! [X3: $i] :
                                        ( ( in @ X3 @ X1 )
                                       => ( X2 @ X3 ) ) )
                             => ( ! [X1: $i > $o] :
                                    ( ~ ! [X2: $i] :
                                          ( ( X1 @ X2 )
                                         => ~ ! [X3: $i] :
                                                ( ( X1 @ X3 )
                                               => ( X2 = X3 ) ) )
                                   => ~ ! [X2: $i] :
                                          ( ( X1 @ X2 )
                                         => ~ ! [X3: $i] :
                                                ( ( X1 @ X3 )
                                               => ( X2 = X3 ) ) ) )
                               => ( ! [X1: $i > $o] :
                                      ( ~ ! [X2: $i] :
                                            ~ ( X1 @ X2 )
                                     => ( ! [X2: $i,X3: $i] :
                                            ( ( X1 @ X2 )
                                           => ( ( X1 @ X3 )
                                             => ( X2 = X3 ) ) )
                                       => ~ ! [X2: $i] :
                                              ( ( X1 @ X2 )
                                             => ~ ! [X3: $i] :
                                                    ( ( X1 @ X3 )
                                                   => ( X2 = X3 ) ) ) ) )
                                 => ! [X1: $i > $o] :
                                      ( ~ ! [X2: $i] :
                                            ~ ! [X3: $i] :
                                                ( ( X1 @ X3 )
                                                = ( X3 = X2 ) )
                                     => ~ ! [X2: $i] :
                                            ( ( X1 @ X2 )
                                           => ~ ! [X3: $i] :
                                                  ( ( X1 @ X3 )
                                                 => ( X2 = X3 ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ),
    introduced(assumption,[]) ).

thf(h91,assumption,
    ! [X1: $i,X2: $i,X3: $i] :
      ( ( in @ X3 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
     => ( ( X3 != X1 )
       => ( X3 = X2 ) ) ),
    introduced(assumption,[]) ).

thf(h92,assumption,
    ~ ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
     => ( ! [X1: $i,X2: $i] : ( in @ X2 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
       => ( ! [X1: $i,X2: $i > $o] :
              ( ~ ! [X3: $i] :
                    ( ( in @ X3 @ X1 )
                   => ~ ( X2 @ X3 ) )
             => ( ( dsetconstr @ X1 @ X2 )
               != emptyset ) )
         => ( ! [X1: $i > $o,X2: $i] :
                ( ( in @ X2 @ emptyset )
               => ( X1 @ X2 ) )
           => ( ! [X1: $i,X2: $i > $o] :
                  ( ~ ! [X3: $i] :
                        ( ( in @ X3 @ X1 )
                       => ( X2 @ X3 ) )
                 => ~ ! [X3: $i] :
                        ( ( in @ X3 @ X1 )
                       => ( X2 @ X3 ) ) )
             => ( ! [X1: $i,X2: $i > $o] :
                    ( ! [X3: $i] :
                        ( ( in @ X3 @ X1 )
                       => ~ ( X2 @ X3 ) )
                   => ! [X3: $i] :
                        ( ( in @ X3 @ X1 )
                       => ~ ( X2 @ X3 ) ) )
               => ( ! [X1: $i,X2: $i > $o] :
                      ( ! [X3: $i] :
                          ( ( in @ X3 @ X1 )
                         => ~ ( X2 @ X3 ) )
                     => ! [X3: $i] :
                          ( ( in @ X3 @ X1 )
                         => ~ ( X2 @ X3 ) ) )
                 => ( ! [X1: $i,X2: $i > $o] :
                        ( ~ ! [X3: $i] :
                              ( ( in @ X3 @ X1 )
                             => ( X2 @ X3 ) )
                       => ~ ! [X3: $i] :
                              ( ( in @ X3 @ X1 )
                             => ( X2 @ X3 ) ) )
                   => ( ! [X1: $o] :
                          ( X1
                         => ( in @ emptyset @ ( prop2set @ X1 ) ) )
                     => ( ! [X1: $o] :
                            ( X1
                           => ( set2prop @ ( prop2set @ X1 ) ) )
                       => ( ! [X1: $i,X2: $i > $o] :
                              ( ! [X3: $i] :
                                  ( ( in @ X3 @ X1 )
                                 => ~ ( X2 @ X3 ) )
                             => ! [X3: $i] :
                                  ( ( in @ X3 @ X1 )
                                 => ~ ( X2 @ X3 ) ) )
                         => ( ! [X1: $i,X2: $i > $o] :
                                ( ~ ! [X3: $i] :
                                      ( ( in @ X3 @ X1 )
                                     => ( X2 @ X3 ) )
                               => ~ ! [X3: $i] :
                                      ( ( in @ X3 @ X1 )
                                     => ( X2 @ X3 ) ) )
                           => ( ! [X1: $i > $o] :
                                  ( ~ ! [X2: $i] :
                                        ( ( X1 @ X2 )
                                       => ~ ! [X3: $i] :
                                              ( ( X1 @ X3 )
                                             => ( X2 = X3 ) ) )
                                 => ~ ! [X2: $i] :
                                        ( ( X1 @ X2 )
                                       => ~ ! [X3: $i] :
                                              ( ( X1 @ X3 )
                                             => ( X2 = X3 ) ) ) )
                             => ( ! [X1: $i > $o] :
                                    ( ~ ! [X2: $i] :
                                          ~ ( X1 @ X2 )
                                   => ( ! [X2: $i,X3: $i] :
                                          ( ( X1 @ X2 )
                                         => ( ( X1 @ X3 )
                                           => ( X2 = X3 ) ) )
                                     => ~ ! [X2: $i] :
                                            ( ( X1 @ X2 )
                                           => ~ ! [X3: $i] :
                                                  ( ( X1 @ X3 )
                                                 => ( X2 = X3 ) ) ) ) )
                               => ! [X1: $i > $o] :
                                    ( ~ ! [X2: $i] :
                                          ~ ! [X3: $i] :
                                              ( ( X1 @ X3 )
                                              = ( X3 = X2 ) )
                                   => ~ ! [X2: $i] :
                                          ( ( X1 @ X2 )
                                         => ~ ! [X3: $i] :
                                                ( ( X1 @ X3 )
                                               => ( X2 = X3 ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ),
    introduced(assumption,[]) ).

thf(h93,assumption,
    ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) ),
    introduced(assumption,[]) ).

thf(h94,assumption,
    ~ ( ! [X1: $i,X2: $i] : ( in @ X2 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
     => ( ! [X1: $i,X2: $i > $o] :
            ( ~ ! [X3: $i] :
                  ( ( in @ X3 @ X1 )
                 => ~ ( X2 @ X3 ) )
           => ( ( dsetconstr @ X1 @ X2 )
             != emptyset ) )
       => ( ! [X1: $i > $o,X2: $i] :
              ( ( in @ X2 @ emptyset )
             => ( X1 @ X2 ) )
         => ( ! [X1: $i,X2: $i > $o] :
                ( ~ ! [X3: $i] :
                      ( ( in @ X3 @ X1 )
                     => ( X2 @ X3 ) )
               => ~ ! [X3: $i] :
                      ( ( in @ X3 @ X1 )
                     => ( X2 @ X3 ) ) )
           => ( ! [X1: $i,X2: $i > $o] :
                  ( ! [X3: $i] :
                      ( ( in @ X3 @ X1 )
                     => ~ ( X2 @ X3 ) )
                 => ! [X3: $i] :
                      ( ( in @ X3 @ X1 )
                     => ~ ( X2 @ X3 ) ) )
             => ( ! [X1: $i,X2: $i > $o] :
                    ( ! [X3: $i] :
                        ( ( in @ X3 @ X1 )
                       => ~ ( X2 @ X3 ) )
                   => ! [X3: $i] :
                        ( ( in @ X3 @ X1 )
                       => ~ ( X2 @ X3 ) ) )
               => ( ! [X1: $i,X2: $i > $o] :
                      ( ~ ! [X3: $i] :
                            ( ( in @ X3 @ X1 )
                           => ( X2 @ X3 ) )
                     => ~ ! [X3: $i] :
                            ( ( in @ X3 @ X1 )
                           => ( X2 @ X3 ) ) )
                 => ( ! [X1: $o] :
                        ( X1
                       => ( in @ emptyset @ ( prop2set @ X1 ) ) )
                   => ( ! [X1: $o] :
                          ( X1
                         => ( set2prop @ ( prop2set @ X1 ) ) )
                     => ( ! [X1: $i,X2: $i > $o] :
                            ( ! [X3: $i] :
                                ( ( in @ X3 @ X1 )
                               => ~ ( X2 @ X3 ) )
                           => ! [X3: $i] :
                                ( ( in @ X3 @ X1 )
                               => ~ ( X2 @ X3 ) ) )
                       => ( ! [X1: $i,X2: $i > $o] :
                              ( ~ ! [X3: $i] :
                                    ( ( in @ X3 @ X1 )
                                   => ( X2 @ X3 ) )
                             => ~ ! [X3: $i] :
                                    ( ( in @ X3 @ X1 )
                                   => ( X2 @ X3 ) ) )
                         => ( ! [X1: $i > $o] :
                                ( ~ ! [X2: $i] :
                                      ( ( X1 @ X2 )
                                     => ~ ! [X3: $i] :
                                            ( ( X1 @ X3 )
                                           => ( X2 = X3 ) ) )
                               => ~ ! [X2: $i] :
                                      ( ( X1 @ X2 )
                                     => ~ ! [X3: $i] :
                                            ( ( X1 @ X3 )
                                           => ( X2 = X3 ) ) ) )
                           => ( ! [X1: $i > $o] :
                                  ( ~ ! [X2: $i] :
                                        ~ ( X1 @ X2 )
                                 => ( ! [X2: $i,X3: $i] :
                                        ( ( X1 @ X2 )
                                       => ( ( X1 @ X3 )
                                         => ( X2 = X3 ) ) )
                                   => ~ ! [X2: $i] :
                                          ( ( X1 @ X2 )
                                         => ~ ! [X3: $i] :
                                                ( ( X1 @ X3 )
                                               => ( X2 = X3 ) ) ) ) )
                             => ! [X1: $i > $o] :
                                  ( ~ ! [X2: $i] :
                                        ~ ! [X3: $i] :
                                            ( ( X1 @ X3 )
                                            = ( X3 = X2 ) )
                                 => ~ ! [X2: $i] :
                                        ( ( X1 @ X2 )
                                       => ~ ! [X3: $i] :
                                              ( ( X1 @ X3 )
                                             => ( X2 = X3 ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ),
    introduced(assumption,[]) ).

thf(h95,assumption,
    ! [X1: $i,X2: $i] : ( in @ X2 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) ),
    introduced(assumption,[]) ).

thf(h96,assumption,
    ~ ( ! [X1: $i,X2: $i > $o] :
          ( ~ ! [X3: $i] :
                ( ( in @ X3 @ X1 )
               => ~ ( X2 @ X3 ) )
         => ( ( dsetconstr @ X1 @ X2 )
           != emptyset ) )
     => ( ! [X1: $i > $o,X2: $i] :
            ( ( in @ X2 @ emptyset )
           => ( X1 @ X2 ) )
       => ( ! [X1: $i,X2: $i > $o] :
              ( ~ ! [X3: $i] :
                    ( ( in @ X3 @ X1 )
                   => ( X2 @ X3 ) )
             => ~ ! [X3: $i] :
                    ( ( in @ X3 @ X1 )
                   => ( X2 @ X3 ) ) )
         => ( ! [X1: $i,X2: $i > $o] :
                ( ! [X3: $i] :
                    ( ( in @ X3 @ X1 )
                   => ~ ( X2 @ X3 ) )
               => ! [X3: $i] :
                    ( ( in @ X3 @ X1 )
                   => ~ ( X2 @ X3 ) ) )
           => ( ! [X1: $i,X2: $i > $o] :
                  ( ! [X3: $i] :
                      ( ( in @ X3 @ X1 )
                     => ~ ( X2 @ X3 ) )
                 => ! [X3: $i] :
                      ( ( in @ X3 @ X1 )
                     => ~ ( X2 @ X3 ) ) )
             => ( ! [X1: $i,X2: $i > $o] :
                    ( ~ ! [X3: $i] :
                          ( ( in @ X3 @ X1 )
                         => ( X2 @ X3 ) )
                   => ~ ! [X3: $i] :
                          ( ( in @ X3 @ X1 )
                         => ( X2 @ X3 ) ) )
               => ( ! [X1: $o] :
                      ( X1
                     => ( in @ emptyset @ ( prop2set @ X1 ) ) )
                 => ( ! [X1: $o] :
                        ( X1
                       => ( set2prop @ ( prop2set @ X1 ) ) )
                   => ( ! [X1: $i,X2: $i > $o] :
                          ( ! [X3: $i] :
                              ( ( in @ X3 @ X1 )
                             => ~ ( X2 @ X3 ) )
                         => ! [X3: $i] :
                              ( ( in @ X3 @ X1 )
                             => ~ ( X2 @ X3 ) ) )
                     => ( ! [X1: $i,X2: $i > $o] :
                            ( ~ ! [X3: $i] :
                                  ( ( in @ X3 @ X1 )
                                 => ( X2 @ X3 ) )
                           => ~ ! [X3: $i] :
                                  ( ( in @ X3 @ X1 )
                                 => ( X2 @ X3 ) ) )
                       => ( ! [X1: $i > $o] :
                              ( ~ ! [X2: $i] :
                                    ( ( X1 @ X2 )
                                   => ~ ! [X3: $i] :
                                          ( ( X1 @ X3 )
                                         => ( X2 = X3 ) ) )
                             => ~ ! [X2: $i] :
                                    ( ( X1 @ X2 )
                                   => ~ ! [X3: $i] :
                                          ( ( X1 @ X3 )
                                         => ( X2 = X3 ) ) ) )
                         => ( ! [X1: $i > $o] :
                                ( ~ ! [X2: $i] :
                                      ~ ( X1 @ X2 )
                               => ( ! [X2: $i,X3: $i] :
                                      ( ( X1 @ X2 )
                                     => ( ( X1 @ X3 )
                                       => ( X2 = X3 ) ) )
                                 => ~ ! [X2: $i] :
                                        ( ( X1 @ X2 )
                                       => ~ ! [X3: $i] :
                                              ( ( X1 @ X3 )
                                             => ( X2 = X3 ) ) ) ) )
                           => ! [X1: $i > $o] :
                                ( ~ ! [X2: $i] :
                                      ~ ! [X3: $i] :
                                          ( ( X1 @ X3 )
                                          = ( X3 = X2 ) )
                               => ~ ! [X2: $i] :
                                      ( ( X1 @ X2 )
                                     => ~ ! [X3: $i] :
                                            ( ( X1 @ X3 )
                                           => ( X2 = X3 ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ),
    introduced(assumption,[]) ).

