TSTP Solution File: LCL257-1 by Bliksem---1.12

View Problem - Process Solution

%------------------------------------------------------------------------------
% File     : Bliksem---1.12
% Problem  : LCL257-1 : TPTP v8.1.0. Released v2.0.0.
% Transfm  : none
% Format   : tptp:raw
% Command  : bliksem %s

% Computer : n026.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 07:52:19 EDT 2022

% Result   : Unsatisfiable 0.47s 1.14s
% Output   : Refutation 0.47s
% Verified : 
% SZS Type : -

% Comments : 
%------------------------------------------------------------------------------
%----WARNING: Could not form TPTP format derivation
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.08/0.13  % Problem  : LCL257-1 : TPTP v8.1.0. Released v2.0.0.
% 0.08/0.14  % Command  : bliksem %s
% 0.14/0.35  % Computer : n026.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  % DateTime : Sat Jul  2 16:54:35 EDT 2022
% 0.14/0.36  % CPUTime  : 
% 0.47/1.14  *** allocated 10000 integers for termspace/termends
% 0.47/1.14  *** allocated 10000 integers for clauses
% 0.47/1.14  *** allocated 10000 integers for justifications
% 0.47/1.14  Bliksem 1.12
% 0.47/1.14  
% 0.47/1.14  
% 0.47/1.14  Automatic Strategy Selection
% 0.47/1.14  
% 0.47/1.14  Clauses:
% 0.47/1.14  [
% 0.47/1.14     [ ~( 'is_a_theorem'( equivalent( X, Y ) ) ), ~( 'is_a_theorem'( X ) ), 
% 0.47/1.14    'is_a_theorem'( Y ) ],
% 0.47/1.14     [ 'is_a_theorem'( equivalent( equivalent( X, Y ), equivalent( equivalent( 
% 0.47/1.14    Z, Y ), equivalent( X, Z ) ) ) ) ],
% 0.47/1.14     [ ~( 'is_a_theorem'( equivalent( x, equivalent( equivalent( y, z ), 
% 0.47/1.14    equivalent( equivalent( z, x ), y ) ) ) ) ) ]
% 0.47/1.14  ] .
% 0.47/1.14  
% 0.47/1.14  
% 0.47/1.14  percentage equality = 0.000000, percentage horn = 1.000000
% 0.47/1.14  This is a near-Horn, non-equality  problem
% 0.47/1.14  
% 0.47/1.14  
% 0.47/1.14  Options Used:
% 0.47/1.14  
% 0.47/1.14  useres =            1
% 0.47/1.14  useparamod =        0
% 0.47/1.14  useeqrefl =         0
% 0.47/1.14  useeqfact =         0
% 0.47/1.14  usefactor =         1
% 0.47/1.14  usesimpsplitting =  0
% 0.47/1.14  usesimpdemod =      0
% 0.47/1.14  usesimpres =        4
% 0.47/1.14  
% 0.47/1.14  resimpinuse      =  1000
% 0.47/1.14  resimpclauses =     20000
% 0.47/1.14  substype =          standard
% 0.47/1.14  backwardsubs =      1
% 0.47/1.14  selectoldest =      5
% 0.47/1.14  
% 0.47/1.14  litorderings [0] =  split
% 0.47/1.14  litorderings [1] =  liftord
% 0.47/1.14  
% 0.47/1.14  termordering =      none
% 0.47/1.14  
% 0.47/1.14  litapriori =        1
% 0.47/1.14  termapriori =       0
% 0.47/1.14  litaposteriori =    0
% 0.47/1.14  termaposteriori =   0
% 0.47/1.14  demodaposteriori =  0
% 0.47/1.14  ordereqreflfact =   0
% 0.47/1.14  
% 0.47/1.14  litselect =         negative
% 0.47/1.14  
% 0.47/1.14  maxweight =         30000
% 0.47/1.14  maxdepth =          30000
% 0.47/1.14  maxlength =         115
% 0.47/1.14  maxnrvars =         195
% 0.47/1.14  excuselevel =       0
