TSTP Solution File: LCL108-1 by Bliksem---1.12

View Problem - Process Solution

%------------------------------------------------------------------------------
% File     : Bliksem---1.12
% Problem  : LCL108-1 : TPTP v8.1.0. Released v1.0.0.
% Transfm  : none
% Format   : tptp:raw
% Command  : bliksem %s

% Computer : n019.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  : 0s
% DateTime : Sun Jul 17 07:50:25 EDT 2022

% Result   : Unsatisfiable 0.40s 1.07s
% Output   : Refutation 0.40s
% Verified : 
% SZS Type : -

% Comments : 
%------------------------------------------------------------------------------
%----WARNING: Could not form TPTP format derivation
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.03/0.11  % Problem  : LCL108-1 : TPTP v8.1.0. Released v1.0.0.
% 0.03/0.11  % Command  : bliksem %s
% 0.11/0.32  % Computer : n019.cluster.edu
% 0.11/0.32  % Model    : x86_64 x86_64
% 0.11/0.32  % CPU      : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.11/0.32  % Memory   : 8042.1875MB
% 0.11/0.32  % OS       : Linux 3.10.0-693.el7.x86_64
% 0.11/0.32  % CPULimit : 300
% 0.11/0.32  % DateTime : Mon Jul  4 07:30:23 EDT 2022
% 0.11/0.32  % CPUTime  : 
% 0.40/1.07  *** allocated 10000 integers for termspace/termends
% 0.40/1.07  *** allocated 10000 integers for clauses
% 0.40/1.07  *** allocated 10000 integers for justifications
% 0.40/1.07  Bliksem 1.12
% 0.40/1.07  
% 0.40/1.07  
% 0.40/1.07  Automatic Strategy Selection
% 0.40/1.07  
% 0.40/1.07  Clauses:
% 0.40/1.07  [
% 0.40/1.07     [ ~( 'is_a_theorem'( equivalent( X, Y ) ) ), ~( 'is_a_theorem'( X ) ), 
% 0.40/1.07    'is_a_theorem'( Y ) ],
% 0.40/1.07     [ 'is_a_theorem'( equivalent( equivalent( equivalent( equivalent( X, Y )
% 0.40/1.07    , Z ), equivalent( equivalent( T, U ), equivalent( equivalent( equivalent( 
% 0.40/1.07    W, U ), equivalent( W, T ) ), V0 ) ) ), equivalent( Z, equivalent( 
% 0.40/1.07    equivalent( Y, X ), V0 ) ) ) ) ],
% 0.40/1.07     [ ~( 'is_a_theorem'( equivalent( equivalent( equivalent( a, b ), 
% 0.40/1.07    equivalent( equivalent( b, a ), c ) ), c ) ) ) ]
% 0.40/1.07  ] .
% 0.40/1.07  
% 0.40/1.07  
% 0.40/1.07  percentage equality = 0.000000, percentage horn = 1.000000
% 0.40/1.07  This is a near-Horn, non-equality  problem
% 0.40/1.07  
% 0.40/1.07  
% 0.40/1.07  Options Used:
% 0.40/1.07  
% 0.40/1.07  useres =            1
% 0.40/1.07  useparamod =        0
% 0.40/1.07  useeqrefl =         0
% 0.40/1.07  useeqfact =         0
% 0.40/1.07  usefactor =         1
% 0.40/1.07  usesimpsplitting =  0
% 0.40/1.07  usesimpdemod =      0
% 0.40/1.07  usesimpres =        4
% 0.40/1.07  
% 0.40/1.07  resimpinuse      =  1000
% 0.40/1.07  resimpclauses =     20000
% 0.40/1.07  substype =          standard
% 0.40/1.07  backwardsubs =      1
% 0.40/1.07  selectoldest =      5
% 0.40/1.07  
% 0.40/1.07  litorderings [0] =  split
% 0.40/1.07  litorderings [1] =  liftord
% 0.40/1.07  
% 0.40/1.07  termordering =      none
% 0.40/1.07  
% 0.40/1.07  litapriori =        1
% 0.40/1.07  termapriori =       0
% 0.40/1.07  litaposteriori =    0
% 0.40/1.07  termaposteriori =   0
% 0.40/1.07  demodaposteriori =  0
% 0.40/1.07  ordereqreflfact =   0
% 0.40/1.07  
% 0.40/1.07  litselect =         negative
% 0.40/1.07  
% 0.40/1.07  maxweight =         30000
% 0.40/1.07  maxdepth =          30000
% 0.40/1.07  maxlength =         115
% 0.40/1.07  maxnrvars =         195
% 0.40/1.07  excuselevel =       0
% 0.40/1.07  increasemaxweight = 0
% 0.40/1.07  
% 0.40/1.07  maxselected =       10000000
% 0.40/1.07  maxnrclauses =      10000000
% 0.40/1.07  
% 0.40/1.07  showgenerated =    0
% 0.40/1.07  showkept =         0
% 0.40/1.07  showselected =     0
% 0.40/1.07  showdeleted =      0
% 0.40/1.07  showresimp =       1
% 0.40/1.07  showstatus =       2000
% 0.40/1.07  
% 0.40/1.07  prologoutput =     1
% 0.40/1.07  nrgoals =          5000000
% 0.40/1.07  totalproof =       1
% 0.40/1.07  
% 0.40/1.07  Symbols occurring in the translation:
% 0.40/1.07  
% 0.40/1.07  {}  [0, 0]      (w:1, o:2, a:1, s:1, b:0), 
% 0.40/1.07  .  [1, 2]      (w:1, o:25, a:1, s:1, b:0), 
% 0.40/1.07  !  [4, 1]      (w:1, o:19, a:1, s:1, b:0), 
% 0.40/1.07  =  [13, 2]      (w:1, o:0, a:0, s:1, b:0), 
% 0.40/1.07  ==>  [14, 2]      (w:1, o:0, a:0, s:1, b:0), 
% 0.40/1.07  equivalent  [41, 2]      (w:1, o:50, a:1, s:1, b:0), 
% 0.40/1.07  'is_a_theorem'  [42, 1]      (w:1, o:24, a:1, s:1, b:0), 
% 0.40/1.07  a  [48, 0]      (w:1, o:16, a:1, s:1, b:0), 
% 0.40/1.07  b  [49, 0]      (w:1, o:17, a:1, s:1, b:0), 
% 0.40/1.07  c  [50, 0]      (w:1, o:18, a:1, s:1, b:0).
% 0.40/1.07  
% 0.40/1.07  
% 0.40/1.07  Starting Search:
% 0.40/1.07  
% 0.40/1.07  
% 0.40/1.07  Bliksems!, er is een bewijs:
% 0.40/1.07  % SZS status Unsatisfiable
% 0.40/1.07  % SZS output start Refutation
% 0.40/1.07  
% 0.40/1.07  clause( 0, [ ~( 'is_a_theorem'( equivalent( X, Y ) ) ), 'is_a_theorem'( Y )
% 0.40/1.07    , ~( 'is_a_theorem'( X ) ) ] )
% 0.40/1.07  .
% 0.40/1.07  clause( 1, [ 'is_a_theorem'( equivalent( equivalent( equivalent( equivalent( 
% 0.40/1.07    X, Y ), Z ), equivalent( equivalent( T, U ), equivalent( equivalent( 
% 0.40/1.07    equivalent( W, U ), equivalent( W, T ) ), V0 ) ) ), equivalent( Z, 
% 0.40/1.07    equivalent( equivalent( Y, X ), V0 ) ) ) ) ] )
% 0.40/1.07  .
% 0.40/1.07  clause( 2, [ ~( 'is_a_theorem'( equivalent( equivalent( equivalent( a, b )
% 0.40/1.07    , equivalent( equivalent( b, a ), c ) ), c ) ) ) ] )
% 0.40/1.07  .
% 0.40/1.07  clause( 3, [ 'is_a_theorem'( V1 ), ~( 'is_a_theorem'( equivalent( 
% 0.40/1.07    equivalent( equivalent( equivalent( equivalent( X, Y ), Z ), equivalent( 
% 0.40/1.07    equivalent( T, U ), equivalent( equivalent( equivalent( W, U ), 
% 0.40/1.07    equivalent( W, T ) ), V0 ) ) ), equivalent( Z, equivalent( equivalent( Y
% 0.40/1.07    , X ), V0 ) ) ), V1 ) ) ) ] )
% 0.40/1.07  .
% 0.40/1.07  clause( 4, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, Y ), 
% 0.40/1.07    equivalent( equivalent( equivalent( Z, Y ), equivalent( Z, X ) ), T ) ), 
% 0.40/1.07    equivalent( equivalent( equivalent( U, W ), equivalent( equivalent( V0, U
% 0.40/1.07     ), equivalent( V0, W ) ) ), T ) ) ) ] )
% 0.40/1.07  .
% 0.40/1.07  clause( 5, [ 'is_a_theorem'( V1 ), ~( 'is_a_theorem'( equivalent( 
% 0.40/1.07    equivalent( equivalent( equivalent( X, Y ), equivalent( equivalent( 
% 0.40/1.07    equivalent( Z, Y ), equivalent( Z, X ) ), T ) ), equivalent( equivalent( 
% 0.40/1.07    equivalent( U, W ), equivalent( equivalent( V0, U ), equivalent( V0, W )
% 0.40/1.07     ) ), T ) ), V1 ) ) ) ] )
% 0.40/1.07  .
% 0.40/1.07  clause( 6, [ 'is_a_theorem'( equivalent( equivalent( equivalent( equivalent( 
% 0.40/1.07    X, Y ), equivalent( X, Z ) ), equivalent( equivalent( equivalent( T, 
% 0.40/1.07    equivalent( equivalent( U, W ), equivalent( U, V0 ) ) ), equivalent( T, 
% 0.40/1.07    equivalent( W, V0 ) ) ), V1 ) ), equivalent( equivalent( Y, Z ), V1 ) ) )
% 0.40/1.07     ] )
% 0.40/1.07  .