thf(h97,assumption,
    ! [X1: $i,X2: $i > $o] :
      ( ~ ! [X3: $i] :
            ( ( in @ X3 @ X1 )
           => ~ ( X2 @ X3 ) )
     => ( ( dsetconstr @ X1 @ X2 )
       != emptyset ) ),
    introduced(assumption,[]) ).

thf(h98,assumption,
    ~ ( ! [X1: $i > $o,X2: $i] :
          ( ( in @ X2 @ emptyset )
         => ( X1 @ X2 ) )
     => ( ! [X1: $i,X2: $i > $o] :
            ( ~ ! [X3: $i] :
                  ( ( in @ X3 @ X1 )
                 => ( X2 @ X3 ) )
           => ~ ! [X3: $i] :
                  ( ( in @ X3 @ X1 )
                 => ( X2 @ X3 ) ) )
       => ( ! [X1: $i,X2: $i > $o] :
              ( ! [X3: $i] :
                  ( ( in @ X3 @ X1 )
                 => ~ ( X2 @ X3 ) )
             => ! [X3: $i] :
                  ( ( in @ X3 @ X1 )
                 => ~ ( X2 @ X3 ) ) )
         => ( ! [X1: $i,X2: $i > $o] :
                ( ! [X3: $i] :
                    ( ( in @ X3 @ X1 )
                   => ~ ( X2 @ X3 ) )
               => ! [X3: $i] :
                    ( ( in @ X3 @ X1 )
                   => ~ ( X2 @ X3 ) ) )
           => ( ! [X1: $i,X2: $i > $o] :
                  ( ~ ! [X3: $i] :
                        ( ( in @ X3 @ X1 )
                       => ( X2 @ X3 ) )
                 => ~ ! [X3: $i] :
                        ( ( in @ X3 @ X1 )
                       => ( X2 @ X3 ) ) )
             => ( ! [X1: $o] :
                    ( X1
                   => ( in @ emptyset @ ( prop2set @ X1 ) ) )
               => ( ! [X1: $o] :
                      ( X1
                     => ( set2prop @ ( prop2set @ X1 ) ) )
                 => ( ! [X1: $i,X2: $i > $o] :
                        ( ! [X3: $i] :
                            ( ( in @ X3 @ X1 )
                           => ~ ( X2 @ X3 ) )
                       => ! [X3: $i] :
                            ( ( in @ X3 @ X1 )
                           => ~ ( X2 @ X3 ) ) )
                   => ( ! [X1: $i,X2: $i > $o] :
                          ( ~ ! [X3: $i] :
                                ( ( in @ X3 @ X1 )
                               => ( X2 @ X3 ) )
                         => ~ ! [X3: $i] :
                                ( ( in @ X3 @ X1 )
                               => ( X2 @ X3 ) ) )
                     => ( ! [X1: $i > $o] :
                            ( ~ ! [X2: $i] :
                                  ( ( X1 @ X2 )
                                 => ~ ! [X3: $i] :
                                        ( ( X1 @ X3 )
                                       => ( X2 = X3 ) ) )
                           => ~ ! [X2: $i] :
                                  ( ( X1 @ X2 )
                                 => ~ ! [X3: $i] :
                                        ( ( X1 @ X3 )
                                       => ( X2 = X3 ) ) ) )
                       => ( ! [X1: $i > $o] :
                              ( ~ ! [X2: $i] :
                                    ~ ( X1 @ X2 )
                             => ( ! [X2: $i,X3: $i] :
                                    ( ( X1 @ X2 )
                                   => ( ( X1 @ X3 )
                                     => ( X2 = X3 ) ) )
                               => ~ ! [X2: $i] :
                                      ( ( X1 @ X2 )
                                     => ~ ! [X3: $i] :
                                            ( ( X1 @ X3 )
                                           => ( X2 = X3 ) ) ) ) )
                         => ! [X1: $i > $o] :
                              ( ~ ! [X2: $i] :
                                    ~ ! [X3: $i] :
                                        ( ( X1 @ X3 )
                                        = ( X3 = X2 ) )
                             => ~ ! [X2: $i] :
                                    ( ( X1 @ X2 )
                                   => ~ ! [X3: $i] :
                                          ( ( X1 @ X3 )
                                         => ( X2 = X3 ) ) ) ) ) ) ) ) ) ) ) ) ) ) ),
    introduced(assumption,[]) ).

thf(h99,assumption,
    ! [X1: $i > $o,X2: $i] :
      ( ( in @ X2 @ emptyset )
     => ( X1 @ X2 ) ),
    introduced(assumption,[]) ).

thf(h100,assumption,
    ~ ( ! [X1: $i,X2: $i > $o] :
          ( ~ ! [X3: $i] :
                ( ( in @ X3 @ X1 )
               => ( X2 @ X3 ) )
         => ~ ! [X3: $i] :
                ( ( in @ X3 @ X1 )
               => ( X2 @ X3 ) ) )
     => ( ! [X1: $i,X2: $i > $o] :
            ( ! [X3: $i] :
                ( ( in @ X3 @ X1 )
               => ~ ( X2 @ X3 ) )
           => ! [X3: $i] :
                ( ( in @ X3 @ X1 )
               => ~ ( X2 @ X3 ) ) )
       => ( ! [X1: $i,X2: $i > $o] :
              ( ! [X3: $i] :
                  ( ( in @ X3 @ X1 )
                 => ~ ( X2 @ X3 ) )
             => ! [X3: $i] :
                  ( ( in @ X3 @ X1 )
                 => ~ ( X2 @ X3 ) ) )
         => ( ! [X1: $i,X2: $i > $o] :
                ( ~ ! [X3: $i] :
                      ( ( in @ X3 @ X1 )
                     => ( X2 @ X3 ) )
               => ~ ! [X3: $i] :
                      ( ( in @ X3 @ X1 )
                     => ( X2 @ X3 ) ) )
           => ( ! [X1: $o] :
                  ( X1
                 => ( in @ emptyset @ ( prop2set @ X1 ) ) )
             => ( ! [X1: $o] :
                    ( X1
                   => ( set2prop @ ( prop2set @ X1 ) ) )
               => ( ! [X1: $i,X2: $i > $o] :
                      ( ! [X3: $i] :
                          ( ( in @ X3 @ X1 )
                         => ~ ( X2 @ X3 ) )
                     => ! [X3: $i] :
                          ( ( in @ X3 @ X1 )
                         => ~ ( X2 @ X3 ) ) )
                 => ( ! [X1: $i,X2: $i > $o] :
                        ( ~ ! [X3: $i] :
                              ( ( in @ X3 @ X1 )
                             => ( X2 @ X3 ) )
                       => ~ ! [X3: $i] :
                              ( ( in @ X3 @ X1 )
                             => ( X2 @ X3 ) ) )
                   => ( ! [X1: $i > $o] :
                          ( ~ ! [X2: $i] :
                                ( ( X1 @ X2 )
                               => ~ ! [X3: $i] :
                                      ( ( X1 @ X3 )
                                     => ( X2 = X3 ) ) )
                         => ~ ! [X2: $i] :
                                ( ( X1 @ X2 )
                               => ~ ! [X3: $i] :
                                      ( ( X1 @ X3 )
                                     => ( X2 = X3 ) ) ) )
                     => ( ! [X1: $i > $o] :
                            ( ~ ! [X2: $i] :
                                  ~ ( X1 @ X2 )
                           => ( ! [X2: $i,X3: $i] :
                                  ( ( X1 @ X2 )
                                 => ( ( X1 @ X3 )
                                   => ( X2 = X3 ) ) )
                             => ~ ! [X2: $i] :
                                    ( ( X1 @ X2 )
                                   => ~ ! [X3: $i] :
                                          ( ( X1 @ X3 )
                                         => ( X2 = X3 ) ) ) ) )
                       => ! [X1: $i > $o] :
                            ( ~ ! [X2: $i] :
                                  ~ ! [X3: $i] :
                                      ( ( X1 @ X3 )
                                      = ( X3 = X2 ) )
                           => ~ ! [X2: $i] :
                                  ( ( X1 @ X2 )
                                 => ~ ! [X3: $i] :
                                        ( ( X1 @ X3 )
                                       => ( X2 = X3 ) ) ) ) ) ) ) ) ) ) ) ) ) ),
    introduced(assumption,[]) ).

thf(h101,assumption,
    ! [X1: $i,X2: $i > $o] :
      ( ~ ! [X3: $i] :
            ( ( in @ X3 @ X1 )
           => ( X2 @ X3 ) )
     => ~ ! [X3: $i] :
            ( ( in @ X3 @ X1 )
           => ( X2 @ X3 ) ) ),
    introduced(assumption,[]) ).

thf(h102,assumption,
    ~ ( ! [X1: $i,X2: $i > $o] :
          ( ! [X3: $i] :
              ( ( in @ X3 @ X1 )
             => ~ ( X2 @ X3 ) )
         => ! [X3: $i] :
              ( ( in @ X3 @ X1 )
             => ~ ( X2 @ X3 ) ) )
     => ( ! [X1: $i,X2: $i > $o] :
            ( ! [X3: $i] :
                ( ( in @ X3 @ X1 )
               => ~ ( X2 @ X3 ) )
           => ! [X3: $i] :
                ( ( in @ X3 @ X1 )
               => ~ ( X2 @ X3 ) ) )
       => ( ! [X1: $i,X2: $i > $o] :
              ( ~ ! [X3: $i] :
                    ( ( in @ X3 @ X1 )
                   => ( X2 @ X3 ) )
             => ~ ! [X3: $i] :
                    ( ( in @ X3 @ X1 )
                   => ( X2 @ X3 ) ) )
         => ( ! [X1: $o] :
                ( X1
               => ( in @ emptyset @ ( prop2set @ X1 ) ) )
           => ( ! [X1: $o] :
                  ( X1
                 => ( set2prop @ ( prop2set @ X1 ) ) )
             => ( ! [X1: $i,X2: $i > $o] :
                    ( ! [X3: $i] :
                        ( ( in @ X3 @ X1 )
                       => ~ ( X2 @ X3 ) )
                   => ! [X3: $i] :
                        ( ( in @ X3 @ X1 )
                       => ~ ( X2 @ X3 ) ) )
               => ( ! [X1: $i,X2: $i > $o] :
                      ( ~ ! [X3: $i] :
                            ( ( in @ X3 @ X1 )
                           => ( X2 @ X3 ) )
                     => ~ ! [X3: $i] :
                            ( ( in @ X3 @ X1 )
                           => ( X2 @ X3 ) ) )
                 => ( ! [X1: $i > $o] :
                        ( ~ ! [X2: $i] :
                              ( ( X1 @ X2 )
                             => ~ ! [X3: $i] :
                                    ( ( X1 @ X3 )
                                   => ( X2 = X3 ) ) )
                       => ~ ! [X2: $i] :
                              ( ( X1 @ X2 )
                             => ~ ! [X3: $i] :
                                    ( ( X1 @ X3 )
                                   => ( X2 = X3 ) ) ) )
                   => ( ! [X1: $i > $o] :
                          ( ~ ! [X2: $i] :
                                ~ ( X1 @ X2 )
                         => ( ! [X2: $i,X3: $i] :
                                ( ( X1 @ X2 )
                               => ( ( X1 @ X3 )
                                 => ( X2 = X3 ) ) )
                           => ~ ! [X2: $i] :
                                  ( ( X1 @ X2 )
                                 => ~ ! [X3: $i] :
                                        ( ( X1 @ X3 )
                                       => ( X2 = X3 ) ) ) ) )
                     => ! [X1: $i > $o] :
                          ( ~ ! [X2: $i] :
                                ~ ! [X3: $i] :
                                    ( ( X1 @ X3 )
                                    = ( X3 = X2 ) )
                         => ~ ! [X2: $i] :
                                ( ( X1 @ X2 )
                               => ~ ! [X3: $i] :
                                      ( ( X1 @ X3 )
                                     => ( X2 = X3 ) ) ) ) ) ) ) ) ) ) ) ) ),
    introduced(assumption,[]) ).

thf(h103,assumption,
    ! [X1: $i,X2: $i > $o] :
      ( ! [X3: $i] :
          ( ( in @ X3 @ X1 )
         => ~ ( X2 @ X3 ) )
     => ! [X3: $i] :
          ( ( in @ X3 @ X1 )
         => ~ ( X2 @ X3 ) ) ),
    introduced(assumption,[]) ).