% 0.47/1.14  increasemaxweight = 0
% 0.47/1.14  
% 0.47/1.14  maxselected =       10000000
% 0.47/1.14  maxnrclauses =      10000000
% 0.47/1.14  
% 0.47/1.14  showgenerated =    0
% 0.47/1.14  showkept =         0
% 0.47/1.14  showselected =     0
% 0.47/1.14  showdeleted =      0
% 0.47/1.14  showresimp =       1
% 0.47/1.14  showstatus =       2000
% 0.47/1.14  
% 0.47/1.14  prologoutput =     1
% 0.47/1.14  nrgoals =          5000000
% 0.47/1.14  totalproof =       1
% 0.47/1.14  
% 0.47/1.14  Symbols occurring in the translation:
% 0.47/1.14  
% 0.47/1.14  {}  [0, 0]      (w:1, o:2, a:1, s:1, b:0), 
% 0.47/1.14  .  [1, 2]      (w:1, o:21, a:1, s:1, b:0), 
% 0.47/1.14  !  [4, 1]      (w:1, o:15, a:1, s:1, b:0), 
% 0.47/1.14  =  [13, 2]      (w:1, o:0, a:0, s:1, b:0), 
% 0.47/1.14  ==>  [14, 2]      (w:1, o:0, a:0, s:1, b:0), 
% 0.47/1.14  equivalent  [41, 2]      (w:1, o:46, a:1, s:1, b:0), 
% 0.47/1.14  'is_a_theorem'  [42, 1]      (w:1, o:20, a:1, s:1, b:0), 
% 0.47/1.14  x  [44, 0]      (w:1, o:12, a:1, s:1, b:0), 
% 0.47/1.14  y  [45, 0]      (w:1, o:13, a:1, s:1, b:0), 
% 0.47/1.14  z  [46, 0]      (w:1, o:14, a:1, s:1, b:0).
% 0.47/1.14  
% 0.47/1.14  
% 0.47/1.14  Starting Search:
% 0.47/1.14  
% 0.47/1.14  
% 0.47/1.14  Bliksems!, er is een bewijs:
% 0.47/1.14  % SZS status Unsatisfiable
% 0.47/1.14  % SZS output start Refutation
% 0.47/1.14  
% 0.47/1.14  clause( 0, [ ~( 'is_a_theorem'( equivalent( X, Y ) ) ), 'is_a_theorem'( Y )
% 0.47/1.14    , ~( 'is_a_theorem'( X ) ) ] )
% 0.47/1.14  .
% 0.47/1.14  clause( 1, [ 'is_a_theorem'( equivalent( equivalent( X, Y ), equivalent( 
% 0.47/1.14    equivalent( Z, Y ), equivalent( X, Z ) ) ) ) ] )
% 0.47/1.14  .
% 0.47/1.14  clause( 2, [ ~( 'is_a_theorem'( equivalent( x, equivalent( equivalent( y, z
% 0.47/1.14     ), equivalent( equivalent( z, x ), y ) ) ) ) ) ] )
% 0.47/1.14  .
% 0.47/1.14  clause( 3, [ 'is_a_theorem'( T ), ~( 'is_a_theorem'( equivalent( equivalent( 
% 0.47/1.14    equivalent( X, Y ), equivalent( equivalent( Z, Y ), equivalent( X, Z ) )
% 0.47/1.14     ), T ) ) ) ] )
% 0.47/1.14  .
% 0.47/1.14  clause( 4, [ 'is_a_theorem'( equivalent( equivalent( X, equivalent( 
% 0.47/1.14    equivalent( Y, Z ), equivalent( T, Y ) ) ), equivalent( equivalent( T, Z
% 0.47/1.14     ), X ) ) ) ] )
% 0.47/1.14  .
% 0.47/1.14  clause( 5, [ 'is_a_theorem'( equivalent( equivalent( X, Y ), equivalent( X
% 0.47/1.14    , Y ) ) ) ] )
% 0.47/1.14  .
% 0.47/1.14  clause( 6, [ 'is_a_theorem'( U ), ~( 'is_a_theorem'( equivalent( equivalent( 
% 0.47/1.14    equivalent( X, equivalent( equivalent( Y, Z ), equivalent( T, Y ) ) ), 
% 0.47/1.14    equivalent( equivalent( T, Z ), X ) ), U ) ) ) ] )
% 0.47/1.14  .
% 0.47/1.14  clause( 7, [ 'is_a_theorem'( Z ), ~( 'is_a_theorem'( equivalent( equivalent( 
% 0.47/1.14    equivalent( X, Y ), equivalent( X, Y ) ), Z ) ) ) ] )
% 0.47/1.14  .
% 0.47/1.14  clause( 8, [ 'is_a_theorem'( equivalent( equivalent( X, equivalent( Y, Z )
% 0.47/1.14     ), equivalent( equivalent( Y, Z ), X ) ) ) ] )
% 0.47/1.14  .