% 0.40/1.07  clause( 7, [ 'is_a_theorem'( equivalent( equivalent( equivalent( equivalent( 
% 0.40/1.07    X, equivalent( equivalent( Y, Z ), equivalent( Y, T ) ) ), equivalent( X
% 0.40/1.07    , equivalent( Z, T ) ) ), equivalent( equivalent( equivalent( U, W ), 
% 0.40/1.07    equivalent( U, V0 ) ), V1 ) ), equivalent( equivalent( W, V0 ), V1 ) ) )
% 0.40/1.07     ] )
% 0.40/1.07  .
% 0.40/1.07  clause( 8, [ 'is_a_theorem'( V2 ), ~( 'is_a_theorem'( equivalent( 
% 0.40/1.07    equivalent( equivalent( equivalent( equivalent( X, Y ), equivalent( X, Z
% 0.40/1.07     ) ), equivalent( equivalent( equivalent( T, equivalent( equivalent( U, W
% 0.40/1.07     ), equivalent( U, V0 ) ) ), equivalent( T, equivalent( W, V0 ) ) ), V1 )
% 0.40/1.07     ), equivalent( equivalent( Y, Z ), V1 ) ), V2 ) ) ) ] )
% 0.40/1.07  .
% 0.40/1.07  clause( 17, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, Y ), Z
% 0.40/1.07     ), equivalent( equivalent( equivalent( T, X ), equivalent( T, Y ) ), Z )
% 0.40/1.07     ) ) ] )
% 0.40/1.07  .
% 0.40/1.07  clause( 23, [ 'is_a_theorem'( U ), ~( 'is_a_theorem'( equivalent( 
% 0.40/1.07    equivalent( equivalent( equivalent( X, Y ), Z ), equivalent( equivalent( 
% 0.40/1.07    equivalent( T, X ), equivalent( T, Y ) ), Z ) ), U ) ) ) ] )
% 0.40/1.07  .
% 0.40/1.07  clause( 27, [ 'is_a_theorem'( equivalent( equivalent( X, equivalent( 
% 0.40/1.07    equivalent( Y, Z ), equivalent( Y, T ) ) ), equivalent( X, equivalent( Z
% 0.40/1.07    , T ) ) ) ) ] )
% 0.40/1.07  .
% 0.40/1.07  clause( 28, [ 'is_a_theorem'( equivalent( equivalent( equivalent( 
% 0.40/1.07    equivalent( X, equivalent( Y, Z ) ), equivalent( X, equivalent( Y, T ) )
% 0.40/1.07     ), U ), equivalent( equivalent( Z, T ), U ) ) ) ] )
% 0.40/1.07  .
% 0.40/1.07  clause( 42, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, Y ), 
% 0.40/1.07    equivalent( equivalent( Z, X ), T ) ), equivalent( equivalent( Z, Y ), T
% 0.40/1.07     ) ) ) ] )
% 0.40/1.07  .
% 0.40/1.07  clause( 46, [ 'is_a_theorem'( U ), ~( 'is_a_theorem'( equivalent( 
% 0.40/1.07    equivalent( equivalent( X, equivalent( equivalent( Y, Z ), equivalent( Y
% 0.40/1.07    , T ) ) ), equivalent( X, equivalent( Z, T ) ) ), U ) ) ) ] )
% 0.40/1.07  .
% 0.40/1.07  clause( 48, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, X ), Y
% 0.40/1.07     ), Y ) ) ] )
% 0.40/1.07  .
% 0.40/1.07  clause( 54, [ 'is_a_theorem'( Z ), ~( 'is_a_theorem'( equivalent( 
% 0.40/1.07    equivalent( equivalent( equivalent( X, X ), Y ), Y ), Z ) ) ) ] )
% 0.40/1.07  .
% 0.40/1.07  clause( 72, [ 'is_a_theorem'( equivalent( X, X ) ) ] )
% 0.40/1.07  .
% 0.40/1.07  clause( 79, [ 'is_a_theorem'( Y ), ~( 'is_a_theorem'( equivalent( 
% 0.40/1.07    equivalent( X, X ), Y ) ) ) ] )
% 0.40/1.07  .
% 0.40/1.07  clause( 301, [ 'is_a_theorem'( equivalent( equivalent( X, Y ), equivalent( 
% 0.40/1.07    equivalent( Z, equivalent( T, X ) ), equivalent( Z, equivalent( T, Y ) )
% 0.40/1.07     ) ) ) ] )
% 0.40/1.07  .
% 0.40/1.07  clause( 309, [ 'is_a_theorem'( equivalent( equivalent( X, equivalent( Y, 
% 0.40/1.07    equivalent( equivalent( Z, Z ), T ) ) ), equivalent( X, equivalent( Y, T
% 0.40/1.07     ) ) ) ) ] )
% 0.40/1.07  .
% 0.40/1.07  clause( 695, [ 'is_a_theorem'( equivalent( equivalent( X, equivalent( 
% 0.40/1.07    equivalent( Y, equivalent( Z, Z ) ), equivalent( Y, T ) ) ), equivalent( 
% 0.40/1.07    X, T ) ) ) ] )
% 0.40/1.07  .
% 0.40/1.07  clause( 725, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, Y ), 
% 0.40/1.07    equivalent( equivalent( Y, X ), Z ) ), Z ) ) ] )
% 0.40/1.07  .
% 0.40/1.07  clause( 730, [] )
% 0.40/1.07  .
% 0.40/1.07  
% 0.40/1.07  
% 0.40/1.07  % SZS output end Refutation
% 0.40/1.07  found a proof!
% 0.40/1.07  
% 0.40/1.07  % ABCDEFGHIJKLMNOPQRSTUVWXYZ
% 0.40/1.07  
% 0.40/1.07  initialclauses(
% 0.40/1.07  [ clause( 732, [ ~( 'is_a_theorem'( equivalent( X, Y ) ) ), ~( 
% 0.40/1.07    'is_a_theorem'( X ) ), 'is_a_theorem'( Y ) ] )
% 0.40/1.07  , clause( 733, [ 'is_a_theorem'( equivalent( equivalent( equivalent( 
% 0.40/1.07    equivalent( X, Y ), Z ), equivalent( equivalent( T, U ), equivalent( 
% 0.40/1.07    equivalent( equivalent( W, U ), equivalent( W, T ) ), V0 ) ) ), 
% 0.40/1.07    equivalent( Z, equivalent( equivalent( Y, X ), V0 ) ) ) ) ] )
% 0.40/1.07  , clause( 734, [ ~( 'is_a_theorem'( equivalent( equivalent( equivalent( a, 
% 0.40/1.07    b ), equivalent( equivalent( b, a ), c ) ), c ) ) ) ] )
% 0.40/1.07  ] ).
% 0.40/1.07  
% 0.40/1.07  
% 0.40/1.07  
% 0.40/1.07  subsumption(
% 0.40/1.07  clause( 0, [ ~( 'is_a_theorem'( equivalent( X, Y ) ) ), 'is_a_theorem'( Y )
% 0.40/1.07    , ~( 'is_a_theorem'( X ) ) ] )
% 0.40/1.07  , clause( 732, [ ~( 'is_a_theorem'( equivalent( X, Y ) ) ), ~( 
% 0.40/1.07    'is_a_theorem'( X ) ), 'is_a_theorem'( Y ) ] )
% 0.40/1.07  , substitution( 0, [ :=( X, X ), :=( Y, Y )] ), permutation( 0, [ ==>( 0, 0
% 0.40/1.07     ), ==>( 1, 2 ), ==>( 2, 1 )] ) ).
% 0.40/1.07  
% 0.40/1.07  
% 0.40/1.07  subsumption(
% 0.40/1.07  clause( 1, [ 'is_a_theorem'( equivalent( equivalent( equivalent( equivalent( 
% 0.40/1.07    X, Y ), Z ), equivalent( equivalent( T, U ), equivalent( equivalent( 
% 0.40/1.07    equivalent( W, U ), equivalent( W, T ) ), V0 ) ) ), equivalent( Z, 
% 0.40/1.07    equivalent( equivalent( Y, X ), V0 ) ) ) ) ] )
% 0.40/1.07  , clause( 733, [ 'is_a_theorem'( equivalent( equivalent( equivalent( 
% 0.40/1.07    equivalent( X, Y ), Z ), equivalent( equivalent( T, U ), equivalent( 
% 0.40/1.07    equivalent( equivalent( W, U ), equivalent( W, T ) ), V0 ) ) ), 
% 0.40/1.07    equivalent( Z, equivalent( equivalent( Y, X ), V0 ) ) ) ) ] )
% 0.40/1.07  , substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z ), :=( T, T ), :=( U
% 0.40/1.07    , U ), :=( W, W ), :=( V0, V0 )] ), permutation( 0, [ ==>( 0, 0 )] )
% 0.40/1.07     ).
% 0.40/1.07  
% 0.40/1.07  
% 0.40/1.07  subsumption(
% 0.40/1.07  clause( 2, [ ~( 'is_a_theorem'( equivalent( equivalent( equivalent( a, b )
% 0.40/1.07    , equivalent( equivalent( b, a ), c ) ), c ) ) ) ] )
% 0.40/1.07  , clause( 734, [ ~( 'is_a_theorem'( equivalent( equivalent( equivalent( a, 
% 0.40/1.07    b ), equivalent( equivalent( b, a ), c ) ), c ) ) ) ] )
% 0.40/1.07  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 0 )] ) ).