thf(h104,assumption,
    ~ ( ! [X1: $i,X2: $i > $o] :
          ( ! [X3: $i] :
              ( ( in @ X3 @ X1 )
             => ~ ( X2 @ X3 ) )
         => ! [X3: $i] :
              ( ( in @ X3 @ X1 )
             => ~ ( X2 @ X3 ) ) )
     => ( ! [X1: $i,X2: $i > $o] :
            ( ~ ! [X3: $i] :
                  ( ( in @ X3 @ X1 )
                 => ( X2 @ X3 ) )
           => ~ ! [X3: $i] :
                  ( ( in @ X3 @ X1 )
                 => ( X2 @ X3 ) ) )
       => ( ! [X1: $o] :
              ( X1
             => ( in @ emptyset @ ( prop2set @ X1 ) ) )
         => ( ! [X1: $o] :
                ( X1
               => ( set2prop @ ( prop2set @ X1 ) ) )
           => ( ! [X1: $i,X2: $i > $o] :
                  ( ! [X3: $i] :
                      ( ( in @ X3 @ X1 )
                     => ~ ( X2 @ X3 ) )
                 => ! [X3: $i] :
                      ( ( in @ X3 @ X1 )
                     => ~ ( X2 @ X3 ) ) )
             => ( ! [X1: $i,X2: $i > $o] :
                    ( ~ ! [X3: $i] :
                          ( ( in @ X3 @ X1 )
                         => ( X2 @ X3 ) )
                   => ~ ! [X3: $i] :
                          ( ( in @ X3 @ X1 )
                         => ( X2 @ X3 ) ) )
               => ( ! [X1: $i > $o] :
                      ( ~ ! [X2: $i] :
                            ( ( X1 @ X2 )
                           => ~ ! [X3: $i] :
                                  ( ( X1 @ X3 )
                                 => ( X2 = X3 ) ) )
                     => ~ ! [X2: $i] :
                            ( ( X1 @ X2 )
                           => ~ ! [X3: $i] :
                                  ( ( X1 @ X3 )
                                 => ( X2 = X3 ) ) ) )
                 => ( ! [X1: $i > $o] :
                        ( ~ ! [X2: $i] :
                              ~ ( X1 @ X2 )
                       => ( ! [X2: $i,X3: $i] :
                              ( ( X1 @ X2 )
                             => ( ( X1 @ X3 )
                               => ( X2 = X3 ) ) )
                         => ~ ! [X2: $i] :
                                ( ( X1 @ X2 )
                               => ~ ! [X3: $i] :
                                      ( ( X1 @ X3 )
                                     => ( X2 = X3 ) ) ) ) )
                   => ! [X1: $i > $o] :
                        ( ~ ! [X2: $i] :
                              ~ ! [X3: $i] :
                                  ( ( X1 @ X3 )
                                  = ( X3 = X2 ) )
                       => ~ ! [X2: $i] :
                              ( ( X1 @ X2 )
                             => ~ ! [X3: $i] :
                                    ( ( X1 @ X3 )
                                   => ( X2 = X3 ) ) ) ) ) ) ) ) ) ) ) ),
    introduced(assumption,[]) ).

thf(h105,assumption,
    ~ ( ! [X1: $i,X2: $i > $o] :
          ( ~ ! [X3: $i] :
                ( ( in @ X3 @ X1 )
               => ( X2 @ X3 ) )
         => ~ ! [X3: $i] :
                ( ( in @ X3 @ X1 )
               => ( X2 @ X3 ) ) )
     => ( ! [X1: $o] :
            ( X1
           => ( in @ emptyset @ ( prop2set @ X1 ) ) )
       => ( ! [X1: $o] :
              ( X1
             => ( set2prop @ ( prop2set @ X1 ) ) )
         => ( ! [X1: $i,X2: $i > $o] :
                ( ! [X3: $i] :
                    ( ( in @ X3 @ X1 )
                   => ~ ( X2 @ X3 ) )
               => ! [X3: $i] :
                    ( ( in @ X3 @ X1 )
                   => ~ ( X2 @ X3 ) ) )
           => ( ! [X1: $i,X2: $i > $o] :
                  ( ~ ! [X3: $i] :
                        ( ( in @ X3 @ X1 )
                       => ( X2 @ X3 ) )
                 => ~ ! [X3: $i] :
                        ( ( in @ X3 @ X1 )
                       => ( X2 @ X3 ) ) )
             => ( ! [X1: $i > $o] :
                    ( ~ ! [X2: $i] :
                          ( ( X1 @ X2 )
                         => ~ ! [X3: $i] :
                                ( ( X1 @ X3 )
                               => ( X2 = X3 ) ) )
                   => ~ ! [X2: $i] :
                          ( ( X1 @ X2 )
                         => ~ ! [X3: $i] :
                                ( ( X1 @ X3 )
                               => ( X2 = X3 ) ) ) )
               => ( ! [X1: $i > $o] :
                      ( ~ ! [X2: $i] :
                            ~ ( X1 @ X2 )
                     => ( ! [X2: $i,X3: $i] :
                            ( ( X1 @ X2 )
                           => ( ( X1 @ X3 )
                             => ( X2 = X3 ) ) )
                       => ~ ! [X2: $i] :
                              ( ( X1 @ X2 )
                             => ~ ! [X3: $i] :
                                    ( ( X1 @ X3 )
                                   => ( X2 = X3 ) ) ) ) )
                 => ! [X1: $i > $o] :
                      ( ~ ! [X2: $i] :
                            ~ ! [X3: $i] :
                                ( ( X1 @ X3 )
                                = ( X3 = X2 ) )
                     => ~ ! [X2: $i] :
                            ( ( X1 @ X2 )
                           => ~ ! [X3: $i] :
                                  ( ( X1 @ X3 )
                                 => ( X2 = X3 ) ) ) ) ) ) ) ) ) ) ),
    introduced(assumption,[]) ).

thf(h106,assumption,
    ~ ( ! [X1: $o] :
          ( X1
         => ( in @ emptyset @ ( prop2set @ X1 ) ) )
     => ( ! [X1: $o] :
            ( X1
           => ( set2prop @ ( prop2set @ X1 ) ) )
       => ( ! [X1: $i,X2: $i > $o] :
              ( ! [X3: $i] :
                  ( ( in @ X3 @ X1 )
                 => ~ ( X2 @ X3 ) )
             => ! [X3: $i] :
                  ( ( in @ X3 @ X1 )
                 => ~ ( X2 @ X3 ) ) )
         => ( ! [X1: $i,X2: $i > $o] :
                ( ~ ! [X3: $i] :
                      ( ( in @ X3 @ X1 )
                     => ( X2 @ X3 ) )
               => ~ ! [X3: $i] :
                      ( ( in @ X3 @ X1 )
                     => ( X2 @ X3 ) ) )
           => ( ! [X1: $i > $o] :
                  ( ~ ! [X2: $i] :
                        ( ( X1 @ X2 )
                       => ~ ! [X3: $i] :
                              ( ( X1 @ X3 )
                             => ( X2 = X3 ) ) )
                 => ~ ! [X2: $i] :
                        ( ( X1 @ X2 )
                       => ~ ! [X3: $i] :
                              ( ( X1 @ X3 )
                             => ( X2 = X3 ) ) ) )
             => ( ! [X1: $i > $o] :
                    ( ~ ! [X2: $i] :
                          ~ ( X1 @ X2 )
                   => ( ! [X2: $i,X3: $i] :
                          ( ( X1 @ X2 )
                         => ( ( X1 @ X3 )
                           => ( X2 = X3 ) ) )
                     => ~ ! [X2: $i] :
                            ( ( X1 @ X2 )
                           => ~ ! [X3: $i] :
                                  ( ( X1 @ X3 )
                                 => ( X2 = X3 ) ) ) ) )
               => ! [X1: $i > $o] :
                    ( ~ ! [X2: $i] :
                          ~ ! [X3: $i] :
                              ( ( X1 @ X3 )
                              = ( X3 = X2 ) )
                   => ~ ! [X2: $i] :
                          ( ( X1 @ X2 )
                         => ~ ! [X3: $i] :
                                ( ( X1 @ X3 )
                               => ( X2 = X3 ) ) ) ) ) ) ) ) ) ),
    introduced(assumption,[]) ).

thf(h107,assumption,
    ! [X1: $o] :
      ( X1
     => ( in @ emptyset @ ( prop2set @ X1 ) ) ),
    introduced(assumption,[]) ).

thf(h108,assumption,
    ~ ( ! [X1: $o] :
          ( X1
         => ( set2prop @ ( prop2set @ X1 ) ) )
     => ( ! [X1: $i,X2: $i > $o] :
            ( ! [X3: $i] :
                ( ( in @ X3 @ X1 )
               => ~ ( X2 @ X3 ) )
           => ! [X3: $i] :
                ( ( in @ X3 @ X1 )
               => ~ ( X2 @ X3 ) ) )
       => ( ! [X1: $i,X2: $i > $o] :
              ( ~ ! [X3: $i] :
                    ( ( in @ X3 @ X1 )
                   => ( X2 @ X3 ) )
             => ~ ! [X3: $i] :
                    ( ( in @ X3 @ X1 )
                   => ( X2 @ X3 ) ) )
         => ( ! [X1: $i > $o] :
                ( ~ ! [X2: $i] :
                      ( ( X1 @ X2 )
                     => ~ ! [X3: $i] :
                            ( ( X1 @ X3 )
                           => ( X2 = X3 ) ) )
               => ~ ! [X2: $i] :
                      ( ( X1 @ X2 )
                     => ~ ! [X3: $i] :
                            ( ( X1 @ X3 )
                           => ( X2 = X3 ) ) ) )
           => ( ! [X1: $i > $o] :
                  ( ~ ! [X2: $i] :
                        ~ ( X1 @ X2 )
                 => ( ! [X2: $i,X3: $i] :
                        ( ( X1 @ X2 )
                       => ( ( X1 @ X3 )
                         => ( X2 = X3 ) ) )
                   => ~ ! [X2: $i] :
                          ( ( X1 @ X2 )
                         => ~ ! [X3: $i] :
                                ( ( X1 @ X3 )
                               => ( X2 = X3 ) ) ) ) )
             => ! [X1: $i > $o] :
                  ( ~ ! [X2: $i] :
                        ~ ! [X3: $i] :
                            ( ( X1 @ X3 )
                            = ( X3 = X2 ) )
                 => ~ ! [X2: $i] :
                        ( ( X1 @ X2 )
                       => ~ ! [X3: $i] :
                              ( ( X1 @ X3 )
                             => ( X2 = X3 ) ) ) ) ) ) ) ) ),
    introduced(assumption,[]) ).

thf(h109,assumption,
    ! [X1: $o] :
      ( X1
     => ( set2prop @ ( prop2set @ X1 ) ) ),
    introduced(assumption,[]) ).

thf(h110,assumption,
    ~ ( ! [X1: $i,X2: $i > $o] :
          ( ! [X3: $i] :
              ( ( in @ X3 @ X1 )
             => ~ ( X2 @ X3 ) )
         => ! [X3: $i] :
              ( ( in @ X3 @ X1 )
             => ~ ( X2 @ X3 ) ) )
     => ( ! [X1: $i,X2: $i > $o] :
            ( ~ ! [X3: $i] :
                  ( ( in @ X3 @ X1 )
                 => ( X2 @ X3 ) )
           => ~ ! [X3: $i] :
                  ( ( in @ X3 @ X1 )
                 => ( X2 @ X3 ) ) )
       => ( ! [X1: $i > $o] :
              ( ~ ! [X2: $i] :
                    ( ( X1 @ X2 )
                   => ~ ! [X3: $i] :
                          ( ( X1 @ X3 )
                         => ( X2 = X3 ) ) )
             => ~ ! [X2: $i] :
                    ( ( X1 @ X2 )
                   => ~ ! [X3: $i] :
                          ( ( X1 @ X3 )
                         => ( X2 = X3 ) ) ) )
         => ( ! [X1: $i > $o] :
                ( ~ ! [X2: $i] :
                      ~ ( X1 @ X2 )
               => ( ! [X2: $i,X3: $i] :
                      ( ( X1 @ X2 )
                     => ( ( X1 @ X3 )
                       => ( X2 = X3 ) ) )
                 => ~ ! [X2: $i] :
                        ( ( X1 @ X2 )
                       => ~ ! [X3: $i] :
                              ( ( X1 @ X3 )
                             => ( X2 = X3 ) ) ) ) )
           => ! [X1: $i > $o] :
                ( ~ ! [X2: $i] :
                      ~ ! [X3: $i] :
                          ( ( X1 @ X3 )
                          = ( X3 = X2 ) )
               => ~ ! [X2: $i] :
                      ( ( X1 @ X2 )
                     => ~ ! [X3: $i] :
                            ( ( X1 @ X3 )
                           => ( X2 = X3 ) ) ) ) ) ) ) ),
    introduced(assumption,[]) ).

thf(h111,assumption,
    ~ ( ! [X1: $i,X2: $i > $o] :
          ( ~ ! [X3: $i] :
                ( ( in @ X3 @ X1 )
               => ( X2 @ X3 ) )
         => ~ ! [X3: $i] :
                ( ( in @ X3 @ X1 )
               => ( X2 @ X3 ) ) )
     => ( ! [X1: $i > $o] :
            ( ~ ! [X2: $i] :
                  ( ( X1 @ X2 )
                 => ~ ! [X3: $i] :
                        ( ( X1 @ X3 )
                       => ( X2 = X3 ) ) )
           => ~ ! [X2: $i] :
                  ( ( X1 @ X2 )
                 => ~ ! [X3: $i] :
                        ( ( X1 @ X3 )
                       => ( X2 = X3 ) ) ) )
       => ( ! [X1: $i > $o] :
              ( ~ ! [X2: $i] :
                    ~ ( X1 @ X2 )
             => ( ! [X2: $i,X3: $i] :
                    ( ( X1 @ X2 )
                   => ( ( X1 @ X3 )
                     => ( X2 = X3 ) ) )
               => ~ ! [X2: $i] :
                      ( ( X1 @ X2 )
                     => ~ ! [X3: $i] :
                            ( ( X1 @ X3 )
                           => ( X2 = X3 ) ) ) ) )
         => ! [X1: $i > $o] :
              ( ~ ! [X2: $i] :
                    ~ ! [X3: $i] :
                        ( ( X1 @ X3 )
                        = ( X3 = X2 ) )
             => ~ ! [X2: $i] :
                    ( ( X1 @ X2 )
                   => ~ ! [X3: $i] :
                          ( ( X1 @ X3 )
                         => ( X2 = X3 ) ) ) ) ) ) ),
    introduced(assumption,[]) ).