% 0.47/1.14  clause( 9, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, Y ), 
% 0.47/1.14    equivalent( Z, X ) ), equivalent( Z, Y ) ) ) ] )
% 0.47/1.14  .
% 0.47/1.14  clause( 11, [ 'is_a_theorem'( equivalent( X, X ) ) ] )
% 0.47/1.14  .
% 0.47/1.14  clause( 12, [ 'is_a_theorem'( T ), ~( 'is_a_theorem'( equivalent( 
% 0.47/1.14    equivalent( equivalent( equivalent( X, Y ), equivalent( Z, X ) ), 
% 0.47/1.14    equivalent( Z, Y ) ), T ) ) ) ] )
% 0.47/1.14  .
% 0.47/1.14  clause( 13, [ 'is_a_theorem'( Y ), ~( 'is_a_theorem'( equivalent( 
% 0.47/1.14    equivalent( X, X ), Y ) ) ) ] )
% 0.47/1.14  .
% 0.47/1.14  clause( 14, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, Y ), Z
% 0.47/1.14     ), equivalent( Z, equivalent( equivalent( T, Y ), equivalent( X, T ) ) )
% 0.47/1.14     ) ) ] )
% 0.47/1.14  .
% 0.47/1.14  clause( 17, [ 'is_a_theorem'( equivalent( equivalent( X, Y ), equivalent( Y
% 0.47/1.14    , X ) ) ) ] )
% 0.47/1.14  .
% 0.47/1.14  clause( 18, [ 'is_a_theorem'( Z ), ~( 'is_a_theorem'( equivalent( 
% 0.47/1.14    equivalent( equivalent( X, Y ), equivalent( Y, X ) ), Z ) ) ) ] )
% 0.47/1.14  .
% 0.47/1.14  clause( 19, [ 'is_a_theorem'( equivalent( equivalent( X, Y ), equivalent( 
% 0.47/1.14    equivalent( X, Z ), equivalent( Z, Y ) ) ) ) ] )
% 0.47/1.14  .
% 0.47/1.14  clause( 21, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, Y ), Z
% 0.47/1.14     ), equivalent( Z, equivalent( Y, X ) ) ) ) ] )
% 0.47/1.14  .
% 0.47/1.14  clause( 25, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, Y ), 
% 0.47/1.14    equivalent( Z, X ) ), equivalent( Y, Z ) ) ) ] )
% 0.47/1.14  .
% 0.47/1.14  clause( 27, [ 'is_a_theorem'( T ), ~( 'is_a_theorem'( equivalent( 
% 0.47/1.14    equivalent( equivalent( equivalent( X, Y ), equivalent( Z, X ) ), 
% 0.47/1.14    equivalent( Y, Z ) ), T ) ) ) ] )
% 0.47/1.14  .
% 0.47/1.14  clause( 48, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, Y ), 
% 0.47/1.14    equivalent( Z, X ) ), equivalent( equivalent( T, Y ), equivalent( Z, T )
% 0.47/1.14     ) ) ) ] )
% 0.47/1.14  .
% 0.47/1.14  clause( 597, [ 'is_a_theorem'( equivalent( equivalent( X, equivalent( 
% 0.47/1.14    equivalent( Y, Z ), Y ) ), equivalent( Z, X ) ) ) ] )
% 0.47/1.14  .
% 0.47/1.14  clause( 607, [ 'is_a_theorem'( equivalent( X, equivalent( equivalent( Y, Z
% 0.47/1.14     ), equivalent( equivalent( Z, X ), Y ) ) ) ) ] )
% 0.47/1.14  .
% 0.47/1.14  clause( 952, [] )
% 0.47/1.14  .
% 0.47/1.14  
% 0.47/1.14  
% 0.47/1.14  % SZS output end Refutation
% 0.47/1.14  found a proof!
% 0.47/1.14  
% 0.47/1.14  % ABCDEFGHIJKLMNOPQRSTUVWXYZ
% 0.47/1.14  
% 0.47/1.14  initialclauses(
% 0.47/1.14  [ clause( 954, [ ~( 'is_a_theorem'( equivalent( X, Y ) ) ), ~( 
% 0.47/1.14    'is_a_theorem'( X ) ), 'is_a_theorem'( Y ) ] )
% 0.47/1.14  , clause( 955, [ 'is_a_theorem'( equivalent( equivalent( X, Y ), equivalent( 
% 0.47/1.14    equivalent( Z, Y ), equivalent( X, Z ) ) ) ) ] )
% 0.47/1.14  , clause( 956, [ ~( 'is_a_theorem'( equivalent( x, equivalent( equivalent( 
% 0.47/1.14    y, z ), equivalent( equivalent( z, x ), y ) ) ) ) ) ] )
% 0.47/1.14  ] ).