% 0.40/1.07  
% 0.40/1.07  
% 0.40/1.07  resolution(
% 0.40/1.07  clause( 736, [ ~( 'is_a_theorem'( equivalent( equivalent( equivalent( 
% 0.40/1.07    equivalent( equivalent( X, Y ), Z ), equivalent( equivalent( T, U ), 
% 0.40/1.07    equivalent( equivalent( equivalent( W, U ), equivalent( W, T ) ), V0 ) )
% 0.40/1.07     ), equivalent( Z, equivalent( equivalent( Y, X ), V0 ) ) ), V1 ) ) ), 
% 0.40/1.07    'is_a_theorem'( V1 ) ] )
% 0.40/1.07  , clause( 0, [ ~( 'is_a_theorem'( equivalent( X, Y ) ) ), 'is_a_theorem'( Y
% 0.40/1.07     ), ~( 'is_a_theorem'( X ) ) ] )
% 0.40/1.07  , 2, clause( 1, [ 'is_a_theorem'( equivalent( equivalent( equivalent( 
% 0.40/1.07    equivalent( X, Y ), Z ), equivalent( equivalent( T, U ), equivalent( 
% 0.40/1.07    equivalent( equivalent( W, U ), equivalent( W, T ) ), V0 ) ) ), 
% 0.40/1.07    equivalent( Z, equivalent( equivalent( Y, X ), V0 ) ) ) ) ] )
% 0.40/1.07  , 0, substitution( 0, [ :=( X, equivalent( equivalent( equivalent( 
% 0.40/1.07    equivalent( X, Y ), Z ), equivalent( equivalent( T, U ), equivalent( 
% 0.40/1.07    equivalent( equivalent( W, U ), equivalent( W, T ) ), V0 ) ) ), 
% 0.40/1.07    equivalent( Z, equivalent( equivalent( Y, X ), V0 ) ) ) ), :=( Y, V1 )] )
% 0.40/1.07    , substitution( 1, [ :=( X, X ), :=( Y, Y ), :=( Z, Z ), :=( T, T ), :=( 
% 0.40/1.07    U, U ), :=( W, W ), :=( V0, V0 )] )).
% 0.40/1.07  
% 0.40/1.07  
% 0.40/1.07  subsumption(
% 0.40/1.07  clause( 3, [ 'is_a_theorem'( V1 ), ~( 'is_a_theorem'( equivalent( 
% 0.40/1.07    equivalent( equivalent( equivalent( equivalent( X, Y ), Z ), equivalent( 
% 0.40/1.07    equivalent( T, U ), equivalent( equivalent( equivalent( W, U ), 
% 0.40/1.07    equivalent( W, T ) ), V0 ) ) ), equivalent( Z, equivalent( equivalent( Y
% 0.40/1.07    , X ), V0 ) ) ), V1 ) ) ) ] )
% 0.40/1.07  , clause( 736, [ ~( 'is_a_theorem'( equivalent( equivalent( equivalent( 
% 0.40/1.07    equivalent( equivalent( X, Y ), Z ), equivalent( equivalent( T, U ), 
% 0.40/1.07    equivalent( equivalent( equivalent( W, U ), equivalent( W, T ) ), V0 ) )
% 0.40/1.07     ), equivalent( Z, equivalent( equivalent( Y, X ), V0 ) ) ), V1 ) ) ), 
% 0.40/1.07    'is_a_theorem'( V1 ) ] )
% 0.40/1.07  , substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z ), :=( T, T ), :=( U
% 0.40/1.07    , U ), :=( W, W ), :=( V0, V0 ), :=( V1, V1 )] ), permutation( 0, [ ==>( 
% 0.40/1.07    0, 1 ), ==>( 1, 0 )] ) ).
% 0.40/1.07  
% 0.40/1.07  
% 0.40/1.07  resolution(
% 0.40/1.07  clause( 737, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, Y ), 
% 0.40/1.07    equivalent( equivalent( equivalent( Z, Y ), equivalent( Z, X ) ), T ) ), 
% 0.40/1.07    equivalent( equivalent( equivalent( U, W ), equivalent( equivalent( V0, U
% 0.40/1.07     ), equivalent( V0, W ) ) ), T ) ) ) ] )
% 0.40/1.07  , clause( 3, [ 'is_a_theorem'( V1 ), ~( 'is_a_theorem'( equivalent( 
% 0.40/1.07    equivalent( equivalent( equivalent( equivalent( X, Y ), Z ), equivalent( 
% 0.40/1.07    equivalent( T, U ), equivalent( equivalent( equivalent( W, U ), 
% 0.40/1.07    equivalent( W, T ) ), V0 ) ) ), equivalent( Z, equivalent( equivalent( Y
% 0.40/1.07    , X ), V0 ) ) ), V1 ) ) ) ] )
% 0.40/1.07  , 1, clause( 1, [ 'is_a_theorem'( equivalent( equivalent( equivalent( 
% 0.40/1.07    equivalent( X, Y ), Z ), equivalent( equivalent( T, U ), equivalent( 
% 0.40/1.07    equivalent( equivalent( W, U ), equivalent( W, T ) ), V0 ) ) ), 
% 0.40/1.07    equivalent( Z, equivalent( equivalent( Y, X ), V0 ) ) ) ) ] )
% 0.40/1.07  , 0, substitution( 0, [ :=( X, equivalent( V0, U ) ), :=( Y, equivalent( V0
% 0.40/1.07    , W ) ), :=( Z, equivalent( U, W ) ), :=( T, X ), :=( U, Y ), :=( W, Z )
% 0.40/1.07    , :=( V0, T ), :=( V1, equivalent( equivalent( equivalent( X, Y ), 
% 0.40/1.07    equivalent( equivalent( equivalent( Z, Y ), equivalent( Z, X ) ), T ) ), 
% 0.40/1.07    equivalent( equivalent( equivalent( U, W ), equivalent( equivalent( V0, U
% 0.40/1.07     ), equivalent( V0, W ) ) ), T ) ) )] ), substitution( 1, [ :=( X, 
% 0.40/1.07    equivalent( equivalent( V0, U ), equivalent( V0, W ) ) ), :=( Y, 
% 0.40/1.07    equivalent( U, W ) ), :=( Z, equivalent( equivalent( X, Y ), equivalent( 
% 0.40/1.07    equivalent( equivalent( Z, Y ), equivalent( Z, X ) ), T ) ) ), :=( T, U )
% 0.40/1.07    , :=( U, W ), :=( W, V0 ), :=( V0, T )] )).
% 0.40/1.07  
% 0.40/1.07  
% 0.40/1.07  subsumption(
% 0.40/1.07  clause( 4, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, Y ), 
% 0.40/1.07    equivalent( equivalent( equivalent( Z, Y ), equivalent( Z, X ) ), T ) ), 
% 0.40/1.07    equivalent( equivalent( equivalent( U, W ), equivalent( equivalent( V0, U
% 0.40/1.07     ), equivalent( V0, W ) ) ), T ) ) ) ] )
% 0.40/1.07  , clause( 737, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, Y )
% 0.40/1.07    , equivalent( equivalent( equivalent( Z, Y ), equivalent( Z, X ) ), T ) )
% 0.40/1.07    , equivalent( equivalent( equivalent( U, W ), equivalent( equivalent( V0
% 0.40/1.07    , U ), equivalent( V0, W ) ) ), T ) ) ) ] )
% 0.40/1.07  , substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z ), :=( T, T ), :=( U
% 0.40/1.07    , U ), :=( W, W ), :=( V0, V0 )] ), permutation( 0, [ ==>( 0, 0 )] )
% 0.40/1.07     ).
% 0.40/1.07  
% 0.40/1.07  
% 0.40/1.07  resolution(
% 0.40/1.07  clause( 739, [ ~( 'is_a_theorem'( equivalent( equivalent( equivalent( 
% 0.40/1.07    equivalent( X, Y ), equivalent( equivalent( equivalent( Z, Y ), 
% 0.40/1.07    equivalent( Z, X ) ), T ) ), equivalent( equivalent( equivalent( U, W ), 
% 0.40/1.07    equivalent( equivalent( V0, U ), equivalent( V0, W ) ) ), T ) ), V1 ) ) )
% 0.40/1.07    , 'is_a_theorem'( V1 ) ] )
% 0.40/1.07  , clause( 0, [ ~( 'is_a_theorem'( equivalent( X, Y ) ) ), 'is_a_theorem'( Y
% 0.40/1.07     ), ~( 'is_a_theorem'( X ) ) ] )
% 0.40/1.07  , 2, clause( 4, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, Y
% 0.40/1.07     ), equivalent( equivalent( equivalent( Z, Y ), equivalent( Z, X ) ), T )
% 0.40/1.07     ), equivalent( equivalent( equivalent( U, W ), equivalent( equivalent( 
% 0.40/1.07    V0, U ), equivalent( V0, W ) ) ), T ) ) ) ] )
% 0.40/1.07  , 0, substitution( 0, [ :=( X, equivalent( equivalent( equivalent( X, Y ), 
% 0.40/1.07    equivalent( equivalent( equivalent( Z, Y ), equivalent( Z, X ) ), T ) ), 
% 0.40/1.07    equivalent( equivalent( equivalent( U, W ), equivalent( equivalent( V0, U
% 0.40/1.07     ), equivalent( V0, W ) ) ), T ) ) ), :=( Y, V1 )] ), substitution( 1, [ 
% 0.40/1.07    :=( X, X ), :=( Y, Y ), :=( Z, Z ), :=( T, T ), :=( U, U ), :=( W, W ), 
% 0.40/1.07    :=( V0, V0 )] )).
% 0.40/1.07  
% 0.40/1.07  
% 0.40/1.07  subsumption(
% 0.40/1.07  clause( 5, [ 'is_a_theorem'( V1 ), ~( 'is_a_theorem'( equivalent( 
% 0.40/1.07    equivalent( equivalent( equivalent( X, Y ), equivalent( equivalent( 
% 0.40/1.07    equivalent( Z, Y ), equivalent( Z, X ) ), T ) ), equivalent( equivalent( 
% 0.40/1.07    equivalent( U, W ), equivalent( equivalent( V0, U ), equivalent( V0, W )
% 0.40/1.07     ) ), T ) ), V1 ) ) ) ] )
% 0.40/1.07  , clause( 739, [ ~( 'is_a_theorem'( equivalent( equivalent( equivalent( 
% 0.40/1.07    equivalent( X, Y ), equivalent( equivalent( equivalent( Z, Y ), 
% 0.40/1.07    equivalent( Z, X ) ), T ) ), equivalent( equivalent( equivalent( U, W ), 
% 0.40/1.07    equivalent( equivalent( V0, U ), equivalent( V0, W ) ) ), T ) ), V1 ) ) )
% 0.40/1.07    , 'is_a_theorem'( V1 ) ] )
% 0.40/1.07  , substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z ), :=( T, T ), :=( U
% 0.40/1.07    , U ), :=( W, W ), :=( V0, V0 ), :=( V1, V1 )] ), permutation( 0, [ ==>( 
% 0.40/1.07    0, 1 ), ==>( 1, 0 )] ) ).