thf(h112,assumption,
    ~ ( ! [X1: $i > $o] :
          ( ~ ! [X2: $i] :
                ( ( X1 @ X2 )
               => ~ ! [X3: $i] :
                      ( ( X1 @ X3 )
                     => ( X2 = X3 ) ) )
         => ~ ! [X2: $i] :
                ( ( X1 @ X2 )
               => ~ ! [X3: $i] :
                      ( ( X1 @ X3 )
                     => ( X2 = X3 ) ) ) )
     => ( ! [X1: $i > $o] :
            ( ~ ! [X2: $i] :
                  ~ ( X1 @ X2 )
           => ( ! [X2: $i,X3: $i] :
                  ( ( X1 @ X2 )
                 => ( ( X1 @ X3 )
                   => ( X2 = X3 ) ) )
             => ~ ! [X2: $i] :
                    ( ( X1 @ X2 )
                   => ~ ! [X3: $i] :
                          ( ( X1 @ X3 )
                         => ( X2 = X3 ) ) ) ) )
       => ! [X1: $i > $o] :
            ( ~ ! [X2: $i] :
                  ~ ! [X3: $i] :
                      ( ( X1 @ X3 )
                      = ( X3 = X2 ) )
           => ~ ! [X2: $i] :
                  ( ( X1 @ X2 )
                 => ~ ! [X3: $i] :
                        ( ( X1 @ X3 )
                       => ( X2 = X3 ) ) ) ) ) ),
    introduced(assumption,[]) ).

thf(h113,assumption,
    ~ ( ! [X1: $i > $o] :
          ( ~ ! [X2: $i] :
                ~ ( X1 @ X2 )
         => ( ! [X2: $i,X3: $i] :
                ( ( X1 @ X2 )
               => ( ( X1 @ X3 )
                 => ( X2 = X3 ) ) )
           => ~ ! [X2: $i] :
                  ( ( X1 @ X2 )
                 => ~ ! [X3: $i] :
                        ( ( X1 @ X3 )
                       => ( X2 = X3 ) ) ) ) )
     => ! [X1: $i > $o] :
          ( ~ ! [X2: $i] :
                ~ ! [X3: $i] :
                    ( ( X1 @ X3 )
                    = ( X3 = X2 ) )
         => ~ ! [X2: $i] :
                ( ( X1 @ X2 )
               => ~ ! [X3: $i] :
                      ( ( X1 @ X3 )
                     => ( X2 = X3 ) ) ) ) ),
    introduced(assumption,[]) ).

thf(h114,assumption,
    ! [X1: $i > $o] :
      ( ~ ! [X2: $i] :
            ~ ( X1 @ X2 )
     => ( ! [X2: $i,X3: $i] :
            ( ( X1 @ X2 )
           => ( ( X1 @ X3 )
             => ( X2 = X3 ) ) )
       => ~ ! [X2: $i] :
              ( ( X1 @ X2 )
             => ~ ! [X3: $i] :
                    ( ( X1 @ X3 )
                   => ( X2 = X3 ) ) ) ) ),
    introduced(assumption,[]) ).

thf(h115,assumption,
    ~ ! [X1: $i > $o] :
        ( ~ ! [X2: $i] :
              ~ ! [X3: $i] :
                  ( ( X1 @ X3 )
                  = ( X3 = X2 ) )
       => ~ ! [X2: $i] :
              ( ( X1 @ X2 )
             => ~ ! [X3: $i] :
                    ( ( X1 @ X3 )
                   => ( X2 = X3 ) ) ) ),
    introduced(assumption,[]) ).

thf(h116,assumption,
    ~ ( ~ ! [X1: $i] :
            ~ ! [X2: $i] :
                ( ( eigen__0 @ X2 )
                = ( X2 = X1 ) )
     => ~ sP13 ),
    introduced(assumption,[]) ).

thf(h117,assumption,
    ~ ! [X1: $i] :
        ~ ! [X2: $i] :
            ( ( eigen__0 @ X2 )
            = ( X2 = X1 ) ),
    introduced(assumption,[]) ).

thf(h118,assumption,
    sP13,
    introduced(assumption,[]) ).

thf(h119,assumption,
    sP1,
    introduced(assumption,[]) ).

thf(1,plain,
    ( ~ sP15
    | sP2
    | ~ sP6 ),
    inference(prop_rule,[status(thm)],]) ).

thf(2,plain,
    ( ~ sP7
    | ~ sP14
    | sP11 ),
    inference(prop_rule,[status(thm)],]) ).

thf(3,plain,
    sP6,
    inference(prop_rule,[status(thm)],]) ).

thf(4,plain,
    ( ~ sP1
    | sP7 ),
    inference(all_rule,[status(thm)],]) ).

thf(5,plain,
    ( ~ sP10
    | ~ sP11
    | sP8 ),
    inference(prop_rule,[status(thm)],]) ).

thf(6,plain,
    ( ~ sP4
    | sP10 ),
    inference(all_rule,[status(thm)],]) ).

thf(7,plain,
    ( ~ sP3
    | sP4 ),
    inference(all_rule,[status(thm)],]) ).

thf(8,plain,
    sP3,
    inference(eq_sym,[status(thm)],]) ).

thf(9,plain,
    ( sP5
    | ~ sP8 ),
    inference(prop_rule,[status(thm)],]) ).

thf(10,plain,
    ( sP5
    | sP14 ),
    inference(prop_rule,[status(thm)],]) ).

thf(11,plain,
    ( sP12
    | ~ sP5 ),
    inference(eigen_choice_rule,[status(thm),assumptions([h0])],[h0,eigendef_eigen__2]) ).

thf(12,plain,
    ( ~ sP9
    | ~ sP2
    | ~ sP12 ),
    inference(prop_rule,[status(thm)],]) ).

thf(13,plain,
    ( ~ sP13
    | sP9 ),
    inference(all_rule,[status(thm)],]) ).

thf(14,plain,
    ( ~ sP1
    | sP15 ),
    inference(all_rule,[status(thm)],]) ).

thf(15,plain,
    $false,
    inference(prop_unsat,[status(thm),assumptions([h119,h117,h118,h116,h114,h115,h32,h113,h101,h112,h103,h111,h109,h110,h107,h108,h101,h106,h103,h105,h103,h104,h101,h102,h99,h100,h97,h98,h95,h96,h93,h94,h91,h92,h89,h90,h87,h88,h85,h86,h83,h84,h49,h82,h80,h81,h78,h79,h76,h77,h74,h75,h72,h73,h69,h71,h69,h70,h67,h68,h65,h66,h63,h64,h61,h62,h59,h60,h57,h58,h55,h56,h53,h54,h51,h52,h49,h50,h47,h48,h44,h46,h44,h45,h42,h43,h40,h41,h4,h39,h4,h38,h36,h37,h34,h35,h32,h33,h30,h31,h28,h29,h26,h27,h24,h25,h22,h23,h20,h21,h18,h19,h16,h17,h14,h15,h12,h13,h10,h11,h8,h9,h6,h7,h4,h5,h2,h3,h1,h0])],[1,2,3,4,5,6,7,8,9,10,11,12,13,14,h119,h118]) ).

thf(16,plain,
    $false,
    inference(tab_negall,[status(thm),assumptions([h117,h118,h116,h114,h115,h32,h113,h101,h112,h103,h111,h109,h110,h107,h108,h101,h106,h103,h105,h103,h104,h101,h102,h99,h100,h97,h98,h95,h96,h93,h94,h91,h92,h89,h90,h87,h88,h85,h86,h83,h84,h49,h82,h80,h81,h78,h79,h76,h77,h74,h75,h72,h73,h69,h71,h69,h70,h67,h68,h65,h66,h63,h64,h61,h62,h59,h60,h57,h58,h55,h56,h53,h54,h51,h52,h49,h50,h47,h48,h44,h46,h44,h45,h42,h43,h40,h41,h4,h39,h4,h38,h36,h37,h34,h35,h32,h33,h30,h31,h28,h29,h26,h27,h24,h25,h22,h23,h20,h21,h18,h19,h16,h17,h14,h15,h12,h13,h10,h11,h8,h9,h6,h7,h4,h5,h2,h3,h1,h0]),tab_negall(discharge,[h119]),tab_negall(eigenvar,eigen__1)],[h117,15,h119]) ).

thf(17,plain,
    $false,
    inference(tab_negimp,[status(thm),assumptions([h116,h114,h115,h32,h113,h101,h112,h103,h111,h109,h110,h107,h108,h101,h106,h103,h105,h103,h104,h101,h102,h99,h100,h97,h98,h95,h96,h93,h94,h91,h92,h89,h90,h87,h88,h85,h86,h83,h84,h49,h82,h80,h81,h78,h79,h76,h77,h74,h75,h72,h73,h69,h71,h69,h70,h67,h68,h65,h66,h63,h64,h61,h62,h59,h60,h57,h58,h55,h56,h53,h54,h51,h52,h49,h50,h47,h48,h44,h46,h44,h45,h42,h43,h40,h41,h4,h39,h4,h38,h36,h37,h34,h35,h32,h33,h30,h31,h28,h29,h26,h27,h24,h25,h22,h23,h20,h21,h18,h19,h16,h17,h14,h15,h12,h13,h10,h11,h8,h9,h6,h7,h4,h5,h2,h3,h1,h0]),tab_negimp(discharge,[h117,h118])],[h116,16,h117,h118]) ).

thf(18,plain,
    $false,
    inference(tab_negall,[status(thm),assumptions([h114,h115,h32,h113,h101,h112,h103,h111,h109,h110,h107,h108,h101,h106,h103,h105,h103,h104,h101,h102,h99,h100,h97,h98,h95,h96,h93,h94,h91,h92,h89,h90,h87,h88,h85,h86,h83,h84,h49,h82,h80,h81,h78,h79,h76,h77,h74,h75,h72,h73,h69,h71,h69,h70,h67,h68,h65,h66,h63,h64,h61,h62,h59,h60,h57,h58,h55,h56,h53,h54,h51,h52,h49,h50,h47,h48,h44,h46,h44,h45,h42,h43,h40,h41,h4,h39,h4,h38,h36,h37,h34,h35,h32,h33,h30,h31,h28,h29,h26,h27,h24,h25,h22,h23,h20,h21,h18,h19,h16,h17,h14,h15,h12,h13,h10,h11,h8,h9,h6,h7,h4,h5,h2,h3,h1,h0]),tab_negall(discharge,[h116]),tab_negall(eigenvar,eigen__0)],[h115,17,h116]) ).

thf(19,plain,
    $false,
    inference(tab_negimp,[status(thm),assumptions([h32,h113,h101,h112,h103,h111,h109,h110,h107,h108,h101,h106,h103,h105,h103,h104,h101,h102,h99,h100,h97,h98,h95,h96,h93,h94,h91,h92,h89,h90,h87,h88,h85,h86,h83,h84,h49,h82,h80,h81,h78,h79,h76,h77,h74,h75,h72,h73,h69,h71,h69,h70,h67,h68,h65,h66,h63,h64,h61,h62,h59,h60,h57,h58,h55,h56,h53,h54,h51,h52,h49,h50,h47,h48,h44,h46,h44,h45,h42,h43,h40,h41,h4,h39,h4,h38,h36,h37,h34,h35,h32,h33,h30,h31,h28,h29,h26,h27,h24,h25,h22,h23,h20,h21,h18,h19,h16,h17,h14,h15,h12,h13,h10,h11,h8,h9,h6,h7,h4,h5,h2,h3,h1,h0]),tab_negimp(discharge,[h114,h115])],[h113,18,h114,h115]) ).

thf(20,plain,
    $false,
    inference(tab_negimp,[status(thm),assumptions([h101,h112,h103,h111,h109,h110,h107,h108,h101,h106,h103,h105,h103,h104,h101,h102,h99,h100,h97,h98,h95,h96,h93,h94,h91,h92,h89,h90,h87,h88,h85,h86,h83,h84,h49,h82,h80,h81,h78,h79,h76,h77,h74,h75,h72,h73,h69,h71,h69,h70,h67,h68,h65,h66,h63,h64,h61,h62,h59,h60,h57,h58,h55,h56,h53,h54,h51,h52,h49,h50,h47,h48,h44,h46,h44,h45,h42,h43,h40,h41,h4,h39,h4,h38,h36,h37,h34,h35,h32,h33,h30,h31,h28,h29,h26,h27,h24,h25,h22,h23,h20,h21,h18,h19,h16,h17,h14,h15,h12,h13,h10,h11,h8,h9,h6,h7,h4,h5,h2,h3,h1,h0]),tab_negimp(discharge,[h32,h113])],[h112,19,h32,h113]) ).

thf(21,plain,
    $false,
    inference(tab_negimp,[status(thm),assumptions([h103,h111,h109,h110,h107,h108,h101,h106,h103,h105,h103,h104,h101,h102,h99,h100,h97,h98,h95,h96,h93,h94,h91,h92,h89,h90,h87,h88,h85,h86,h83,h84,h49,h82,h80,h81,h78,h79,h76,h77,h74,h75,h72,h73,h69,h71,h69,h70,h67,h68,h65,h66,h63,h64,h61,h62,h59,h60,h57,h58,h55,h56,h53,h54,h51,h52,h49,h50,h47,h48,h44,h46,h44,h45,h42,h43,h40,h41,h4,h39,h4,h38,h36,h37,h34,h35,h32,h33,h30,h31,h28,h29,h26,h27,h24,h25,h22,h23,h20,h21,h18,h19,h16,h17,h14,h15,h12,h13,h10,h11,h8,h9,h6,h7,h4,h5,h2,h3,h1,h0]),tab_negimp(discharge,[h101,h112])],[h111,20,h101,h112]) ).