% 0.47/1.14  
% 0.47/1.14  
% 0.47/1.14  
% 0.47/1.14  subsumption(
% 0.47/1.14  clause( 0, [ ~( 'is_a_theorem'( equivalent( X, Y ) ) ), 'is_a_theorem'( Y )
% 0.47/1.14    , ~( 'is_a_theorem'( X ) ) ] )
% 0.47/1.14  , clause( 954, [ ~( 'is_a_theorem'( equivalent( X, Y ) ) ), ~( 
% 0.47/1.14    'is_a_theorem'( X ) ), 'is_a_theorem'( Y ) ] )
% 0.47/1.14  , substitution( 0, [ :=( X, X ), :=( Y, Y )] ), permutation( 0, [ ==>( 0, 0
% 0.47/1.14     ), ==>( 1, 2 ), ==>( 2, 1 )] ) ).
% 0.47/1.14  
% 0.47/1.14  
% 0.47/1.14  subsumption(
% 0.47/1.14  clause( 1, [ 'is_a_theorem'( equivalent( equivalent( X, Y ), equivalent( 
% 0.47/1.14    equivalent( Z, Y ), equivalent( X, Z ) ) ) ) ] )
% 0.47/1.14  , clause( 955, [ 'is_a_theorem'( equivalent( equivalent( X, Y ), equivalent( 
% 0.47/1.14    equivalent( Z, Y ), equivalent( X, Z ) ) ) ) ] )
% 0.47/1.14  , substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z )] ), 
% 0.47/1.14    permutation( 0, [ ==>( 0, 0 )] ) ).
% 0.47/1.14  
% 0.47/1.14  
% 0.47/1.14  subsumption(
% 0.47/1.14  clause( 2, [ ~( 'is_a_theorem'( equivalent( x, equivalent( equivalent( y, z
% 0.47/1.14     ), equivalent( equivalent( z, x ), y ) ) ) ) ) ] )
% 0.47/1.14  , clause( 956, [ ~( 'is_a_theorem'( equivalent( x, equivalent( equivalent( 
% 0.47/1.14    y, z ), equivalent( equivalent( z, x ), y ) ) ) ) ) ] )
% 0.47/1.14  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 0 )] ) ).
% 0.47/1.14  
% 0.47/1.14  
% 0.47/1.14  resolution(
% 0.47/1.14  clause( 958, [ ~( 'is_a_theorem'( equivalent( equivalent( equivalent( X, Y
% 0.47/1.14     ), equivalent( equivalent( Z, Y ), equivalent( X, Z ) ) ), T ) ) ), 
% 0.47/1.14    'is_a_theorem'( T ) ] )
% 0.47/1.14  , clause( 0, [ ~( 'is_a_theorem'( equivalent( X, Y ) ) ), 'is_a_theorem'( Y
% 0.47/1.14     ), ~( 'is_a_theorem'( X ) ) ] )
% 0.47/1.14  , 2, clause( 1, [ 'is_a_theorem'( equivalent( equivalent( X, Y ), 
% 0.47/1.14    equivalent( equivalent( Z, Y ), equivalent( X, Z ) ) ) ) ] )
% 0.47/1.14  , 0, substitution( 0, [ :=( X, equivalent( equivalent( X, Y ), equivalent( 
% 0.47/1.14    equivalent( Z, Y ), equivalent( X, Z ) ) ) ), :=( Y, T )] ), 
% 0.47/1.14    substitution( 1, [ :=( X, X ), :=( Y, Y ), :=( Z, Z )] )).
% 0.47/1.14  
% 0.47/1.14  
% 0.47/1.14  subsumption(
% 0.47/1.14  clause( 3, [ 'is_a_theorem'( T ), ~( 'is_a_theorem'( equivalent( equivalent( 
% 0.47/1.14    equivalent( X, Y ), equivalent( equivalent( Z, Y ), equivalent( X, Z ) )
% 0.47/1.14     ), T ) ) ) ] )
% 0.47/1.14  , clause( 958, [ ~( 'is_a_theorem'( equivalent( equivalent( equivalent( X, 
% 0.47/1.14    Y ), equivalent( equivalent( Z, Y ), equivalent( X, Z ) ) ), T ) ) ), 
% 0.47/1.14    'is_a_theorem'( T ) ] )
% 0.47/1.14  , substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z ), :=( T, T )] ), 
% 0.47/1.14    permutation( 0, [ ==>( 0, 1 ), ==>( 1, 0 )] ) ).