% 0.40/1.07  
% 0.40/1.07  
% 0.40/1.07  resolution(
% 0.40/1.07  clause( 740, [ 'is_a_theorem'( equivalent( equivalent( equivalent( 
% 0.40/1.07    equivalent( X, Y ), equivalent( X, Z ) ), equivalent( equivalent( 
% 0.40/1.07    equivalent( T, equivalent( equivalent( U, W ), equivalent( U, V0 ) ) ), 
% 0.40/1.07    equivalent( T, equivalent( W, V0 ) ) ), V1 ) ), equivalent( equivalent( Y
% 0.40/1.07    , Z ), V1 ) ) ) ] )
% 0.40/1.07  , clause( 5, [ 'is_a_theorem'( V1 ), ~( 'is_a_theorem'( equivalent( 
% 0.40/1.07    equivalent( equivalent( equivalent( X, Y ), equivalent( equivalent( 
% 0.40/1.07    equivalent( Z, Y ), equivalent( Z, X ) ), T ) ), equivalent( equivalent( 
% 0.40/1.07    equivalent( U, W ), equivalent( equivalent( V0, U ), equivalent( V0, W )
% 0.40/1.07     ) ), T ) ), V1 ) ) ) ] )
% 0.40/1.07  , 1, clause( 1, [ 'is_a_theorem'( equivalent( equivalent( equivalent( 
% 0.40/1.07    equivalent( X, Y ), Z ), equivalent( equivalent( T, U ), equivalent( 
% 0.40/1.07    equivalent( equivalent( W, U ), equivalent( W, T ) ), V0 ) ) ), 
% 0.40/1.07    equivalent( Z, equivalent( equivalent( Y, X ), V0 ) ) ) ) ] )
% 0.40/1.07  , 0, substitution( 0, [ :=( X, Z ), :=( Y, Y ), :=( Z, X ), :=( T, 
% 0.40/1.07    equivalent( equivalent( equivalent( T, equivalent( equivalent( U, W ), 
% 0.40/1.07    equivalent( U, V0 ) ) ), equivalent( T, equivalent( W, V0 ) ) ), V1 ) ), 
% 0.40/1.07    :=( U, W ), :=( W, V0 ), :=( V0, U ), :=( V1, equivalent( equivalent( 
% 0.40/1.07    equivalent( equivalent( X, Y ), equivalent( X, Z ) ), equivalent( 
% 0.40/1.07    equivalent( equivalent( T, equivalent( equivalent( U, W ), equivalent( U
% 0.40/1.07    , V0 ) ) ), equivalent( T, equivalent( W, V0 ) ) ), V1 ) ), equivalent( 
% 0.40/1.07    equivalent( Y, Z ), V1 ) ) )] ), substitution( 1, [ :=( X, Z ), :=( Y, Y
% 0.40/1.07     ), :=( Z, equivalent( equivalent( equivalent( X, Y ), equivalent( X, Z )
% 0.40/1.07     ), equivalent( equivalent( equivalent( T, equivalent( equivalent( U, W )
% 0.40/1.07    , equivalent( U, V0 ) ) ), equivalent( T, equivalent( W, V0 ) ) ), V1 ) )
% 0.40/1.07     ), :=( T, equivalent( W, V0 ) ), :=( U, equivalent( equivalent( U, W ), 
% 0.40/1.07    equivalent( U, V0 ) ) ), :=( W, T ), :=( V0, V1 )] )).
% 0.40/1.07  
% 0.40/1.07  
% 0.40/1.07  subsumption(
% 0.40/1.07  clause( 6, [ 'is_a_theorem'( equivalent( equivalent( equivalent( equivalent( 
% 0.40/1.07    X, Y ), equivalent( X, Z ) ), equivalent( equivalent( equivalent( T, 
% 0.40/1.07    equivalent( equivalent( U, W ), equivalent( U, V0 ) ) ), equivalent( T, 
% 0.40/1.07    equivalent( W, V0 ) ) ), V1 ) ), equivalent( equivalent( Y, Z ), V1 ) ) )
% 0.40/1.07     ] )
% 0.40/1.07  , clause( 740, [ 'is_a_theorem'( equivalent( equivalent( equivalent( 
% 0.40/1.07    equivalent( X, Y ), equivalent( X, Z ) ), equivalent( equivalent( 
% 0.40/1.07    equivalent( T, equivalent( equivalent( U, W ), equivalent( U, V0 ) ) ), 
% 0.40/1.07    equivalent( T, equivalent( W, V0 ) ) ), V1 ) ), equivalent( equivalent( Y
% 0.40/1.07    , Z ), V1 ) ) ) ] )
% 0.40/1.07  , substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z ), :=( T, T ), :=( U
% 0.40/1.07    , U ), :=( W, W ), :=( V0, V0 ), :=( V1, V1 )] ), permutation( 0, [ ==>( 
% 0.40/1.07    0, 0 )] ) ).
% 0.40/1.07  
% 0.40/1.07  
% 0.40/1.07  resolution(
% 0.40/1.07  clause( 741, [ 'is_a_theorem'( equivalent( equivalent( equivalent( 
% 0.40/1.07    equivalent( X, equivalent( equivalent( Y, Z ), equivalent( Y, T ) ) ), 
% 0.40/1.07    equivalent( X, equivalent( Z, T ) ) ), equivalent( equivalent( equivalent( 
% 0.40/1.07    U, W ), equivalent( U, V0 ) ), V1 ) ), equivalent( equivalent( W, V0 ), 
% 0.40/1.07    V1 ) ) ) ] )
% 0.40/1.07  , clause( 3, [ 'is_a_theorem'( V1 ), ~( 'is_a_theorem'( equivalent( 
% 0.40/1.07    equivalent( equivalent( equivalent( equivalent( X, Y ), Z ), equivalent( 
% 0.40/1.07    equivalent( T, U ), equivalent( equivalent( equivalent( W, U ), 
% 0.40/1.07    equivalent( W, T ) ), V0 ) ) ), equivalent( Z, equivalent( equivalent( Y
% 0.40/1.07    , X ), V0 ) ) ), V1 ) ) ) ] )
% 0.40/1.07  , 1, clause( 6, [ 'is_a_theorem'( equivalent( equivalent( equivalent( 
% 0.40/1.07    equivalent( X, Y ), equivalent( X, Z ) ), equivalent( equivalent( 
% 0.40/1.07    equivalent( T, equivalent( equivalent( U, W ), equivalent( U, V0 ) ) ), 
% 0.40/1.07    equivalent( T, equivalent( W, V0 ) ) ), V1 ) ), equivalent( equivalent( Y
% 0.40/1.07    , Z ), V1 ) ) ) ] )
% 0.40/1.07  , 0, substitution( 0, [ :=( X, V0 ), :=( Y, W ), :=( Z, equivalent( 
% 0.40/1.07    equivalent( X, equivalent( equivalent( Y, Z ), equivalent( Y, T ) ) ), 
% 0.40/1.07    equivalent( X, equivalent( Z, T ) ) ) ), :=( T, V0 ), :=( U, W ), :=( W, 
% 0.40/1.07    U ), :=( V0, V1 ), :=( V1, equivalent( equivalent( equivalent( equivalent( 
% 0.40/1.07    X, equivalent( equivalent( Y, Z ), equivalent( Y, T ) ) ), equivalent( X
% 0.40/1.07    , equivalent( Z, T ) ) ), equivalent( equivalent( equivalent( U, W ), 
% 0.40/1.07    equivalent( U, V0 ) ), V1 ) ), equivalent( equivalent( W, V0 ), V1 ) ) )] )
% 0.40/1.07    , substitution( 1, [ :=( X, equivalent( V0, W ) ), :=( Y, equivalent( 
% 0.40/1.07    equivalent( X, equivalent( equivalent( Y, Z ), equivalent( Y, T ) ) ), 
% 0.40/1.07    equivalent( X, equivalent( Z, T ) ) ) ), :=( Z, equivalent( equivalent( 
% 0.40/1.07    equivalent( U, W ), equivalent( U, V0 ) ), V1 ) ), :=( T, X ), :=( U, Y )
% 0.40/1.07    , :=( W, Z ), :=( V0, T ), :=( V1, equivalent( equivalent( W, V0 ), V1 )
% 0.40/1.07     )] )).
% 0.40/1.07  
% 0.40/1.07  
% 0.40/1.07  subsumption(
% 0.40/1.07  clause( 7, [ 'is_a_theorem'( equivalent( equivalent( equivalent( equivalent( 
% 0.40/1.07    X, equivalent( equivalent( Y, Z ), equivalent( Y, T ) ) ), equivalent( X
% 0.40/1.07    , equivalent( Z, T ) ) ), equivalent( equivalent( equivalent( U, W ), 
% 0.40/1.07    equivalent( U, V0 ) ), V1 ) ), equivalent( equivalent( W, V0 ), V1 ) ) )
% 0.40/1.07     ] )
% 0.40/1.07  , clause( 741, [ 'is_a_theorem'( equivalent( equivalent( equivalent( 
% 0.40/1.07    equivalent( X, equivalent( equivalent( Y, Z ), equivalent( Y, T ) ) ), 
% 0.40/1.07    equivalent( X, equivalent( Z, T ) ) ), equivalent( equivalent( equivalent( 
% 0.40/1.07    U, W ), equivalent( U, V0 ) ), V1 ) ), equivalent( equivalent( W, V0 ), 
% 0.40/1.07    V1 ) ) ) ] )
% 0.40/1.07  , substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z ), :=( T, T ), :=( U
% 0.40/1.07    , U ), :=( W, W ), :=( V0, V0 ), :=( V1, V1 )] ), permutation( 0, [ ==>( 
% 0.40/1.07    0, 0 )] ) ).