thf(22,plain,
    $false,
    inference(tab_negimp,[status(thm),assumptions([h109,h110,h107,h108,h101,h106,h103,h105,h103,h104,h101,h102,h99,h100,h97,h98,h95,h96,h93,h94,h91,h92,h89,h90,h87,h88,h85,h86,h83,h84,h49,h82,h80,h81,h78,h79,h76,h77,h74,h75,h72,h73,h69,h71,h69,h70,h67,h68,h65,h66,h63,h64,h61,h62,h59,h60,h57,h58,h55,h56,h53,h54,h51,h52,h49,h50,h47,h48,h44,h46,h44,h45,h42,h43,h40,h41,h4,h39,h4,h38,h36,h37,h34,h35,h32,h33,h30,h31,h28,h29,h26,h27,h24,h25,h22,h23,h20,h21,h18,h19,h16,h17,h14,h15,h12,h13,h10,h11,h8,h9,h6,h7,h4,h5,h2,h3,h1,h0]),tab_negimp(discharge,[h103,h111])],[h110,21,h103,h111]) ).

thf(23,plain,
    $false,
    inference(tab_negimp,[status(thm),assumptions([h107,h108,h101,h106,h103,h105,h103,h104,h101,h102,h99,h100,h97,h98,h95,h96,h93,h94,h91,h92,h89,h90,h87,h88,h85,h86,h83,h84,h49,h82,h80,h81,h78,h79,h76,h77,h74,h75,h72,h73,h69,h71,h69,h70,h67,h68,h65,h66,h63,h64,h61,h62,h59,h60,h57,h58,h55,h56,h53,h54,h51,h52,h49,h50,h47,h48,h44,h46,h44,h45,h42,h43,h40,h41,h4,h39,h4,h38,h36,h37,h34,h35,h32,h33,h30,h31,h28,h29,h26,h27,h24,h25,h22,h23,h20,h21,h18,h19,h16,h17,h14,h15,h12,h13,h10,h11,h8,h9,h6,h7,h4,h5,h2,h3,h1,h0]),tab_negimp(discharge,[h109,h110])],[h108,22,h109,h110]) ).

thf(24,plain,
    $false,
    inference(tab_negimp,[status(thm),assumptions([h101,h106,h103,h105,h103,h104,h101,h102,h99,h100,h97,h98,h95,h96,h93,h94,h91,h92,h89,h90,h87,h88,h85,h86,h83,h84,h49,h82,h80,h81,h78,h79,h76,h77,h74,h75,h72,h73,h69,h71,h69,h70,h67,h68,h65,h66,h63,h64,h61,h62,h59,h60,h57,h58,h55,h56,h53,h54,h51,h52,h49,h50,h47,h48,h44,h46,h44,h45,h42,h43,h40,h41,h4,h39,h4,h38,h36,h37,h34,h35,h32,h33,h30,h31,h28,h29,h26,h27,h24,h25,h22,h23,h20,h21,h18,h19,h16,h17,h14,h15,h12,h13,h10,h11,h8,h9,h6,h7,h4,h5,h2,h3,h1,h0]),tab_negimp(discharge,[h107,h108])],[h106,23,h107,h108]) ).

thf(25,plain,
    $false,
    inference(tab_negimp,[status(thm),assumptions([h103,h105,h103,h104,h101,h102,h99,h100,h97,h98,h95,h96,h93,h94,h91,h92,h89,h90,h87,h88,h85,h86,h83,h84,h49,h82,h80,h81,h78,h79,h76,h77,h74,h75,h72,h73,h69,h71,h69,h70,h67,h68,h65,h66,h63,h64,h61,h62,h59,h60,h57,h58,h55,h56,h53,h54,h51,h52,h49,h50,h47,h48,h44,h46,h44,h45,h42,h43,h40,h41,h4,h39,h4,h38,h36,h37,h34,h35,h32,h33,h30,h31,h28,h29,h26,h27,h24,h25,h22,h23,h20,h21,h18,h19,h16,h17,h14,h15,h12,h13,h10,h11,h8,h9,h6,h7,h4,h5,h2,h3,h1,h0]),tab_negimp(discharge,[h101,h106])],[h105,24,h101,h106]) ).

thf(26,plain,
    $false,
    inference(tab_negimp,[status(thm),assumptions([h103,h104,h101,h102,h99,h100,h97,h98,h95,h96,h93,h94,h91,h92,h89,h90,h87,h88,h85,h86,h83,h84,h49,h82,h80,h81,h78,h79,h76,h77,h74,h75,h72,h73,h69,h71,h69,h70,h67,h68,h65,h66,h63,h64,h61,h62,h59,h60,h57,h58,h55,h56,h53,h54,h51,h52,h49,h50,h47,h48,h44,h46,h44,h45,h42,h43,h40,h41,h4,h39,h4,h38,h36,h37,h34,h35,h32,h33,h30,h31,h28,h29,h26,h27,h24,h25,h22,h23,h20,h21,h18,h19,h16,h17,h14,h15,h12,h13,h10,h11,h8,h9,h6,h7,h4,h5,h2,h3,h1,h0]),tab_negimp(discharge,[h103,h105])],[h104,25,h103,h105]) ).

thf(27,plain,
    $false,
    inference(tab_negimp,[status(thm),assumptions([h101,h102,h99,h100,h97,h98,h95,h96,h93,h94,h91,h92,h89,h90,h87,h88,h85,h86,h83,h84,h49,h82,h80,h81,h78,h79,h76,h77,h74,h75,h72,h73,h69,h71,h69,h70,h67,h68,h65,h66,h63,h64,h61,h62,h59,h60,h57,h58,h55,h56,h53,h54,h51,h52,h49,h50,h47,h48,h44,h46,h44,h45,h42,h43,h40,h41,h4,h39,h4,h38,h36,h37,h34,h35,h32,h33,h30,h31,h28,h29,h26,h27,h24,h25,h22,h23,h20,h21,h18,h19,h16,h17,h14,h15,h12,h13,h10,h11,h8,h9,h6,h7,h4,h5,h2,h3,h1,h0]),tab_negimp(discharge,[h103,h104])],[h102,26,h103,h104]) ).

thf(28,plain,
    $false,
    inference(tab_negimp,[status(thm),assumptions([h99,h100,h97,h98,h95,h96,h93,h94,h91,h92,h89,h90,h87,h88,h85,h86,h83,h84,h49,h82,h80,h81,h78,h79,h76,h77,h74,h75,h72,h73,h69,h71,h69,h70,h67,h68,h65,h66,h63,h64,h61,h62,h59,h60,h57,h58,h55,h56,h53,h54,h51,h52,h49,h50,h47,h48,h44,h46,h44,h45,h42,h43,h40,h41,h4,h39,h4,h38,h36,h37,h34,h35,h32,h33,h30,h31,h28,h29,h26,h27,h24,h25,h22,h23,h20,h21,h18,h19,h16,h17,h14,h15,h12,h13,h10,h11,h8,h9,h6,h7,h4,h5,h2,h3,h1,h0]),tab_negimp(discharge,[h101,h102])],[h100,27,h101,h102]) ).

thf(29,plain,
    $false,
    inference(tab_negimp,[status(thm),assumptions([h97,h98,h95,h96,h93,h94,h91,h92,h89,h90,h87,h88,h85,h86,h83,h84,h49,h82,h80,h81,h78,h79,h76,h77,h74,h75,h72,h73,h69,h71,h69,h70,h67,h68,h65,h66,h63,h64,h61,h62,h59,h60,h57,h58,h55,h56,h53,h54,h51,h52,h49,h50,h47,h48,h44,h46,h44,h45,h42,h43,h40,h41,h4,h39,h4,h38,h36,h37,h34,h35,h32,h33,h30,h31,h28,h29,h26,h27,h24,h25,h22,h23,h20,h21,h18,h19,h16,h17,h14,h15,h12,h13,h10,h11,h8,h9,h6,h7,h4,h5,h2,h3,h1,h0]),tab_negimp(discharge,[h99,h100])],[h98,28,h99,h100]) ).

thf(30,plain,
    $false,
    inference(tab_negimp,[status(thm),assumptions([h95,h96,h93,h94,h91,h92,h89,h90,h87,h88,h85,h86,h83,h84,h49,h82,h80,h81,h78,h79,h76,h77,h74,h75,h72,h73,h69,h71,h69,h70,h67,h68,h65,h66,h63,h64,h61,h62,h59,h60,h57,h58,h55,h56,h53,h54,h51,h52,h49,h50,h47,h48,h44,h46,h44,h45,h42,h43,h40,h41,h4,h39,h4,h38,h36,h37,h34,h35,h32,h33,h30,h31,h28,h29,h26,h27,h24,h25,h22,h23,h20,h21,h18,h19,h16,h17,h14,h15,h12,h13,h10,h11,h8,h9,h6,h7,h4,h5,h2,h3,h1,h0]),tab_negimp(discharge,[h97,h98])],[h96,29,h97,h98]) ).

thf(31,plain,
    $false,
    inference(tab_negimp,[status(thm),assumptions([h93,h94,h91,h92,h89,h90,h87,h88,h85,h86,h83,h84,h49,h82,h80,h81,h78,h79,h76,h77,h74,h75,h72,h73,h69,h71,h69,h70,h67,h68,h65,h66,h63,h64,h61,h62,h59,h60,h57,h58,h55,h56,h53,h54,h51,h52,h49,h50,h47,h48,h44,h46,h44,h45,h42,h43,h40,h41,h4,h39,h4,h38,h36,h37,h34,h35,h32,h33,h30,h31,h28,h29,h26,h27,h24,h25,h22,h23,h20,h21,h18,h19,h16,h17,h14,h15,h12,h13,h10,h11,h8,h9,h6,h7,h4,h5,h2,h3,h1,h0]),tab_negimp(discharge,[h95,h96])],[h94,30,h95,h96]) ).

thf(32,plain,
    $false,
    inference(tab_negimp,[status(thm),assumptions([h91,h92,h89,h90,h87,h88,h85,h86,h83,h84,h49,h82,h80,h81,h78,h79,h76,h77,h74,h75,h72,h73,h69,h71,h69,h70,h67,h68,h65,h66,h63,h64,h61,h62,h59,h60,h57,h58,h55,h56,h53,h54,h51,h52,h49,h50,h47,h48,h44,h46,h44,h45,h42,h43,h40,h41,h4,h39,h4,h38,h36,h37,h34,h35,h32,h33,h30,h31,h28,h29,h26,h27,h24,h25,h22,h23,h20,h21,h18,h19,h16,h17,h14,h15,h12,h13,h10,h11,h8,h9,h6,h7,h4,h5,h2,h3,h1,h0]),tab_negimp(discharge,[h93,h94])],[h92,31,h93,h94]) ).

thf(33,plain,
    $false,
    inference(tab_negimp,[status(thm),assumptions([h89,h90,h87,h88,h85,h86,h83,h84,h49,h82,h80,h81,h78,h79,h76,h77,h74,h75,h72,h73,h69,h71,h69,h70,h67,h68,h65,h66,h63,h64,h61,h62,h59,h60,h57,h58,h55,h56,h53,h54,h51,h52,h49,h50,h47,h48,h44,h46,h44,h45,h42,h43,h40,h41,h4,h39,h4,h38,h36,h37,h34,h35,h32,h33,h30,h31,h28,h29,h26,h27,h24,h25,h22,h23,h20,h21,h18,h19,h16,h17,h14,h15,h12,h13,h10,h11,h8,h9,h6,h7,h4,h5,h2,h3,h1,h0]),tab_negimp(discharge,[h91,h92])],[h90,32,h91,h92]) ).

thf(34,plain,
    $false,
    inference(tab_negimp,[status(thm),assumptions([h87,h88,h85,h86,h83,h84,h49,h82,h80,h81,h78,h79,h76,h77,h74,h75,h72,h73,h69,h71,h69,h70,h67,h68,h65,h66,h63,h64,h61,h62,h59,h60,h57,h58,h55,h56,h53,h54,h51,h52,h49,h50,h47,h48,h44,h46,h44,h45,h42,h43,h40,h41,h4,h39,h4,h38,h36,h37,h34,h35,h32,h33,h30,h31,h28,h29,h26,h27,h24,h25,h22,h23,h20,h21,h18,h19,h16,h17,h14,h15,h12,h13,h10,h11,h8,h9,h6,h7,h4,h5,h2,h3,h1,h0]),tab_negimp(discharge,[h89,h90])],[h88,33,h89,h90]) ).

thf(35,plain,
    $false,
    inference(tab_negimp,[status(thm),assumptions([h85,h86,h83,h84,h49,h82,h80,h81,h78,h79,h76,h77,h74,h75,h72,h73,h69,h71,h69,h70,h67,h68,h65,h66,h63,h64,h61,h62,h59,h60,h57,h58,h55,h56,h53,h54,h51,h52,h49,h50,h47,h48,h44,h46,h44,h45,h42,h43,h40,h41,h4,h39,h4,h38,h36,h37,h34,h35,h32,h33,h30,h31,h28,h29,h26,h27,h24,h25,h22,h23,h20,h21,h18,h19,h16,h17,h14,h15,h12,h13,h10,h11,h8,h9,h6,h7,h4,h5,h2,h3,h1,h0]),tab_negimp(discharge,[h87,h88])],[h86,34,h87,h88]) ).

thf(36,plain,
    $false,
    inference(tab_negimp,[status(thm),assumptions([h83,h84,h49,h82,h80,h81,h78,h79,h76,h77,h74,h75,h72,h73,h69,h71,h69,h70,h67,h68,h65,h66,h63,h64,h61,h62,h59,h60,h57,h58,h55,h56,h53,h54,h51,h52,h49,h50,h47,h48,h44,h46,h44,h45,h42,h43,h40,h41,h4,h39,h4,h38,h36,h37,h34,h35,h32,h33,h30,h31,h28,h29,h26,h27,h24,h25,h22,h23,h20,h21,h18,h19,h16,h17,h14,h15,h12,h13,h10,h11,h8,h9,h6,h7,h4,h5,h2,h3,h1,h0]),tab_negimp(discharge,[h85,h86])],[h84,35,h85,h86]) ).