% 0.47/1.14  
% 0.47/1.14  
% 0.47/1.14  resolution(
% 0.47/1.14  clause( 959, [ 'is_a_theorem'( equivalent( equivalent( X, equivalent( 
% 0.47/1.14    equivalent( Y, Z ), equivalent( T, Y ) ) ), equivalent( equivalent( T, Z
% 0.47/1.14     ), X ) ) ) ] )
% 0.47/1.14  , clause( 3, [ 'is_a_theorem'( T ), ~( 'is_a_theorem'( equivalent( 
% 0.47/1.14    equivalent( equivalent( X, Y ), equivalent( equivalent( Z, Y ), 
% 0.47/1.14    equivalent( X, Z ) ) ), T ) ) ) ] )
% 0.47/1.14  , 1, clause( 1, [ 'is_a_theorem'( equivalent( equivalent( X, Y ), 
% 0.47/1.14    equivalent( equivalent( Z, Y ), equivalent( X, Z ) ) ) ) ] )
% 0.47/1.14  , 0, substitution( 0, [ :=( X, T ), :=( Y, Z ), :=( Z, Y ), :=( T, 
% 0.47/1.14    equivalent( equivalent( X, equivalent( equivalent( Y, Z ), equivalent( T
% 0.47/1.14    , Y ) ) ), equivalent( equivalent( T, Z ), X ) ) )] ), substitution( 1, [
% 0.47/1.14     :=( X, equivalent( T, Z ) ), :=( Y, equivalent( equivalent( Y, Z ), 
% 0.47/1.14    equivalent( T, Y ) ) ), :=( Z, X )] )).
% 0.47/1.14  
% 0.47/1.14  
% 0.47/1.14  subsumption(
% 0.47/1.14  clause( 4, [ 'is_a_theorem'( equivalent( equivalent( X, equivalent( 
% 0.47/1.14    equivalent( Y, Z ), equivalent( T, Y ) ) ), equivalent( equivalent( T, Z
% 0.47/1.14     ), X ) ) ) ] )
% 0.47/1.14  , clause( 959, [ 'is_a_theorem'( equivalent( equivalent( X, equivalent( 
% 0.47/1.14    equivalent( Y, Z ), equivalent( T, Y ) ) ), equivalent( equivalent( T, Z
% 0.47/1.14     ), X ) ) ) ] )
% 0.47/1.14  , substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z ), :=( T, T )] ), 
% 0.47/1.14    permutation( 0, [ ==>( 0, 0 )] ) ).
% 0.47/1.14  
% 0.47/1.14  
% 0.47/1.14  resolution(
% 0.47/1.14  clause( 960, [ 'is_a_theorem'( equivalent( equivalent( X, Y ), equivalent( 
% 0.47/1.14    X, Y ) ) ) ] )
% 0.47/1.14  , clause( 3, [ 'is_a_theorem'( T ), ~( 'is_a_theorem'( equivalent( 
% 0.47/1.14    equivalent( equivalent( X, Y ), equivalent( equivalent( Z, Y ), 
% 0.47/1.14    equivalent( X, Z ) ) ), T ) ) ) ] )
% 0.47/1.14  , 1, clause( 4, [ 'is_a_theorem'( equivalent( equivalent( X, equivalent( 
% 0.47/1.14    equivalent( Y, Z ), equivalent( T, Y ) ) ), equivalent( equivalent( T, Z
% 0.47/1.14     ), X ) ) ) ] )
% 0.47/1.14  , 0, substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z ), :=( T, 
% 0.47/1.14    equivalent( equivalent( X, Y ), equivalent( X, Y ) ) )] ), substitution( 
% 0.47/1.14    1, [ :=( X, equivalent( X, Y ) ), :=( Y, Z ), :=( Z, Y ), :=( T, X )] )
% 0.47/1.14    ).