% 0.40/1.07  
% 0.40/1.07  
% 0.40/1.07  resolution(
% 0.40/1.07  clause( 743, [ ~( 'is_a_theorem'( equivalent( equivalent( equivalent( 
% 0.40/1.07    equivalent( equivalent( X, Y ), equivalent( X, Z ) ), equivalent( 
% 0.40/1.07    equivalent( equivalent( T, equivalent( equivalent( U, W ), equivalent( U
% 0.40/1.07    , V0 ) ) ), equivalent( T, equivalent( W, V0 ) ) ), V1 ) ), equivalent( 
% 0.40/1.07    equivalent( Y, Z ), V1 ) ), V2 ) ) ), 'is_a_theorem'( V2 ) ] )
% 0.40/1.07  , clause( 0, [ ~( 'is_a_theorem'( equivalent( X, Y ) ) ), 'is_a_theorem'( Y
% 0.40/1.07     ), ~( 'is_a_theorem'( X ) ) ] )
% 0.40/1.07  , 2, clause( 6, [ 'is_a_theorem'( equivalent( equivalent( equivalent( 
% 0.40/1.07    equivalent( X, Y ), equivalent( X, Z ) ), equivalent( equivalent( 
% 0.40/1.07    equivalent( T, equivalent( equivalent( U, W ), equivalent( U, V0 ) ) ), 
% 0.40/1.07    equivalent( T, equivalent( W, V0 ) ) ), V1 ) ), equivalent( equivalent( Y
% 0.40/1.07    , Z ), V1 ) ) ) ] )
% 0.40/1.07  , 0, substitution( 0, [ :=( X, equivalent( equivalent( equivalent( 
% 0.40/1.07    equivalent( X, Y ), equivalent( X, Z ) ), equivalent( equivalent( 
% 0.40/1.07    equivalent( T, equivalent( equivalent( U, W ), equivalent( U, V0 ) ) ), 
% 0.40/1.07    equivalent( T, equivalent( W, V0 ) ) ), V1 ) ), equivalent( equivalent( Y
% 0.40/1.07    , Z ), V1 ) ) ), :=( Y, V2 )] ), substitution( 1, [ :=( X, X ), :=( Y, Y
% 0.40/1.07     ), :=( Z, Z ), :=( T, T ), :=( U, U ), :=( W, W ), :=( V0, V0 ), :=( V1
% 0.40/1.07    , V1 )] )).
% 0.40/1.07  
% 0.40/1.07  
% 0.40/1.07  subsumption(
% 0.40/1.07  clause( 8, [ 'is_a_theorem'( V2 ), ~( 'is_a_theorem'( equivalent( 
% 0.40/1.07    equivalent( equivalent( equivalent( equivalent( X, Y ), equivalent( X, Z
% 0.40/1.07     ) ), equivalent( equivalent( equivalent( T, equivalent( equivalent( U, W
% 0.40/1.07     ), equivalent( U, V0 ) ) ), equivalent( T, equivalent( W, V0 ) ) ), V1 )
% 0.40/1.07     ), equivalent( equivalent( Y, Z ), V1 ) ), V2 ) ) ) ] )
% 0.40/1.07  , clause( 743, [ ~( 'is_a_theorem'( equivalent( equivalent( equivalent( 
% 0.40/1.07    equivalent( equivalent( X, Y ), equivalent( X, Z ) ), equivalent( 
% 0.40/1.07    equivalent( equivalent( T, equivalent( equivalent( U, W ), equivalent( U
% 0.40/1.07    , V0 ) ) ), equivalent( T, equivalent( W, V0 ) ) ), V1 ) ), equivalent( 
% 0.40/1.07    equivalent( Y, Z ), V1 ) ), V2 ) ) ), 'is_a_theorem'( V2 ) ] )
% 0.40/1.07  , substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z ), :=( T, T ), :=( U
% 0.40/1.07    , U ), :=( W, W ), :=( V0, V0 ), :=( V1, V1 ), :=( V2, V2 )] ), 
% 0.40/1.07    permutation( 0, [ ==>( 0, 1 ), ==>( 1, 0 )] ) ).
% 0.40/1.07  
% 0.40/1.07  
% 0.40/1.07  resolution(
% 0.40/1.07  clause( 744, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, Y ), 
% 0.40/1.07    Z ), equivalent( equivalent( equivalent( T, X ), equivalent( T, Y ) ), Z
% 0.40/1.07     ) ) ) ] )
% 0.40/1.07  , clause( 8, [ 'is_a_theorem'( V2 ), ~( 'is_a_theorem'( equivalent( 
% 0.40/1.07    equivalent( equivalent( equivalent( equivalent( X, Y ), equivalent( X, Z
% 0.40/1.07     ) ), equivalent( equivalent( equivalent( T, equivalent( equivalent( U, W
% 0.40/1.07     ), equivalent( U, V0 ) ) ), equivalent( T, equivalent( W, V0 ) ) ), V1 )
% 0.40/1.07     ), equivalent( equivalent( Y, Z ), V1 ) ), V2 ) ) ) ] )
% 0.40/1.07  , 1, clause( 7, [ 'is_a_theorem'( equivalent( equivalent( equivalent( 
% 0.40/1.07    equivalent( X, equivalent( equivalent( Y, Z ), equivalent( Y, T ) ) ), 
% 0.40/1.07    equivalent( X, equivalent( Z, T ) ) ), equivalent( equivalent( equivalent( 
% 0.40/1.07    U, W ), equivalent( U, V0 ) ), V1 ) ), equivalent( equivalent( W, V0 ), 
% 0.40/1.07    V1 ) ) ) ] )
% 0.40/1.07  , 0, substitution( 0, [ :=( X, equivalent( U, equivalent( equivalent( T, X
% 0.40/1.07     ), equivalent( T, Y ) ) ) ), :=( Y, equivalent( U, equivalent( X, Y ) )
% 0.40/1.07     ), :=( Z, equivalent( U, Z ) ), :=( T, U ), :=( U, T ), :=( W, X ), :=( 
% 0.40/1.07    V0, Y ), :=( V1, equivalent( equivalent( equivalent( T, X ), equivalent( 
% 0.40/1.07    T, Y ) ), Z ) ), :=( V2, equivalent( equivalent( equivalent( X, Y ), Z )
% 0.40/1.07    , equivalent( equivalent( equivalent( T, X ), equivalent( T, Y ) ), Z ) )
% 0.40/1.07     )] ), substitution( 1, [ :=( X, equivalent( equivalent( U, equivalent( 
% 0.40/1.07    equivalent( T, X ), equivalent( T, Y ) ) ), equivalent( U, equivalent( X
% 0.40/1.07    , Y ) ) ) ), :=( Y, U ), :=( Z, equivalent( equivalent( T, X ), 
% 0.40/1.07    equivalent( T, Y ) ) ), :=( T, Z ), :=( U, U ), :=( W, equivalent( X, Y )
% 0.40/1.07     ), :=( V0, Z ), :=( V1, equivalent( equivalent( equivalent( T, X ), 
% 0.40/1.07    equivalent( T, Y ) ), Z ) )] )).
% 0.40/1.07  
% 0.40/1.07  
% 0.40/1.07  subsumption(
% 0.40/1.07  clause( 17, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, Y ), Z
% 0.40/1.07     ), equivalent( equivalent( equivalent( T, X ), equivalent( T, Y ) ), Z )
% 0.40/1.07     ) ) ] )
% 0.40/1.07  , clause( 744, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, Y )
% 0.40/1.07    , Z ), equivalent( equivalent( equivalent( T, X ), equivalent( T, Y ) ), 
% 0.40/1.07    Z ) ) ) ] )
% 0.40/1.07  , substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z ), :=( T, T )] ), 
% 0.40/1.07    permutation( 0, [ ==>( 0, 0 )] ) ).
% 0.40/1.07  
% 0.40/1.07  
% 0.40/1.07  resolution(
% 0.40/1.07  clause( 746, [ ~( 'is_a_theorem'( equivalent( equivalent( equivalent( 
% 0.40/1.07    equivalent( X, Y ), Z ), equivalent( equivalent( equivalent( T, X ), 
% 0.40/1.07    equivalent( T, Y ) ), Z ) ), U ) ) ), 'is_a_theorem'( U ) ] )
% 0.40/1.07  , clause( 0, [ ~( 'is_a_theorem'( equivalent( X, Y ) ) ), 'is_a_theorem'( Y
% 0.40/1.07     ), ~( 'is_a_theorem'( X ) ) ] )
% 0.40/1.07  , 2, clause( 17, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, Y
% 0.40/1.07     ), Z ), equivalent( equivalent( equivalent( T, X ), equivalent( T, Y ) )
% 0.40/1.07    , Z ) ) ) ] )
% 0.40/1.07  , 0, substitution( 0, [ :=( X, equivalent( equivalent( equivalent( X, Y ), 
% 0.40/1.07    Z ), equivalent( equivalent( equivalent( T, X ), equivalent( T, Y ) ), Z
% 0.40/1.07     ) ) ), :=( Y, U )] ), substitution( 1, [ :=( X, X ), :=( Y, Y ), :=( Z, 
% 0.40/1.07    Z ), :=( T, T )] )).
% 0.40/1.07  
% 0.40/1.07  
% 0.40/1.07  subsumption(
% 0.40/1.07  clause( 23, [ 'is_a_theorem'( U ), ~( 'is_a_theorem'( equivalent( 
% 0.40/1.07    equivalent( equivalent( equivalent( X, Y ), Z ), equivalent( equivalent( 
% 0.40/1.07    equivalent( T, X ), equivalent( T, Y ) ), Z ) ), U ) ) ) ] )
% 0.40/1.07  , clause( 746, [ ~( 'is_a_theorem'( equivalent( equivalent( equivalent( 
% 0.40/1.07    equivalent( X, Y ), Z ), equivalent( equivalent( equivalent( T, X ), 
% 0.40/1.07    equivalent( T, Y ) ), Z ) ), U ) ) ), 'is_a_theorem'( U ) ] )
% 0.40/1.07  , substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z ), :=( T, T ), :=( U
% 0.40/1.07    , U )] ), permutation( 0, [ ==>( 0, 1 ), ==>( 1, 0 )] ) ).