thf(37,plain,
    $false,
    inference(tab_negimp,[status(thm),assumptions([h49,h82,h80,h81,h78,h79,h76,h77,h74,h75,h72,h73,h69,h71,h69,h70,h67,h68,h65,h66,h63,h64,h61,h62,h59,h60,h57,h58,h55,h56,h53,h54,h51,h52,h49,h50,h47,h48,h44,h46,h44,h45,h42,h43,h40,h41,h4,h39,h4,h38,h36,h37,h34,h35,h32,h33,h30,h31,h28,h29,h26,h27,h24,h25,h22,h23,h20,h21,h18,h19,h16,h17,h14,h15,h12,h13,h10,h11,h8,h9,h6,h7,h4,h5,h2,h3,h1,h0]),tab_negimp(discharge,[h83,h84])],[h82,36,h83,h84]) ).

thf(38,plain,
    $false,
    inference(tab_negimp,[status(thm),assumptions([h80,h81,h78,h79,h76,h77,h74,h75,h72,h73,h69,h71,h69,h70,h67,h68,h65,h66,h63,h64,h61,h62,h59,h60,h57,h58,h55,h56,h53,h54,h51,h52,h49,h50,h47,h48,h44,h46,h44,h45,h42,h43,h40,h41,h4,h39,h4,h38,h36,h37,h34,h35,h32,h33,h30,h31,h28,h29,h26,h27,h24,h25,h22,h23,h20,h21,h18,h19,h16,h17,h14,h15,h12,h13,h10,h11,h8,h9,h6,h7,h4,h5,h2,h3,h1,h0]),tab_negimp(discharge,[h49,h82])],[h81,37,h49,h82]) ).

thf(39,plain,
    $false,
    inference(tab_negimp,[status(thm),assumptions([h78,h79,h76,h77,h74,h75,h72,h73,h69,h71,h69,h70,h67,h68,h65,h66,h63,h64,h61,h62,h59,h60,h57,h58,h55,h56,h53,h54,h51,h52,h49,h50,h47,h48,h44,h46,h44,h45,h42,h43,h40,h41,h4,h39,h4,h38,h36,h37,h34,h35,h32,h33,h30,h31,h28,h29,h26,h27,h24,h25,h22,h23,h20,h21,h18,h19,h16,h17,h14,h15,h12,h13,h10,h11,h8,h9,h6,h7,h4,h5,h2,h3,h1,h0]),tab_negimp(discharge,[h80,h81])],[h79,38,h80,h81]) ).

thf(40,plain,
    $false,
    inference(tab_negimp,[status(thm),assumptions([h76,h77,h74,h75,h72,h73,h69,h71,h69,h70,h67,h68,h65,h66,h63,h64,h61,h62,h59,h60,h57,h58,h55,h56,h53,h54,h51,h52,h49,h50,h47,h48,h44,h46,h44,h45,h42,h43,h40,h41,h4,h39,h4,h38,h36,h37,h34,h35,h32,h33,h30,h31,h28,h29,h26,h27,h24,h25,h22,h23,h20,h21,h18,h19,h16,h17,h14,h15,h12,h13,h10,h11,h8,h9,h6,h7,h4,h5,h2,h3,h1,h0]),tab_negimp(discharge,[h78,h79])],[h77,39,h78,h79]) ).

thf(41,plain,
    $false,
    inference(tab_negimp,[status(thm),assumptions([h74,h75,h72,h73,h69,h71,h69,h70,h67,h68,h65,h66,h63,h64,h61,h62,h59,h60,h57,h58,h55,h56,h53,h54,h51,h52,h49,h50,h47,h48,h44,h46,h44,h45,h42,h43,h40,h41,h4,h39,h4,h38,h36,h37,h34,h35,h32,h33,h30,h31,h28,h29,h26,h27,h24,h25,h22,h23,h20,h21,h18,h19,h16,h17,h14,h15,h12,h13,h10,h11,h8,h9,h6,h7,h4,h5,h2,h3,h1,h0]),tab_negimp(discharge,[h76,h77])],[h75,40,h76,h77]) ).

thf(42,plain,
    $false,
    inference(tab_negimp,[status(thm),assumptions([h72,h73,h69,h71,h69,h70,h67,h68,h65,h66,h63,h64,h61,h62,h59,h60,h57,h58,h55,h56,h53,h54,h51,h52,h49,h50,h47,h48,h44,h46,h44,h45,h42,h43,h40,h41,h4,h39,h4,h38,h36,h37,h34,h35,h32,h33,h30,h31,h28,h29,h26,h27,h24,h25,h22,h23,h20,h21,h18,h19,h16,h17,h14,h15,h12,h13,h10,h11,h8,h9,h6,h7,h4,h5,h2,h3,h1,h0]),tab_negimp(discharge,[h74,h75])],[h73,41,h74,h75]) ).

thf(43,plain,
    $false,
    inference(tab_negimp,[status(thm),assumptions([h69,h71,h69,h70,h67,h68,h65,h66,h63,h64,h61,h62,h59,h60,h57,h58,h55,h56,h53,h54,h51,h52,h49,h50,h47,h48,h44,h46,h44,h45,h42,h43,h40,h41,h4,h39,h4,h38,h36,h37,h34,h35,h32,h33,h30,h31,h28,h29,h26,h27,h24,h25,h22,h23,h20,h21,h18,h19,h16,h17,h14,h15,h12,h13,h10,h11,h8,h9,h6,h7,h4,h5,h2,h3,h1,h0]),tab_negimp(discharge,[h72,h73])],[h71,42,h72,h73]) ).

thf(44,plain,
    $false,
    inference(tab_negimp,[status(thm),assumptions([h69,h70,h67,h68,h65,h66,h63,h64,h61,h62,h59,h60,h57,h58,h55,h56,h53,h54,h51,h52,h49,h50,h47,h48,h44,h46,h44,h45,h42,h43,h40,h41,h4,h39,h4,h38,h36,h37,h34,h35,h32,h33,h30,h31,h28,h29,h26,h27,h24,h25,h22,h23,h20,h21,h18,h19,h16,h17,h14,h15,h12,h13,h10,h11,h8,h9,h6,h7,h4,h5,h2,h3,h1,h0]),tab_negimp(discharge,[h69,h71])],[h70,43,h69,h71]) ).

thf(45,plain,
    $false,
    inference(tab_negimp,[status(thm),assumptions([h67,h68,h65,h66,h63,h64,h61,h62,h59,h60,h57,h58,h55,h56,h53,h54,h51,h52,h49,h50,h47,h48,h44,h46,h44,h45,h42,h43,h40,h41,h4,h39,h4,h38,h36,h37,h34,h35,h32,h33,h30,h31,h28,h29,h26,h27,h24,h25,h22,h23,h20,h21,h18,h19,h16,h17,h14,h15,h12,h13,h10,h11,h8,h9,h6,h7,h4,h5,h2,h3,h1,h0]),tab_negimp(discharge,[h69,h70])],[h68,44,h69,h70]) ).

thf(46,plain,
    $false,
    inference(tab_negimp,[status(thm),assumptions([h65,h66,h63,h64,h61,h62,h59,h60,h57,h58,h55,h56,h53,h54,h51,h52,h49,h50,h47,h48,h44,h46,h44,h45,h42,h43,h40,h41,h4,h39,h4,h38,h36,h37,h34,h35,h32,h33,h30,h31,h28,h29,h26,h27,h24,h25,h22,h23,h20,h21,h18,h19,h16,h17,h14,h15,h12,h13,h10,h11,h8,h9,h6,h7,h4,h5,h2,h3,h1,h0]),tab_negimp(discharge,[h67,h68])],[h66,45,h67,h68]) ).

thf(47,plain,
    $false,
    inference(tab_negimp,[status(thm),assumptions([h63,h64,h61,h62,h59,h60,h57,h58,h55,h56,h53,h54,h51,h52,h49,h50,h47,h48,h44,h46,h44,h45,h42,h43,h40,h41,h4,h39,h4,h38,h36,h37,h34,h35,h32,h33,h30,h31,h28,h29,h26,h27,h24,h25,h22,h23,h20,h21,h18,h19,h16,h17,h14,h15,h12,h13,h10,h11,h8,h9,h6,h7,h4,h5,h2,h3,h1,h0]),tab_negimp(discharge,[h65,h66])],[h64,46,h65,h66]) ).

thf(48,plain,
    $false,
    inference(tab_negimp,[status(thm),assumptions([h61,h62,h59,h60,h57,h58,h55,h56,h53,h54,h51,h52,h49,h50,h47,h48,h44,h46,h44,h45,h42,h43,h40,h41,h4,h39,h4,h38,h36,h37,h34,h35,h32,h33,h30,h31,h28,h29,h26,h27,h24,h25,h22,h23,h20,h21,h18,h19,h16,h17,h14,h15,h12,h13,h10,h11,h8,h9,h6,h7,h4,h5,h2,h3,h1,h0]),tab_negimp(discharge,[h63,h64])],[h62,47,h63,h64]) ).

thf(49,plain,
    $false,
    inference(tab_negimp,[status(thm),assumptions([h59,h60,h57,h58,h55,h56,h53,h54,h51,h52,h49,h50,h47,h48,h44,h46,h44,h45,h42,h43,h40,h41,h4,h39,h4,h38,h36,h37,h34,h35,h32,h33,h30,h31,h28,h29,h26,h27,h24,h25,h22,h23,h20,h21,h18,h19,h16,h17,h14,h15,h12,h13,h10,h11,h8,h9,h6,h7,h4,h5,h2,h3,h1,h0]),tab_negimp(discharge,[h61,h62])],[h60,48,h61,h62]) ).

thf(50,plain,
    $false,
    inference(tab_negimp,[status(thm),assumptions([h57,h58,h55,h56,h53,h54,h51,h52,h49,h50,h47,h48,h44,h46,h44,h45,h42,h43,h40,h41,h4,h39,h4,h38,h36,h37,h34,h35,h32,h33,h30,h31,h28,h29,h26,h27,h24,h25,h22,h23,h20,h21,h18,h19,h16,h17,h14,h15,h12,h13,h10,h11,h8,h9,h6,h7,h4,h5,h2,h3,h1,h0]),tab_negimp(discharge,[h59,h60])],[h58,49,h59,h60]) ).

thf(51,plain,
    $false,
    inference(tab_negimp,[status(thm),assumptions([h55,h56,h53,h54,h51,h52,h49,h50,h47,h48,h44,h46,h44,h45,h42,h43,h40,h41,h4,h39,h4,h38,h36,h37,h34,h35,h32,h33,h30,h31,h28,h29,h26,h27,h24,h25,h22,h23,h20,h21,h18,h19,h16,h17,h14,h15,h12,h13,h10,h11,h8,h9,h6,h7,h4,h5,h2,h3,h1,h0]),tab_negimp(discharge,[h57,h58])],[h56,50,h57,h58]) ).

thf(52,plain,
    $false,
    inference(tab_negimp,[status(thm),assumptions([h53,h54,h51,h52,h49,h50,h47,h48,h44,h46,h44,h45,h42,h43,h40,h41,h4,h39,h4,h38,h36,h37,h34,h35,h32,h33,h30,h31,h28,h29,h26,h27,h24,h25,h22,h23,h20,h21,h18,h19,h16,h17,h14,h15,h12,h13,h10,h11,h8,h9,h6,h7,h4,h5,h2,h3,h1,h0]),tab_negimp(discharge,[h55,h56])],[h54,51,h55,h56]) ).

thf(53,plain,
    $false,
    inference(tab_negimp,[status(thm),assumptions([h51,h52,h49,h50,h47,h48,h44,h46,h44,h45,h42,h43,h40,h41,h4,h39,h4,h38,h36,h37,h34,h35,h32,h33,h30,h31,h28,h29,h26,h27,h24,h25,h22,h23,h20,h21,h18,h19,h16,h17,h14,h15,h12,h13,h10,h11,h8,h9,h6,h7,h4,h5,h2,h3,h1,h0]),tab_negimp(discharge,[h53,h54])],[h52,52,h53,h54]) ).

thf(54,plain,
    $false,
    inference(tab_negimp,[status(thm),assumptions([h49,h50,h47,h48,h44,h46,h44,h45,h42,h43,h40,h41,h4,h39,h4,h38,h36,h37,h34,h35,h32,h33,h30,h31,h28,h29,h26,h27,h24,h25,h22,h23,h20,h21,h18,h19,h16,h17,h14,h15,h12,h13,h10,h11,h8,h9,h6,h7,h4,h5,h2,h3,h1,h0]),tab_negimp(discharge,[h51,h52])],[h50,53,h51,h52]) ).

thf(55,plain,
    $false,
    inference(tab_negimp,[status(thm),assumptions([h47,h48,h44,h46,h44,h45,h42,h43,h40,h41,h4,h39,h4,h38,h36,h37,h34,h35,h32,h33,h30,h31,h28,h29,h26,h27,h24,h25,h22,h23,h20,h21,h18,h19,h16,h17,h14,h15,h12,h13,h10,h11,h8,h9,h6,h7,h4,h5,h2,h3,h1,h0]),tab_negimp(discharge,[h49,h50])],[h48,54,h49,h50]) ).

thf(56,plain,
    $false,
    inference(tab_negimp,[status(thm),assumptions([h44,h46,h44,h45,h42,h43,h40,h41,h4,h39,h4,h38,h36,h37,h34,h35,h32,h33,h30,h31,h28,h29,h26,h27,h24,h25,h22,h23,h20,h21,h18,h19,h16,h17,h14,h15,h12,h13,h10,h11,h8,h9,h6,h7,h4,h5,h2,h3,h1,h0]),tab_negimp(discharge,[h47,h48])],[h46,55,h47,h48]) ).

thf(57,plain,
    $false,
    inference(tab_negimp,[status(thm),assumptions([h44,h45,h42,h43,h40,h41,h4,h39,h4,h38,h36,h37,h34,h35,h32,h33,h30,h31,h28,h29,h26,h27,h24,h25,h22,h23,h20,h21,h18,h19,h16,h17,h14,h15,h12,h13,h10,h11,h8,h9,h6,h7,h4,h5,h2,h3,h1,h0]),tab_negimp(discharge,[h44,h46])],[h45,56,h44,h46]) ).