% 0.47/1.14  
% 0.47/1.14  
% 0.47/1.14  subsumption(
% 0.47/1.14  clause( 5, [ 'is_a_theorem'( equivalent( equivalent( X, Y ), equivalent( X
% 0.47/1.14    , Y ) ) ) ] )
% 0.47/1.14  , clause( 960, [ 'is_a_theorem'( equivalent( equivalent( X, Y ), equivalent( 
% 0.47/1.14    X, Y ) ) ) ] )
% 0.47/1.14  , substitution( 0, [ :=( X, X ), :=( Y, Y )] ), permutation( 0, [ ==>( 0, 0
% 0.47/1.14     )] ) ).
% 0.47/1.14  
% 0.47/1.14  
% 0.47/1.14  resolution(
% 0.47/1.14  clause( 962, [ ~( 'is_a_theorem'( equivalent( equivalent( equivalent( X, 
% 0.47/1.14    equivalent( equivalent( Y, Z ), equivalent( T, Y ) ) ), equivalent( 
% 0.47/1.14    equivalent( T, Z ), X ) ), U ) ) ), 'is_a_theorem'( U ) ] )
% 0.47/1.14  , clause( 0, [ ~( 'is_a_theorem'( equivalent( X, Y ) ) ), 'is_a_theorem'( Y
% 0.47/1.14     ), ~( 'is_a_theorem'( X ) ) ] )
% 0.47/1.14  , 2, clause( 4, [ 'is_a_theorem'( equivalent( equivalent( X, equivalent( 
% 0.47/1.14    equivalent( Y, Z ), equivalent( T, Y ) ) ), equivalent( equivalent( T, Z
% 0.47/1.14     ), X ) ) ) ] )
% 0.47/1.14  , 0, substitution( 0, [ :=( X, equivalent( equivalent( X, equivalent( 
% 0.47/1.14    equivalent( Y, Z ), equivalent( T, Y ) ) ), equivalent( equivalent( T, Z
% 0.47/1.14     ), X ) ) ), :=( Y, U )] ), substitution( 1, [ :=( X, X ), :=( Y, Y ), 
% 0.47/1.14    :=( Z, Z ), :=( T, T )] )).
% 0.47/1.14  
% 0.47/1.14  
% 0.47/1.14  subsumption(
% 0.47/1.14  clause( 6, [ 'is_a_theorem'( U ), ~( 'is_a_theorem'( equivalent( equivalent( 
% 0.47/1.14    equivalent( X, equivalent( equivalent( Y, Z ), equivalent( T, Y ) ) ), 
% 0.47/1.14    equivalent( equivalent( T, Z ), X ) ), U ) ) ) ] )
% 0.47/1.14  , clause( 962, [ ~( 'is_a_theorem'( equivalent( equivalent( equivalent( X, 
% 0.47/1.14    equivalent( equivalent( Y, Z ), equivalent( T, Y ) ) ), equivalent( 
% 0.47/1.14    equivalent( T, Z ), X ) ), U ) ) ), 'is_a_theorem'( U ) ] )
% 0.47/1.14  , substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z ), :=( T, T ), :=( U
% 0.47/1.14    , U )] ), permutation( 0, [ ==>( 0, 1 ), ==>( 1, 0 )] ) ).
% 0.47/1.14  
% 0.47/1.14  
% 0.47/1.14  resolution(
% 0.47/1.14  clause( 964, [ ~( 'is_a_theorem'( equivalent( equivalent( equivalent( X, Y
% 0.47/1.14     ), equivalent( X, Y ) ), Z ) ) ), 'is_a_theorem'( Z ) ] )
% 0.47/1.14  , clause( 0, [ ~( 'is_a_theorem'( equivalent( X, Y ) ) ), 'is_a_theorem'( Y
% 0.47/1.14     ), ~( 'is_a_theorem'( X ) ) ] )
% 0.47/1.14  , 2, clause( 5, [ 'is_a_theorem'( equivalent( equivalent( X, Y ), 
% 0.47/1.14    equivalent( X, Y ) ) ) ] )
% 0.47/1.14  , 0, substitution( 0, [ :=( X, equivalent( equivalent( X, Y ), equivalent( 
% 0.47/1.14    X, Y ) ) ), :=( Y, Z )] ), substitution( 1, [ :=( X, X ), :=( Y, Y )] )
% 0.47/1.14    ).