% 0.40/1.07  
% 0.40/1.07  
% 0.40/1.07  resolution(
% 0.40/1.07  clause( 747, [ 'is_a_theorem'( equivalent( equivalent( X, equivalent( 
% 0.40/1.07    equivalent( Y, Z ), equivalent( Y, T ) ) ), equivalent( X, equivalent( Z
% 0.40/1.07    , T ) ) ) ) ] )
% 0.40/1.07  , clause( 23, [ 'is_a_theorem'( U ), ~( 'is_a_theorem'( equivalent( 
% 0.40/1.07    equivalent( equivalent( equivalent( X, Y ), Z ), equivalent( equivalent( 
% 0.40/1.07    equivalent( T, X ), equivalent( T, Y ) ), Z ) ), U ) ) ) ] )
% 0.40/1.07  , 1, clause( 7, [ 'is_a_theorem'( equivalent( equivalent( equivalent( 
% 0.40/1.07    equivalent( X, equivalent( equivalent( Y, Z ), equivalent( Y, T ) ) ), 
% 0.40/1.07    equivalent( X, equivalent( Z, T ) ) ), equivalent( equivalent( equivalent( 
% 0.40/1.07    U, W ), equivalent( U, V0 ) ), V1 ) ), equivalent( equivalent( W, V0 ), 
% 0.40/1.07    V1 ) ) ) ] )
% 0.40/1.07  , 0, substitution( 0, [ :=( X, X ), :=( Y, equivalent( equivalent( Y, Z ), 
% 0.40/1.07    equivalent( Y, T ) ) ), :=( Z, equivalent( X, equivalent( Z, T ) ) ), 
% 0.40/1.07    :=( T, U ), :=( U, equivalent( equivalent( X, equivalent( equivalent( Y, 
% 0.40/1.07    Z ), equivalent( Y, T ) ) ), equivalent( X, equivalent( Z, T ) ) ) )] ), 
% 0.40/1.07    substitution( 1, [ :=( X, X ), :=( Y, Y ), :=( Z, Z ), :=( T, T ), :=( U
% 0.40/1.07    , U ), :=( W, X ), :=( V0, equivalent( equivalent( Y, Z ), equivalent( Y
% 0.40/1.07    , T ) ) ), :=( V1, equivalent( X, equivalent( Z, T ) ) )] )).
% 0.40/1.07  
% 0.40/1.07  
% 0.40/1.07  subsumption(
% 0.40/1.07  clause( 27, [ 'is_a_theorem'( equivalent( equivalent( X, equivalent( 
% 0.40/1.07    equivalent( Y, Z ), equivalent( Y, T ) ) ), equivalent( X, equivalent( Z
% 0.40/1.07    , T ) ) ) ) ] )
% 0.40/1.07  , clause( 747, [ 'is_a_theorem'( equivalent( equivalent( X, equivalent( 
% 0.40/1.07    equivalent( Y, Z ), equivalent( Y, T ) ) ), equivalent( X, equivalent( Z
% 0.40/1.07    , T ) ) ) ) ] )
% 0.40/1.07  , substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z ), :=( T, T )] ), 
% 0.40/1.07    permutation( 0, [ ==>( 0, 0 )] ) ).
% 0.40/1.07  
% 0.40/1.07  
% 0.40/1.07  resolution(
% 0.40/1.07  clause( 748, [ 'is_a_theorem'( equivalent( equivalent( equivalent( 
% 0.40/1.07    equivalent( X, equivalent( Y, Z ) ), equivalent( X, equivalent( Y, T ) )
% 0.40/1.07     ), U ), equivalent( equivalent( Z, T ), U ) ) ) ] )
% 0.40/1.07  , clause( 23, [ 'is_a_theorem'( U ), ~( 'is_a_theorem'( equivalent( 
% 0.40/1.07    equivalent( equivalent( equivalent( X, Y ), Z ), equivalent( equivalent( 
% 0.40/1.07    equivalent( T, X ), equivalent( T, Y ) ), Z ) ), U ) ) ) ] )
% 0.40/1.07  , 1, clause( 1, [ 'is_a_theorem'( equivalent( equivalent( equivalent( 
% 0.40/1.07    equivalent( X, Y ), Z ), equivalent( equivalent( T, U ), equivalent( 
% 0.40/1.07    equivalent( equivalent( W, U ), equivalent( W, T ) ), V0 ) ) ), 
% 0.40/1.07    equivalent( Z, equivalent( equivalent( Y, X ), V0 ) ) ) ) ] )
% 0.40/1.07  , 0, substitution( 0, [ :=( X, T ), :=( Y, Z ), :=( Z, equivalent( 
% 0.40/1.07    equivalent( equivalent( X, equivalent( Y, Z ) ), equivalent( X, 
% 0.40/1.07    equivalent( Y, T ) ) ), U ) ), :=( T, Y ), :=( U, equivalent( equivalent( 
% 0.40/1.07    equivalent( equivalent( X, equivalent( Y, Z ) ), equivalent( X, 
% 0.40/1.07    equivalent( Y, T ) ) ), U ), equivalent( equivalent( Z, T ), U ) ) )] ), 
% 0.40/1.07    substitution( 1, [ :=( X, T ), :=( Y, Z ), :=( Z, equivalent( equivalent( 
% 0.40/1.07    equivalent( X, equivalent( Y, Z ) ), equivalent( X, equivalent( Y, T ) )
% 0.40/1.07     ), U ) ), :=( T, equivalent( Y, T ) ), :=( U, equivalent( Y, Z ) ), :=( 
% 0.40/1.07    W, X ), :=( V0, U )] )).
% 0.40/1.07  
% 0.40/1.07  
% 0.40/1.07  subsumption(
% 0.40/1.07  clause( 28, [ 'is_a_theorem'( equivalent( equivalent( equivalent( 
% 0.40/1.07    equivalent( X, equivalent( Y, Z ) ), equivalent( X, equivalent( Y, T ) )
% 0.40/1.07     ), U ), equivalent( equivalent( Z, T ), U ) ) ) ] )
% 0.40/1.07  , clause( 748, [ 'is_a_theorem'( equivalent( equivalent( equivalent( 
% 0.40/1.07    equivalent( X, equivalent( Y, Z ) ), equivalent( X, equivalent( Y, T ) )
% 0.40/1.07     ), U ), equivalent( equivalent( Z, T ), U ) ) ) ] )
% 0.40/1.07  , substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z ), :=( T, T ), :=( U
% 0.40/1.07    , U )] ), permutation( 0, [ ==>( 0, 0 )] ) ).
% 0.40/1.07  
% 0.40/1.07  
% 0.40/1.07  resolution(
% 0.40/1.07  clause( 749, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, Y ), 
% 0.40/1.07    equivalent( equivalent( Z, X ), T ) ), equivalent( equivalent( Z, Y ), T
% 0.40/1.07     ) ) ) ] )
% 0.40/1.07  , clause( 23, [ 'is_a_theorem'( U ), ~( 'is_a_theorem'( equivalent( 
% 0.40/1.07    equivalent( equivalent( equivalent( X, Y ), Z ), equivalent( equivalent( 
% 0.40/1.07    equivalent( T, X ), equivalent( T, Y ) ), Z ) ), U ) ) ) ] )
% 0.40/1.07  , 1, clause( 27, [ 'is_a_theorem'( equivalent( equivalent( X, equivalent( 
% 0.40/1.07    equivalent( Y, Z ), equivalent( Y, T ) ) ), equivalent( X, equivalent( Z
% 0.40/1.07    , T ) ) ) ) ] )
% 0.40/1.07  , 0, substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, equivalent( 
% 0.40/1.07    equivalent( Z, X ), T ) ), :=( T, Z ), :=( U, equivalent( equivalent( 
% 0.40/1.07    equivalent( X, Y ), equivalent( equivalent( Z, X ), T ) ), equivalent( 
% 0.40/1.07    equivalent( Z, Y ), T ) ) )] ), substitution( 1, [ :=( X, equivalent( 
% 0.40/1.07    equivalent( X, Y ), equivalent( equivalent( Z, X ), T ) ) ), :=( Y, 
% 0.40/1.07    equivalent( Z, X ) ), :=( Z, equivalent( Z, Y ) ), :=( T, T )] )).
% 0.40/1.07  
% 0.40/1.07  
% 0.40/1.07  subsumption(
% 0.40/1.07  clause( 42, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, Y ), 
% 0.40/1.07    equivalent( equivalent( Z, X ), T ) ), equivalent( equivalent( Z, Y ), T
% 0.40/1.07     ) ) ) ] )
% 0.40/1.07  , clause( 749, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, Y )
% 0.40/1.07    , equivalent( equivalent( Z, X ), T ) ), equivalent( equivalent( Z, Y ), 
% 0.40/1.07    T ) ) ) ] )
% 0.40/1.07  , substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z ), :=( T, T )] ), 
% 0.40/1.07    permutation( 0, [ ==>( 0, 0 )] ) ).
% 0.40/1.07  
% 0.40/1.07  
% 0.40/1.07  resolution(
% 0.40/1.07  clause( 751, [ ~( 'is_a_theorem'( equivalent( equivalent( equivalent( X, 
% 0.40/1.07    equivalent( equivalent( Y, Z ), equivalent( Y, T ) ) ), equivalent( X, 
% 0.40/1.07    equivalent( Z, T ) ) ), U ) ) ), 'is_a_theorem'( U ) ] )
% 0.40/1.07  , clause( 0, [ ~( 'is_a_theorem'( equivalent( X, Y ) ) ), 'is_a_theorem'( Y
% 0.40/1.07     ), ~( 'is_a_theorem'( X ) ) ] )
% 0.40/1.07  , 2, clause( 27, [ 'is_a_theorem'( equivalent( equivalent( X, equivalent( 
% 0.40/1.07    equivalent( Y, Z ), equivalent( Y, T ) ) ), equivalent( X, equivalent( Z
% 0.40/1.07    , T ) ) ) ) ] )
% 0.40/1.07  , 0, substitution( 0, [ :=( X, equivalent( equivalent( X, equivalent( 
% 0.40/1.07    equivalent( Y, Z ), equivalent( Y, T ) ) ), equivalent( X, equivalent( Z
% 0.40/1.07    , T ) ) ) ), :=( Y, U )] ), substitution( 1, [ :=( X, X ), :=( Y, Y ), 
% 0.40/1.07    :=( Z, Z ), :=( T, T )] )).