thf(58,plain,
    $false,
    inference(tab_negimp,[status(thm),assumptions([h42,h43,h40,h41,h4,h39,h4,h38,h36,h37,h34,h35,h32,h33,h30,h31,h28,h29,h26,h27,h24,h25,h22,h23,h20,h21,h18,h19,h16,h17,h14,h15,h12,h13,h10,h11,h8,h9,h6,h7,h4,h5,h2,h3,h1,h0]),tab_negimp(discharge,[h44,h45])],[h43,57,h44,h45]) ).

thf(59,plain,
    $false,
    inference(tab_negimp,[status(thm),assumptions([h40,h41,h4,h39,h4,h38,h36,h37,h34,h35,h32,h33,h30,h31,h28,h29,h26,h27,h24,h25,h22,h23,h20,h21,h18,h19,h16,h17,h14,h15,h12,h13,h10,h11,h8,h9,h6,h7,h4,h5,h2,h3,h1,h0]),tab_negimp(discharge,[h42,h43])],[h41,58,h42,h43]) ).

thf(60,plain,
    $false,
    inference(tab_negimp,[status(thm),assumptions([h4,h39,h4,h38,h36,h37,h34,h35,h32,h33,h30,h31,h28,h29,h26,h27,h24,h25,h22,h23,h20,h21,h18,h19,h16,h17,h14,h15,h12,h13,h10,h11,h8,h9,h6,h7,h4,h5,h2,h3,h1,h0]),tab_negimp(discharge,[h40,h41])],[h39,59,h40,h41]) ).

thf(61,plain,
    $false,
    inference(tab_negimp,[status(thm),assumptions([h4,h38,h36,h37,h34,h35,h32,h33,h30,h31,h28,h29,h26,h27,h24,h25,h22,h23,h20,h21,h18,h19,h16,h17,h14,h15,h12,h13,h10,h11,h8,h9,h6,h7,h4,h5,h2,h3,h1,h0]),tab_negimp(discharge,[h4,h39])],[h38,60,h4,h39]) ).

thf(62,plain,
    $false,
    inference(tab_negimp,[status(thm),assumptions([h36,h37,h34,h35,h32,h33,h30,h31,h28,h29,h26,h27,h24,h25,h22,h23,h20,h21,h18,h19,h16,h17,h14,h15,h12,h13,h10,h11,h8,h9,h6,h7,h4,h5,h2,h3,h1,h0]),tab_negimp(discharge,[h4,h38])],[h37,61,h4,h38]) ).

thf(63,plain,
    $false,
    inference(tab_negimp,[status(thm),assumptions([h34,h35,h32,h33,h30,h31,h28,h29,h26,h27,h24,h25,h22,h23,h20,h21,h18,h19,h16,h17,h14,h15,h12,h13,h10,h11,h8,h9,h6,h7,h4,h5,h2,h3,h1,h0]),tab_negimp(discharge,[h36,h37])],[h35,62,h36,h37]) ).

thf(64,plain,
    $false,
    inference(tab_negimp,[status(thm),assumptions([h32,h33,h30,h31,h28,h29,h26,h27,h24,h25,h22,h23,h20,h21,h18,h19,h16,h17,h14,h15,h12,h13,h10,h11,h8,h9,h6,h7,h4,h5,h2,h3,h1,h0]),tab_negimp(discharge,[h34,h35])],[h33,63,h34,h35]) ).

thf(65,plain,
    $false,
    inference(tab_negimp,[status(thm),assumptions([h30,h31,h28,h29,h26,h27,h24,h25,h22,h23,h20,h21,h18,h19,h16,h17,h14,h15,h12,h13,h10,h11,h8,h9,h6,h7,h4,h5,h2,h3,h1,h0]),tab_negimp(discharge,[h32,h33])],[h31,64,h32,h33]) ).

thf(66,plain,
    $false,
    inference(tab_negimp,[status(thm),assumptions([h28,h29,h26,h27,h24,h25,h22,h23,h20,h21,h18,h19,h16,h17,h14,h15,h12,h13,h10,h11,h8,h9,h6,h7,h4,h5,h2,h3,h1,h0]),tab_negimp(discharge,[h30,h31])],[h29,65,h30,h31]) ).

thf(67,plain,
    $false,
    inference(tab_negimp,[status(thm),assumptions([h26,h27,h24,h25,h22,h23,h20,h21,h18,h19,h16,h17,h14,h15,h12,h13,h10,h11,h8,h9,h6,h7,h4,h5,h2,h3,h1,h0]),tab_negimp(discharge,[h28,h29])],[h27,66,h28,h29]) ).

thf(68,plain,
    $false,
    inference(tab_negimp,[status(thm),assumptions([h24,h25,h22,h23,h20,h21,h18,h19,h16,h17,h14,h15,h12,h13,h10,h11,h8,h9,h6,h7,h4,h5,h2,h3,h1,h0]),tab_negimp(discharge,[h26,h27])],[h25,67,h26,h27]) ).

thf(69,plain,
    $false,
    inference(tab_negimp,[status(thm),assumptions([h22,h23,h20,h21,h18,h19,h16,h17,h14,h15,h12,h13,h10,h11,h8,h9,h6,h7,h4,h5,h2,h3,h1,h0]),tab_negimp(discharge,[h24,h25])],[h23,68,h24,h25]) ).

thf(70,plain,
    $false,
    inference(tab_negimp,[status(thm),assumptions([h20,h21,h18,h19,h16,h17,h14,h15,h12,h13,h10,h11,h8,h9,h6,h7,h4,h5,h2,h3,h1,h0]),tab_negimp(discharge,[h22,h23])],[h21,69,h22,h23]) ).

thf(71,plain,
    $false,
    inference(tab_negimp,[status(thm),assumptions([h18,h19,h16,h17,h14,h15,h12,h13,h10,h11,h8,h9,h6,h7,h4,h5,h2,h3,h1,h0]),tab_negimp(discharge,[h20,h21])],[h19,70,h20,h21]) ).

thf(72,plain,
    $false,
    inference(tab_negimp,[status(thm),assumptions([h16,h17,h14,h15,h12,h13,h10,h11,h8,h9,h6,h7,h4,h5,h2,h3,h1,h0]),tab_negimp(discharge,[h18,h19])],[h17,71,h18,h19]) ).

thf(73,plain,
    $false,
    inference(tab_negimp,[status(thm),assumptions([h14,h15,h12,h13,h10,h11,h8,h9,h6,h7,h4,h5,h2,h3,h1,h0]),tab_negimp(discharge,[h16,h17])],[h15,72,h16,h17]) ).

thf(74,plain,
    $false,
    inference(tab_negimp,[status(thm),assumptions([h12,h13,h10,h11,h8,h9,h6,h7,h4,h5,h2,h3,h1,h0]),tab_negimp(discharge,[h14,h15])],[h13,73,h14,h15]) ).

thf(75,plain,
    $false,
    inference(tab_negimp,[status(thm),assumptions([h10,h11,h8,h9,h6,h7,h4,h5,h2,h3,h1,h0]),tab_negimp(discharge,[h12,h13])],[h11,74,h12,h13]) ).

thf(76,plain,
    $false,
    inference(tab_negimp,[status(thm),assumptions([h8,h9,h6,h7,h4,h5,h2,h3,h1,h0]),tab_negimp(discharge,[h10,h11])],[h9,75,h10,h11]) ).

thf(77,plain,
    $false,
    inference(tab_negimp,[status(thm),assumptions([h6,h7,h4,h5,h2,h3,h1,h0]),tab_negimp(discharge,[h8,h9])],[h7,76,h8,h9]) ).

thf(78,plain,
    $false,
    inference(tab_negimp,[status(thm),assumptions([h4,h5,h2,h3,h1,h0]),tab_negimp(discharge,[h6,h7])],[h5,77,h6,h7]) ).

thf(79,plain,
    $false,
    inference(tab_negimp,[status(thm),assumptions([h2,h3,h1,h0]),tab_negimp(discharge,[h4,h5])],[h3,78,h4,h5]) ).

thf(80,plain,
    $false,
    inference(tab_negimp,[status(thm),assumptions([h1,h0]),tab_negimp(discharge,[h2,h3])],[h1,79,h2,h3]) ).

thf(81,plain,
    $false,
    inference(eigenvar_choice,[status(thm),assumptions([h1]),eigenvar_choice(discharge,[h0])],[80,h0]) ).