% 0.47/1.14  
% 0.47/1.14  
% 0.47/1.14  subsumption(
% 0.47/1.14  clause( 7, [ 'is_a_theorem'( Z ), ~( 'is_a_theorem'( equivalent( equivalent( 
% 0.47/1.14    equivalent( X, Y ), equivalent( X, Y ) ), Z ) ) ) ] )
% 0.47/1.14  , clause( 964, [ ~( 'is_a_theorem'( equivalent( equivalent( equivalent( X, 
% 0.47/1.14    Y ), equivalent( X, Y ) ), Z ) ) ), 'is_a_theorem'( Z ) ] )
% 0.47/1.14  , substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z )] ), 
% 0.47/1.14    permutation( 0, [ ==>( 0, 1 ), ==>( 1, 0 )] ) ).
% 0.47/1.14  
% 0.47/1.14  
% 0.47/1.14  resolution(
% 0.47/1.14  clause( 965, [ 'is_a_theorem'( equivalent( equivalent( X, equivalent( Y, Z
% 0.47/1.14     ) ), equivalent( equivalent( Y, Z ), X ) ) ) ] )
% 0.47/1.14  , clause( 7, [ 'is_a_theorem'( Z ), ~( 'is_a_theorem'( equivalent( 
% 0.47/1.14    equivalent( equivalent( X, Y ), equivalent( X, Y ) ), Z ) ) ) ] )
% 0.47/1.14  , 1, clause( 1, [ 'is_a_theorem'( equivalent( equivalent( X, Y ), 
% 0.47/1.14    equivalent( equivalent( Z, Y ), equivalent( X, Z ) ) ) ) ] )
% 0.47/1.14  , 0, substitution( 0, [ :=( X, Y ), :=( Y, Z ), :=( Z, equivalent( 
% 0.47/1.14    equivalent( X, equivalent( Y, Z ) ), equivalent( equivalent( Y, Z ), X )
% 0.47/1.14     ) )] ), substitution( 1, [ :=( X, equivalent( Y, Z ) ), :=( Y, 
% 0.47/1.14    equivalent( Y, Z ) ), :=( Z, X )] )).
% 0.47/1.14  
% 0.47/1.14  
% 0.47/1.14  subsumption(
% 0.47/1.14  clause( 8, [ 'is_a_theorem'( equivalent( equivalent( X, equivalent( Y, Z )
% 0.47/1.14     ), equivalent( equivalent( Y, Z ), X ) ) ) ] )
% 0.47/1.14  , clause( 965, [ 'is_a_theorem'( equivalent( equivalent( X, equivalent( Y, 
% 0.47/1.14    Z ) ), equivalent( equivalent( Y, Z ), X ) ) ) ] )
% 0.47/1.14  , substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z )] ), 
% 0.47/1.14    permutation( 0, [ ==>( 0, 0 )] ) ).
% 0.47/1.14  
% 0.47/1.14  
% 0.47/1.14  resolution(
% 0.47/1.14  clause( 966, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, Y ), 
% 0.47/1.14    equivalent( Z, X ) ), equivalent( Z, Y ) ) ) ] )
% 0.47/1.14  , clause( 3, [ 'is_a_theorem'( T ), ~( 'is_a_theorem'( equivalent( 
% 0.47/1.14    equivalent( equivalent( X, Y ), equivalent( equivalent( Z, Y ), 
% 0.47/1.14    equivalent( X, Z ) ) ), T ) ) ) ] )
% 0.47/1.14  , 1, clause( 8, [ 'is_a_theorem'( equivalent( equivalent( X, equivalent( Y
% 0.47/1.14    , Z ) ), equivalent( equivalent( Y, Z ), X ) ) ) ] )
% 0.47/1.14  , 0, substitution( 0, [ :=( X, Z ), :=( Y, Y ), :=( Z, X ), :=( T, 
% 0.47/1.14    equivalent( equivalent( equivalent( X, Y ), equivalent( Z, X ) ), 
% 0.47/1.14    equivalent( Z, Y ) ) )] ), substitution( 1, [ :=( X, equivalent( Z, Y ) )
% 0.47/1.14    , :=( Y, equivalent( X, Y ) ), :=( Z, equivalent( Z, X ) )] )).
% 0.47/1.14  
% 0.47/1.14  
% 0.47/1.14  subsumption(
% 0.47/1.14  clause( 9, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, Y ), 
% 0.47/1.14    equivalent( Z, X ) ), equivalent( Z, Y ) ) ) ] )
% 0.47/1.14  , clause( 966, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, Y )
% 0.47/1.14    , equivalent( Z, X ) ), equivalent( Z, Y ) ) ) ] )
% 0.47/1.14  , substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z )] ), 
% 0.47/1.14    permutation( 0, [ ==>( 0, 0 )] ) ).