% 0.40/1.07  
% 0.40/1.07  
% 0.40/1.07  subsumption(
% 0.40/1.07  clause( 46, [ 'is_a_theorem'( U ), ~( 'is_a_theorem'( equivalent( 
% 0.40/1.07    equivalent( equivalent( X, equivalent( equivalent( Y, Z ), equivalent( Y
% 0.40/1.07    , T ) ) ), equivalent( X, equivalent( Z, T ) ) ), U ) ) ) ] )
% 0.40/1.07  , clause( 751, [ ~( 'is_a_theorem'( equivalent( equivalent( equivalent( X, 
% 0.40/1.07    equivalent( equivalent( Y, Z ), equivalent( Y, T ) ) ), equivalent( X, 
% 0.40/1.07    equivalent( Z, T ) ) ), U ) ) ), 'is_a_theorem'( U ) ] )
% 0.40/1.07  , substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z ), :=( T, T ), :=( U
% 0.40/1.07    , U )] ), permutation( 0, [ ==>( 0, 1 ), ==>( 1, 0 )] ) ).
% 0.40/1.07  
% 0.40/1.07  
% 0.40/1.07  resolution(
% 0.40/1.07  clause( 752, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, X ), 
% 0.40/1.07    Y ), Y ) ) ] )
% 0.40/1.07  , clause( 23, [ 'is_a_theorem'( U ), ~( 'is_a_theorem'( equivalent( 
% 0.40/1.07    equivalent( equivalent( equivalent( X, Y ), Z ), equivalent( equivalent( 
% 0.40/1.07    equivalent( T, X ), equivalent( T, Y ) ), Z ) ), U ) ) ) ] )
% 0.40/1.07  , 1, clause( 42, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, Y
% 0.40/1.07     ), equivalent( equivalent( Z, X ), T ) ), equivalent( equivalent( Z, Y )
% 0.40/1.07    , T ) ) ) ] )
% 0.40/1.07  , 0, substitution( 0, [ :=( X, X ), :=( Y, Z ), :=( Z, Y ), :=( T, X ), 
% 0.40/1.07    :=( U, equivalent( equivalent( equivalent( X, X ), Y ), Y ) )] ), 
% 0.40/1.07    substitution( 1, [ :=( X, equivalent( X, Z ) ), :=( Y, Y ), :=( Z, 
% 0.40/1.07    equivalent( X, X ) ), :=( T, Y )] )).
% 0.40/1.07  
% 0.40/1.07  
% 0.40/1.07  subsumption(
% 0.40/1.07  clause( 48, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, X ), Y
% 0.40/1.07     ), Y ) ) ] )
% 0.40/1.07  , clause( 752, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, X )
% 0.40/1.07    , Y ), Y ) ) ] )
% 0.40/1.07  , substitution( 0, [ :=( X, X ), :=( Y, Y )] ), permutation( 0, [ ==>( 0, 0
% 0.40/1.07     )] ) ).
% 0.40/1.07  
% 0.40/1.07  
% 0.40/1.07  resolution(
% 0.40/1.07  clause( 754, [ ~( 'is_a_theorem'( equivalent( equivalent( equivalent( 
% 0.40/1.07    equivalent( X, X ), Y ), Y ), Z ) ) ), 'is_a_theorem'( Z ) ] )
% 0.40/1.07  , clause( 0, [ ~( 'is_a_theorem'( equivalent( X, Y ) ) ), 'is_a_theorem'( Y
% 0.40/1.07     ), ~( 'is_a_theorem'( X ) ) ] )
% 0.40/1.07  , 2, clause( 48, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, X
% 0.40/1.07     ), Y ), Y ) ) ] )
% 0.40/1.07  , 0, substitution( 0, [ :=( X, equivalent( equivalent( equivalent( X, X ), 
% 0.40/1.07    Y ), Y ) ), :=( Y, Z )] ), substitution( 1, [ :=( X, X ), :=( Y, Y )] )
% 0.40/1.07    ).
% 0.40/1.07  
% 0.40/1.07  
% 0.40/1.07  subsumption(
% 0.40/1.07  clause( 54, [ 'is_a_theorem'( Z ), ~( 'is_a_theorem'( equivalent( 
% 0.40/1.07    equivalent( equivalent( equivalent( X, X ), Y ), Y ), Z ) ) ) ] )
% 0.40/1.07  , clause( 754, [ ~( 'is_a_theorem'( equivalent( equivalent( equivalent( 
% 0.40/1.07    equivalent( X, X ), Y ), Y ), Z ) ) ), 'is_a_theorem'( Z ) ] )
% 0.40/1.07  , substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z )] ), 
% 0.40/1.07    permutation( 0, [ ==>( 0, 1 ), ==>( 1, 0 )] ) ).
% 0.40/1.07  
% 0.40/1.07  
% 0.40/1.07  resolution(
% 0.40/1.07  clause( 755, [ 'is_a_theorem'( equivalent( X, X ) ) ] )
% 0.40/1.07  , clause( 54, [ 'is_a_theorem'( Z ), ~( 'is_a_theorem'( equivalent( 
% 0.40/1.07    equivalent( equivalent( equivalent( X, X ), Y ), Y ), Z ) ) ) ] )
% 0.40/1.07  , 1, clause( 48, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, X
% 0.40/1.07     ), Y ), Y ) ) ] )
% 0.40/1.07  , 0, substitution( 0, [ :=( X, X ), :=( Y, equivalent( X, X ) ), :=( Z, 
% 0.40/1.07    equivalent( X, X ) )] ), substitution( 1, [ :=( X, equivalent( X, X ) ), 
% 0.40/1.07    :=( Y, equivalent( X, X ) )] )).
% 0.40/1.07  
% 0.40/1.07  
% 0.40/1.07  subsumption(
% 0.40/1.07  clause( 72, [ 'is_a_theorem'( equivalent( X, X ) ) ] )
% 0.40/1.07  , clause( 755, [ 'is_a_theorem'( equivalent( X, X ) ) ] )
% 0.40/1.07  , substitution( 0, [ :=( X, X )] ), permutation( 0, [ ==>( 0, 0 )] ) ).
% 0.40/1.07  
% 0.40/1.07  
% 0.40/1.07  resolution(
% 0.40/1.07  clause( 757, [ ~( 'is_a_theorem'( equivalent( equivalent( X, X ), Y ) ) ), 
% 0.40/1.07    'is_a_theorem'( Y ) ] )
% 0.40/1.07  , clause( 0, [ ~( 'is_a_theorem'( equivalent( X, Y ) ) ), 'is_a_theorem'( Y
% 0.40/1.07     ), ~( 'is_a_theorem'( X ) ) ] )
% 0.40/1.07  , 2, clause( 72, [ 'is_a_theorem'( equivalent( X, X ) ) ] )
% 0.40/1.07  , 0, substitution( 0, [ :=( X, equivalent( X, X ) ), :=( Y, Y )] ), 
% 0.40/1.07    substitution( 1, [ :=( X, X )] )).
% 0.40/1.07  
% 0.40/1.07  
% 0.40/1.07  subsumption(
% 0.40/1.07  clause( 79, [ 'is_a_theorem'( Y ), ~( 'is_a_theorem'( equivalent( 
% 0.40/1.07    equivalent( X, X ), Y ) ) ) ] )
% 0.40/1.07  , clause( 757, [ ~( 'is_a_theorem'( equivalent( equivalent( X, X ), Y ) ) )
% 0.40/1.07    , 'is_a_theorem'( Y ) ] )
% 0.40/1.07  , substitution( 0, [ :=( X, X ), :=( Y, Y )] ), permutation( 0, [ ==>( 0, 1
% 0.40/1.07     ), ==>( 1, 0 )] ) ).
% 0.40/1.07  
% 0.40/1.07  
% 0.40/1.07  resolution(
% 0.40/1.07  clause( 758, [ 'is_a_theorem'( equivalent( equivalent( X, Y ), equivalent( 
% 0.40/1.07    equivalent( Z, equivalent( T, X ) ), equivalent( Z, equivalent( T, Y ) )
% 0.40/1.07     ) ) ) ] )
% 0.40/1.07  , clause( 79, [ 'is_a_theorem'( Y ), ~( 'is_a_theorem'( equivalent( 
% 0.40/1.07    equivalent( X, X ), Y ) ) ) ] )
% 0.40/1.07  , 1, clause( 28, [ 'is_a_theorem'( equivalent( equivalent( equivalent( 
% 0.40/1.07    equivalent( X, equivalent( Y, Z ) ), equivalent( X, equivalent( Y, T ) )
% 0.40/1.07     ), U ), equivalent( equivalent( Z, T ), U ) ) ) ] )
% 0.40/1.07  , 0, substitution( 0, [ :=( X, equivalent( equivalent( Z, equivalent( T, X
% 0.40/1.07     ) ), equivalent( Z, equivalent( T, Y ) ) ) ), :=( Y, equivalent( 
% 0.40/1.07    equivalent( X, Y ), equivalent( equivalent( Z, equivalent( T, X ) ), 
% 0.40/1.07    equivalent( Z, equivalent( T, Y ) ) ) ) )] ), substitution( 1, [ :=( X, Z
% 0.40/1.07     ), :=( Y, T ), :=( Z, X ), :=( T, Y ), :=( U, equivalent( equivalent( Z
% 0.40/1.07    , equivalent( T, X ) ), equivalent( Z, equivalent( T, Y ) ) ) )] )).