thf(0,theorem,
    ( ! [X1: $i,X2: $i] :
        ( ! [X3: $i] :
            ( ( in @ X3 @ X1 )
            = ( in @ X3 @ X2 ) )
       => ( X1 = X2 ) )
   => ( ! [X1: $i] :
          ~ ( in @ X1 @ emptyset )
     => ( ! [X1: $i,X2: $i,X3: $i] :
            ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
            = ( ( X3 != X1 )
             => ( in @ X3 @ X2 ) ) )
       => ( ! [X1: $i,X2: $i] :
              ( ( in @ X2 @ ( powerset @ X1 ) )
              = ( ! [X3: $i] :
                    ( ( in @ X3 @ X2 )
                   => ( in @ X3 @ X1 ) ) ) )
         => ( ! [X1: $i,X2: $i] :
                ( ( in @ X2 @ ( setunion @ X1 ) )
                = ( ~ ! [X3: $i] :
                        ( ( in @ X2 @ X3 )
                       => ~ ( in @ X3 @ X1 ) ) ) )
           => ( ( in @ emptyset @ omega )
             => ( ! [X1: $i] :
                    ( ( in @ X1 @ omega )
                   => ( in @ ( setadjoin @ X1 @ X1 ) @ omega ) )
               => ( ! [X1: $i] :
                      ( ~ ( ( in @ emptyset @ X1 )
                         => ~ ! [X2: $i] :
                                ( ~ ( ( in @ X2 @ omega )
                                   => ~ ( in @ X2 @ X1 ) )
                               => ( in @ ( setadjoin @ X2 @ X2 ) @ X1 ) ) )
                     => ! [X2: $i] :
                          ( ( in @ X2 @ omega )
                         => ( in @ X2 @ X1 ) ) )
                 => ( ! [X1: $i > $i > $o,X2: $i] :
                        ( ! [X3: $i] :
                            ( ( in @ X3 @ X2 )
                           => ~ ! [X4: $i] :
                                  ( ( X1 @ X3 @ X4 )
                                 => ~ ! [X5: $i] :
                                        ( ( X1 @ X3 @ X5 )
                                       => ( X4 = X5 ) ) ) )
                       => ~ ! [X3: $i] :
                              ~ ! [X4: $i] :
                                  ( ( in @ X4 @ X3 )
                                  = ( ~ ! [X5: $i] :
                                          ( ( in @ X5 @ X2 )
                                         => ~ ( X1 @ X5 @ X4 ) ) ) ) )
                   => ( ! [X1: $i] :
                          ( ~ ! [X2: $i] :
                                ~ ( in @ X2 @ X1 )
                         => ~ ! [X2: $i] :
                                ( ( in @ X2 @ X1 )
                               => ~ ! [X3: $i] :
                                      ( ( in @ X3 @ X2 )
                                     => ~ ( in @ X3 @ X1 ) ) ) )
                     => ( ! [X1: $i] :
                            ~ ! [X2: $i] :
                                ( ~ ( ~ ( ! [X3: $i] :
                                            ( ( in @ X3 @ X2 )
                                           => ! [X4: $i] :
                                                ( ( in @ X4 @ X3 )
                                               => ( in @ X4 @ X1 ) ) )
                                       => ~ ! [X3: $i,X4: $i] :
                                              ( ~ ( ( in @ X3 @ X1 )
                                                 => ~ ( in @ X4 @ X1 ) )
                                             => ( ! [X5: $i] :
                                                    ( ( in @ X5 @ X2 )
                                                   => ( ( in @ X3 @ X5 )
                                                      = ( in @ X4 @ X5 ) ) )
                                               => ( X3 = X4 ) ) ) )
                                   => ~ ! [X3: $i,X4: $i] :
                                          ( ~ ( ( in @ X3 @ X2 )
                                             => ~ ( in @ X4 @ X2 ) )
                                         => ( ~ ! [X5: $i] :
                                                  ( ( in @ X5 @ X3 )
                                                 => ( in @ X5 @ X4 ) )
                                           => ! [X5: $i] :
                                                ( ( in @ X5 @ X4 )
                                               => ( in @ X5 @ X3 ) ) ) ) )
                               => ~ ! [X3: $i] :
                                      ( ~ ( ! [X4: $i] :
                                              ( ( in @ X4 @ X3 )
                                             => ( in @ X4 @ X1 ) )
                                         => ! [X4: $i] :
                                              ~ ( in @ X4 @ X3 ) )
                                     => ~ ! [X4: $i,X5: $i] :
                                            ( ~ ( ~ ( ( in @ X4 @ X2 )
                                                   => ~ ( in @ X5 @ X3 ) )
                                               => ~ ! [X6: $i] :
                                                      ( ( in @ X6 @ X4 )
                                                     => ~ ( in @ X6 @ X3 ) ) )
                                           => ~ ! [X6: $i] :
                                                  ( ( in @ X6 @ X2 )
                                                 => ( ~ ! [X7: $i] :
                                                          ( ( in @ X7 @ X6 )
                                                         => ( in @ X7 @ X4 ) )
                                                   => ( in @ X5 @ X6 ) ) ) ) ) )
                       => ( ! [X1: $i > $o] :
                              ( ~ ! [X2: $i] :
                                    ( ( X1 @ X2 )
                                   => ~ ! [X3: $i] :
                                          ( ( X1 @ X3 )
                                         => ( X2 = X3 ) ) )
                             => ( X1 @ ( descr @ X1 ) ) )
                         => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                                ( ( in @ X3 @ X1 )
                               => ( ( X2 @ X3 )
                                 => ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) ) ) )
                           => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                                  ( ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) )
                                 => ( in @ X3 @ X1 ) )
                             => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                                    ( ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) )
                                   => ( X2 @ X3 ) )
                               => ( ! [X1: $i > $o] :
                                      ( ~ ! [X2: $i] :
                                            ( ( X1 @ X2 )
                                           => ~ ! [X3: $i] :
                                                  ( ( X1 @ X3 )
                                                 => ( X2 = X3 ) ) )
                                     => ~ ! [X2: $i] :
                                            ( ( X1 @ X2 )
                                           => ~ ! [X3: $i] :
                                                  ( ( X1 @ X3 )
                                                 => ( X2 = X3 ) ) ) )
                                 => ( ! [X1: $o,X2: $i] :
                                        ( ( in @ X2 @ ( prop2set @ X1 ) )
                                       => X1 )
                                   => ( ! [X1: $i] :
                                          ( ( in @ X1 @ emptyset )
                                         => ! [X2: $o] : X2 )
                                     => ( ! [X1: $i] :
                                            ~ ( in @ X1 @ emptyset )
                                       => ( ! [X1: $i] :
                                              ~ ( in @ X1 @ emptyset )
                                         => ( ! [X1: $i > $o] :
                                                ( ~ ! [X2: $i] :
                                                      ( ( X1 @ X2 )
                                                     => ~ ! [X3: $i] :
                                                            ( ( X1 @ X3 )
                                                           => ( X2 = X3 ) ) )
                                               => ~ ! [X2: $i] :
                                                      ~ ( X1 @ X2 ) )
                                           => ( ! [X1: $i,X2: $i] :
                                                  ( ! [X3: $i] :
                                                      ( ( in @ X3 @ X1 )
                                                     => ( in @ X3 @ X2 ) )
                                                 => ( ! [X3: $i] :
                                                        ( ( in @ X3 @ X2 )
                                                       => ( in @ X3 @ X1 ) )
                                                   => ( X1 = X2 ) ) )
                                             => ( ! [X1: $i] :
                                                    ( ! [X2: $i] :
                                                        ~ ( in @ X2 @ X1 )
                                                   => ( X1 = emptyset ) )
                                               => ( ! [X1: $i] :
                                                      ( ! [X2: $i] :
                                                          ~ ( in @ X2 @ X1 )
                                                     => ( X1 = emptyset ) )
                                                 => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                                                        ( ( in @ X3 @ X1 )
                                                       => ( ( in @ X3 @ ( dsetconstr @ X1 @ X2 ) )
                                                          = ( X2 @ X3 ) ) )
                                                   => ( ! [X1: $i] :
                                                          ( ( X1 != emptyset )
                                                         => ~ ! [X2: $i] :
                                                                ~ ( in @ X2 @ X1 ) )
                                                     => ( ! [X1: $i,X2: $i > $o,X3: $i] :
                                                            ( ( in @ X3 @ X1 )
                                                           => ( ( X2 @ X3 )
                                                             => ( ( dsetconstr @ X1 @ X2 )
                                                               != emptyset ) ) )
                                                       => ( ! [X1: $i] :
                                                              ( ~ ! [X2: $i] :
                                                                    ~ ( in @ X2 @ X1 )
                                                             => ( X1 != emptyset ) )
                                                         => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ X2 ) )
                                                           => ( ( in @ emptyset @ ( setadjoin @ emptyset @ emptyset ) )
                                                             => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                    ( ( in @ X3 @ X2 )
                                                                   => ( in @ X3 @ ( setadjoin @ X1 @ X2 ) ) )
                                                               => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                      ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
                                                                     => ! [X4: $o] :
                                                                          ( ( ( X3 = X1 )
                                                                           => X4 )
                                                                         => ( ( ( in @ X3 @ X2 )
                                                                             => X4 )
                                                                           => X4 ) ) )
                                                                 => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                        ( ( in @ X3 @ ( setadjoin @ X1 @ X2 ) )
                                                                       => ( ( X3 != X1 )
                                                                         => ( in @ X3 @ X2 ) ) )
                                                                   => ( ! [X1: $i] :
                                                                          ( ( dsetconstr @ X1
                                                                            @ ^ [X2: $i] : ~ $false )
                                                                          = X1 )
                                                                     => ( ! [X1: $i,X2: $i] :
                                                                            ( ! [X3: $i] :
                                                                                ( ( in @ X3 @ X2 )
                                                                               => ( in @ X3 @ X1 ) )
                                                                           => ( in @ X2 @ ( powerset @ X1 ) ) )
                                                                       => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
                                                                         => ( ! [X1: $i] : ( in @ emptyset @ ( powerset @ X1 ) )
                                                                           => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                                  ( ( in @ X2 @ ( powerset @ X1 ) )
                                                                                 => ( ( in @ X3 @ X2 )
                                                                                   => ( in @ X3 @ X1 ) ) )
                                                                             => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                                    ( ( in @ X2 @ X3 )
                                                                                   => ( ( in @ X3 @ X1 )
                                                                                     => ( in @ X2 @ ( setunion @ X1 ) ) ) )
                                                                               => ( ! [X1: $i,X2: $i] :
                                                                                      ( ( in @ X2 @ ( setunion @ X1 ) )
                                                                                     => ! [X3: $o] :
                                                                                          ( ! [X4: $i] :
                                                                                              ( ( in @ X2 @ X4 )
                                                                                             => ( ( in @ X4 @ X1 )
                                                                                               => X3 ) )
                                                                                         => X3 ) )
                                                                                 => ( ! [X1: $i,X2: $i] :
                                                                                        ( ( in @ X2 @ X1 )
                                                                                       => ( in @ X2 @ ( powerset @ ( setunion @ X1 ) ) ) )
                                                                                   => ( ! [X1: $i > $o] :
                                                                                          ( ~ ! [X2: $i] :
                                                                                                ( ( X1 @ X2 )
                                                                                               => ~ ! [X3: $i] :
                                                                                                      ( ( X1 @ X3 )
                                                                                                     => ( X2 = X3 ) ) )
                                                                                         => ~ ! [X2: $i] :
                                                                                                ~ ! [X3: $i] :
                                                                                                    ( ( X1 @ X3 )
                                                                                                    = ( X3 = X2 ) ) )
                                                                                     => ( ! [X1: $i] :
                                                                                            ( ( X1 != emptyset )
                                                                                           => ~ ! [X2: $i] :
                                                                                                  ~ ( in @ X2 @ X1 ) )
                                                                                       => ( ! [X1: $i,X2: $i] :
                                                                                              ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                                                                             => ( X1 = X2 ) )
                                                                                         => ( ! [X1: $i,X2: $i] :
                                                                                                ( ( X1 != X2 )
                                                                                               => ~ ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                                                                                           => ( ! [X1: $i,X2: $i] :
                                                                                                  ( ( X1 = X2 )
                                                                                                 => ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                                             => ( ! [X1: $i,X2: $i] :
                                                                                                    ( ( in @ X1 @ ( setadjoin @ X2 @ emptyset ) )
                                                                                                   => ( in @ X2 @ ( setadjoin @ X1 @ emptyset ) ) )
                                                                                               => ( ! [X1: $i,X2: $i,X3: $i] :
                                                                                                      ( ( in @ X3 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                                                     => ( ( X3 != X1 )
                                                                                                       => ( X3 = X2 ) ) )
                                                                                                 => ( ! [X1: $i,X2: $i] : ( in @ X1 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                                                   => ( ! [X1: $i,X2: $i] : ( in @ X2 @ ( setadjoin @ X1 @ ( setadjoin @ X2 @ emptyset ) ) )
                                                                                                     => ( ! [X1: $i,X2: $i > $o] :
                                                                                                            ( ~ ! [X3: $i] :
                                                                                                                  ( ( in @ X3 @ X1 )
                                                                                                                 => ~ ( X2 @ X3 ) )
                                                                                                           => ( ( dsetconstr @ X1 @ X2 )
                                                                                                             != emptyset ) )
                                                                                                       => ( ! [X1: $i > $o,X2: $i] :
                                                                                                              ( ( in @ X2 @ emptyset )
                                                                                                             => ( X1 @ X2 ) )
                                                                                                         => ( ! [X1: $i,X2: $i > $o] :
                                                                                                                ( ~ ! [X3: $i] :
                                                                                                                      ( ( in @ X3 @ X1 )
                                                                                                                     => ( X2 @ X3 ) )
                                                                                                               => ~ ! [X3: $i] :
                                                                                                                      ( ( in @ X3 @ X1 )
                                                                                                                     => ( X2 @ X3 ) ) )
                                                                                                           => ( ! [X1: $i,X2: $i > $o] :
                                                                                                                  ( ! [X3: $i] :
                                                                                                                      ( ( in @ X3 @ X1 )
                                                                                                                     => ~ ( X2 @ X3 ) )
                                                                                                                 => ! [X3: $i] :
                                                                                                                      ( ( in @ X3 @ X1 )
                                                                                                                     => ~ ( X2 @ X3 ) ) )
                                                                                                             => ( ! [X1: $i,X2: $i > $o] :
                                                                                                                    ( ! [X3: $i] :
                                                                                                                        ( ( in @ X3 @ X1 )
                                                                                                                       => ~ ( X2 @ X3 ) )
                                                                                                                   => ! [X3: $i] :
                                                                                                                        ( ( in @ X3 @ X1 )
                                                                                                                       => ~ ( X2 @ X3 ) ) )
                                                                                                               => ( ! [X1: $i,X2: $i > $o] :
                                                                                                                      ( ~ ! [X3: $i] :
                                                                                                                            ( ( in @ X3 @ X1 )
                                                                                                                           => ( X2 @ X3 ) )
                                                                                                                     => ~ ! [X3: $i] :
                                                                                                                            ( ( in @ X3 @ X1 )
                                                                                                                           => ( X2 @ X3 ) ) )
                                                                                                                 => ( ! [X1: $o] :
                                                                                                                        ( X1
                                                                                                                       => ( in @ emptyset @ ( prop2set @ X1 ) ) )
                                                                                                                   => ( ! [X1: $o] :
                                                                                                                          ( X1
                                                                                                                         => ( set2prop @ ( prop2set @ X1 ) ) )
                                                                                                                     => ( ! [X1: $i,X2: $i > $o] :
                                                                                                                            ( ! [X3: $i] :
                                                                                                                                ( ( in @ X3 @ X1 )
                                                                                                                               => ~ ( X2 @ X3 ) )
                                                                                                                           => ! [X3: $i] :
                                                                                                                                ( ( in @ X3 @ X1 )
                                                                                                                               => ~ ( X2 @ X3 ) ) )
                                                                                                                       => ( ! [X1: $i,X2: $i > $o] :
                                                                                                                              ( ~ ! [X3: $i] :
                                                                                                                                    ( ( in @ X3 @ X1 )
                                                                                                                                   => ( X2 @ X3 ) )
                                                                                                                             => ~ ! [X3: $i] :
                                                                                                                                    ( ( in @ X3 @ X1 )
                                                                                                                                   => ( X2 @ X3 ) ) )
                                                                                                                         => ( ! [X1: $i > $o] :
                                                                                                                                ( ~ ! [X2: $i] :
                                                                                                                                      ( ( X1 @ X2 )
                                                                                                                                     => ~ ! [X3: $i] :
                                                                                                                                            ( ( X1 @ X3 )
                                                                                                                                           => ( X2 = X3 ) ) )
                                                                                                                               => ~ ! [X2: $i] :
                                                                                                                                      ( ( X1 @ X2 )
                                                                                                                                     => ~ ! [X3: $i] :
                                                                                                                                            ( ( X1 @ X3 )
                                                                                                                                           => ( X2 = X3 ) ) ) )
                                                                                                                           => ( ! [X1: $i > $o] :
                                                                                                                                  ( ~ ! [X2: $i] :
                                                                                                                                        ~ ( X1 @ X2 )
                                                                                                                                 => ( ! [X2: $i,X3: $i] :
                                                                                                                                        ( ( X1 @ X2 )
                                                                                                                                       => ( ( X1 @ X3 )
                                                                                                                                         => ( X2 = X3 ) ) )
                                                                                                                                   => ~ ! [X2: $i] :
                                                                                                                                          ( ( X1 @ X2 )
                                                                                                                                         => ~ ! [X3: $i] :
                                                                                                                                                ( ( X1 @ X3 )
                                                                                                                                               => ( X2 = X3 ) ) ) ) )
                                                                                                                             => ! [X1: $i > $o] :
                                                                                                                                  ( ~ ! [X2: $i] :
                                                                                                                                        ~ ! [X3: $i] :
                                                                                                                                            ( ( X1 @ X3 )
                                                                                                                                            = ( X3 = X2 ) )
                                                                                                                                 => ~ ! [X2: $i] :
                                                                                                                                        ( ( X1 @ X2 )
                                                                                                                                       => ~ ! [X3: $i] :
                                                                                                                                              ( ( X1 @ X3 )
                                                                                                                                             => ( X2 = X3 ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ),
    inference(contra,[status(thm),contra(discharge,[h1])],[80,h1]) ).

%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.04/0.13  % Problem  : SEU546^1 : TPTP v8.1.0. Released v3.7.0.
% 0.14/0.14  % Command  : satallax -E eprover-ho -P picomus -M modes -p tstp -t %d %s
% 0.14/0.35  % Computer : n006.cluster.edu
% 0.14/0.35  % Model    : x86_64 x86_64
% 0.14/0.35  % CPU      : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.14/0.35  % Memory   : 8042.1875MB
% 0.14/0.35  % OS       : Linux 3.10.0-693.el7.x86_64
% 0.14/0.35  % CPULimit : 300
% 0.14/0.35  % WCLimit  : 600
% 0.14/0.35  % DateTime : Sun Jun 19 19:43:40 EDT 2022
% 0.14/0.35  % CPUTime  : 
% 187.84/187.82  % SZS status Theorem
% 187.84/187.82  % Mode: mode86:USE_SINE=true:SINE_TOLERANCE=2.0:SINE_GENERALITY_THRESHOLD=4:SINE_RANK_LIMIT=3.:SINE_DEPTH=0
% 187.84/187.82  % Inferences: 573
% 187.84/187.82  % SZS output start Proof
% See solution above
%------------------------------------------------------------------------------