% 0.40/1.07  
% 0.40/1.07  
% 0.40/1.07  subsumption(
% 0.40/1.07  clause( 301, [ 'is_a_theorem'( equivalent( equivalent( X, Y ), equivalent( 
% 0.40/1.07    equivalent( Z, equivalent( T, X ) ), equivalent( Z, equivalent( T, Y ) )
% 0.40/1.07     ) ) ) ] )
% 0.40/1.07  , clause( 758, [ 'is_a_theorem'( equivalent( equivalent( X, Y ), equivalent( 
% 0.40/1.07    equivalent( Z, equivalent( T, X ) ), equivalent( Z, equivalent( T, Y ) )
% 0.40/1.07     ) ) ) ] )
% 0.40/1.07  , substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z ), :=( T, T )] ), 
% 0.40/1.07    permutation( 0, [ ==>( 0, 0 )] ) ).
% 0.40/1.07  
% 0.40/1.07  
% 0.40/1.07  resolution(
% 0.40/1.07  clause( 759, [ 'is_a_theorem'( equivalent( equivalent( X, equivalent( Y, 
% 0.40/1.07    equivalent( equivalent( Z, Z ), T ) ) ), equivalent( X, equivalent( Y, T
% 0.40/1.07     ) ) ) ) ] )
% 0.40/1.07  , clause( 54, [ 'is_a_theorem'( Z ), ~( 'is_a_theorem'( equivalent( 
% 0.40/1.07    equivalent( equivalent( equivalent( X, X ), Y ), Y ), Z ) ) ) ] )
% 0.40/1.07  , 1, clause( 301, [ 'is_a_theorem'( equivalent( equivalent( X, Y ), 
% 0.40/1.07    equivalent( equivalent( Z, equivalent( T, X ) ), equivalent( Z, 
% 0.40/1.07    equivalent( T, Y ) ) ) ) ) ] )
% 0.40/1.07  , 0, substitution( 0, [ :=( X, Z ), :=( Y, T ), :=( Z, equivalent( 
% 0.40/1.07    equivalent( X, equivalent( Y, equivalent( equivalent( Z, Z ), T ) ) ), 
% 0.40/1.07    equivalent( X, equivalent( Y, T ) ) ) )] ), substitution( 1, [ :=( X, 
% 0.40/1.07    equivalent( equivalent( Z, Z ), T ) ), :=( Y, T ), :=( Z, X ), :=( T, Y )] )
% 0.40/1.07    ).
% 0.40/1.07  
% 0.40/1.07  
% 0.40/1.07  subsumption(
% 0.40/1.07  clause( 309, [ 'is_a_theorem'( equivalent( equivalent( X, equivalent( Y, 
% 0.40/1.07    equivalent( equivalent( Z, Z ), T ) ) ), equivalent( X, equivalent( Y, T
% 0.40/1.07     ) ) ) ) ] )
% 0.40/1.07  , clause( 759, [ 'is_a_theorem'( equivalent( equivalent( X, equivalent( Y, 
% 0.40/1.07    equivalent( equivalent( Z, Z ), T ) ) ), equivalent( X, equivalent( Y, T
% 0.40/1.07     ) ) ) ) ] )
% 0.40/1.07  , substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z ), :=( T, T )] ), 
% 0.40/1.07    permutation( 0, [ ==>( 0, 0 )] ) ).
% 0.40/1.07  
% 0.40/1.07  
% 0.40/1.07  resolution(
% 0.40/1.07  clause( 760, [ 'is_a_theorem'( equivalent( equivalent( X, equivalent( 
% 0.40/1.07    equivalent( Y, equivalent( Z, Z ) ), equivalent( Y, T ) ) ), equivalent( 
% 0.40/1.07    X, T ) ) ) ] )
% 0.40/1.07  , clause( 46, [ 'is_a_theorem'( U ), ~( 'is_a_theorem'( equivalent( 
% 0.40/1.07    equivalent( equivalent( X, equivalent( equivalent( Y, Z ), equivalent( Y
% 0.40/1.07    , T ) ) ), equivalent( X, equivalent( Z, T ) ) ), U ) ) ) ] )
% 0.40/1.07  , 1, clause( 309, [ 'is_a_theorem'( equivalent( equivalent( X, equivalent( 
% 0.40/1.07    Y, equivalent( equivalent( Z, Z ), T ) ) ), equivalent( X, equivalent( Y
% 0.40/1.07    , T ) ) ) ) ] )
% 0.40/1.07  , 0, substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, equivalent( Z, Z ) )
% 0.40/1.07    , :=( T, T ), :=( U, equivalent( equivalent( X, equivalent( equivalent( Y
% 0.40/1.07    , equivalent( Z, Z ) ), equivalent( Y, T ) ) ), equivalent( X, T ) ) )] )
% 0.40/1.07    , substitution( 1, [ :=( X, equivalent( X, equivalent( equivalent( Y, 
% 0.40/1.07    equivalent( Z, Z ) ), equivalent( Y, T ) ) ) ), :=( Y, X ), :=( Z, Z ), 
% 0.40/1.07    :=( T, T )] )).
% 0.40/1.07  
% 0.40/1.07  
% 0.40/1.07  subsumption(
% 0.40/1.07  clause( 695, [ 'is_a_theorem'( equivalent( equivalent( X, equivalent( 
% 0.40/1.07    equivalent( Y, equivalent( Z, Z ) ), equivalent( Y, T ) ) ), equivalent( 
% 0.40/1.07    X, T ) ) ) ] )
% 0.40/1.07  , clause( 760, [ 'is_a_theorem'( equivalent( equivalent( X, equivalent( 
% 0.40/1.07    equivalent( Y, equivalent( Z, Z ) ), equivalent( Y, T ) ) ), equivalent( 
% 0.40/1.07    X, T ) ) ) ] )
% 0.40/1.07  , substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z ), :=( T, T )] ), 
% 0.40/1.07    permutation( 0, [ ==>( 0, 0 )] ) ).
% 0.40/1.07  
% 0.40/1.07  
% 0.40/1.07  resolution(
% 0.40/1.07  clause( 761, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, Y ), 
% 0.40/1.07    equivalent( equivalent( Y, X ), Z ) ), Z ) ) ] )
% 0.40/1.07  , clause( 23, [ 'is_a_theorem'( U ), ~( 'is_a_theorem'( equivalent( 
% 0.40/1.07    equivalent( equivalent( equivalent( X, Y ), Z ), equivalent( equivalent( 
% 0.40/1.07    equivalent( T, X ), equivalent( T, Y ) ), Z ) ), U ) ) ) ] )
% 0.40/1.07  , 1, clause( 695, [ 'is_a_theorem'( equivalent( equivalent( X, equivalent( 
% 0.40/1.07    equivalent( Y, equivalent( Z, Z ) ), equivalent( Y, T ) ) ), equivalent( 
% 0.40/1.07    X, T ) ) ) ] )
% 0.40/1.07  , 0, substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, equivalent( 
% 0.40/1.07    equivalent( Y, X ), Z ) ), :=( T, Y ), :=( U, equivalent( equivalent( 
% 0.40/1.07    equivalent( X, Y ), equivalent( equivalent( Y, X ), Z ) ), Z ) )] ), 
% 0.40/1.07    substitution( 1, [ :=( X, equivalent( equivalent( X, Y ), equivalent( 
% 0.40/1.07    equivalent( Y, X ), Z ) ) ), :=( Y, equivalent( Y, X ) ), :=( Z, Y ), 
% 0.40/1.07    :=( T, Z )] )).
% 0.40/1.07  
% 0.40/1.07  
% 0.40/1.07  subsumption(
% 0.40/1.07  clause( 725, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, Y ), 
% 0.40/1.07    equivalent( equivalent( Y, X ), Z ) ), Z ) ) ] )
% 0.40/1.07  , clause( 761, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, Y )
% 0.40/1.07    , equivalent( equivalent( Y, X ), Z ) ), Z ) ) ] )
% 0.40/1.07  , substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z )] ), 
% 0.40/1.07    permutation( 0, [ ==>( 0, 0 )] ) ).
% 0.40/1.07  
% 0.40/1.07  
% 0.40/1.07  resolution(
% 0.40/1.07  clause( 762, [] )
% 0.40/1.07  , clause( 2, [ ~( 'is_a_theorem'( equivalent( equivalent( equivalent( a, b
% 0.40/1.07     ), equivalent( equivalent( b, a ), c ) ), c ) ) ) ] )
% 0.40/1.07  , 0, clause( 725, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, 
% 0.40/1.07    Y ), equivalent( equivalent( Y, X ), Z ) ), Z ) ) ] )
% 0.40/1.07  , 0, substitution( 0, [] ), substitution( 1, [ :=( X, a ), :=( Y, b ), :=( 
% 0.40/1.07    Z, c )] )).
% 0.40/1.07  
% 0.40/1.07  
% 0.40/1.07  subsumption(
% 0.40/1.07  clause( 730, [] )
% 0.40/1.07  , clause( 762, [] )
% 0.40/1.07  , substitution( 0, [] ), permutation( 0, [] ) ).
% 0.40/1.07  
% 0.40/1.07  
% 0.40/1.07  end.
% 0.40/1.07  
% 0.40/1.07  % ABCDEFGHIJKLMNOPQRSTUVWXYZ
% 0.40/1.07  
% 0.40/1.07  Memory use:
% 0.40/1.07  
% 0.40/1.07  space for terms:        18266
% 0.40/1.07  space for clauses:      95216
% 0.40/1.07  
% 0.40/1.07  
% 0.40/1.07  clauses generated:      1520
% 0.40/1.07  clauses kept:           731
% 0.40/1.07  clauses selected:       163
% 0.40/1.07  clauses deleted:        1
% 0.40/1.07  clauses inuse deleted:  0
% 0.40/1.07  
% 0.40/1.07  subsentry:          958
% 0.40/1.07  literals s-matched: 792
% 0.40/1.07  literals matched:   791
% 0.40/1.07  full subsumption:   0
% 0.40/1.07  
% 0.40/1.07  checksum:           -2057090910
% 0.40/1.07  
% 0.40/1.07  
% 0.40/1.07  Bliksem ended
%------------------------------------------------------------------------------