% 0.47/1.14  
% 0.47/1.14  
% 0.47/1.14  resolution(
% 0.47/1.14  clause( 967, [ 'is_a_theorem'( equivalent( X, X ) ) ] )
% 0.47/1.14  , clause( 7, [ 'is_a_theorem'( Z ), ~( 'is_a_theorem'( equivalent( 
% 0.47/1.14    equivalent( equivalent( X, Y ), equivalent( X, Y ) ), Z ) ) ) ] )
% 0.47/1.14  , 1, clause( 9, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, Y
% 0.47/1.14     ), equivalent( Z, X ) ), equivalent( Z, Y ) ) ) ] )
% 0.47/1.14  , 0, substitution( 0, [ :=( X, X ), :=( Y, X ), :=( Z, equivalent( X, X ) )] )
% 0.47/1.14    , substitution( 1, [ :=( X, X ), :=( Y, X ), :=( Z, X )] )).
% 0.47/1.14  
% 0.47/1.14  
% 0.47/1.14  subsumption(
% 0.47/1.14  clause( 11, [ 'is_a_theorem'( equivalent( X, X ) ) ] )
% 0.47/1.14  , clause( 967, [ 'is_a_theorem'( equivalent( X, X ) ) ] )
% 0.47/1.14  , substitution( 0, [ :=( X, X )] ), permutation( 0, [ ==>( 0, 0 )] ) ).
% 0.47/1.14  
% 0.47/1.14  
% 0.47/1.14  resolution(
% 0.47/1.14  clause( 969, [ ~( 'is_a_theorem'( equivalent( equivalent( equivalent( 
% 0.47/1.14    equivalent( X, Y ), equivalent( Z, X ) ), equivalent( Z, Y ) ), T ) ) ), 
% 0.47/1.14    'is_a_theorem'( T ) ] )
% 0.47/1.14  , clause( 0, [ ~( 'is_a_theorem'( equivalent( X, Y ) ) ), 'is_a_theorem'( Y
% 0.47/1.14     ), ~( 'is_a_theorem'( X ) ) ] )
% 0.47/1.14  , 2, clause( 9, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, Y
% 0.47/1.14     ), equivalent( Z, X ) ), equivalent( Z, Y ) ) ) ] )
% 0.47/1.14  , 0, substitution( 0, [ :=( X, equivalent( equivalent( equivalent( X, Y ), 
% 0.47/1.14    equivalent( Z, X ) ), equivalent( Z, Y ) ) ), :=( Y, T )] ), 
% 0.47/1.14    substitution( 1, [ :=( X, X ), :=( Y, Y ), :=( Z, Z )] )).
% 0.47/1.14  
% 0.47/1.14  
% 0.47/1.14  subsumption(
% 0.47/1.14  clause( 12, [ 'is_a_theorem'( T ), ~( 'is_a_theorem'( equivalent( 
% 0.47/1.14    equivalent( equivalent( equivalent( X, Y ), equivalent( Z, X ) ), 
% 0.47/1.14    equivalent( Z, Y ) ), T ) ) ) ] )
% 0.47/1.14  , clause( 969, [ ~( 'is_a_theorem'( equivalent( equivalent( equivalent( 
% 0.47/1.14    equivalent( X, Y ), equivalent( Z, X ) ), equivalent( Z, Y ) ), T ) ) ), 
% 0.47/1.14    'is_a_theorem'( T ) ] )
% 0.47/1.14  , substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z ), :=( T, T )] ), 
% 0.47/1.14    permutation( 0, [ ==>( 0, 1 ), ==>( 1, 0 )] ) ).
% 0.47/1.14  
% 0.47/1.14  
% 0.47/1.14  resolution(
% 0.47/1.14  clause( 971, [ ~( 'is_a_theorem'( equivalent( equivalent( X, X ), Y ) ) ), 
% 0.47/1.14    'is_a_theorem'( Y ) ] )
% 0.47/1.14  , clause( 0, [ ~( 'is_a_theorem'( equivalent( X, Y ) ) ), 'is_a_theorem'( Y
% 0.47/1.14     ), ~( 'is_a_theorem'( X ) ) ] )
% 0.47/1.14  , 2, clause( 11, [ 'is_a_theorem'( equivalent( X, X ) ) ] )
% 0.47/1.14  , 0, substitution( 0, [ :=( X, equivalent( X, X ) ), :=( Y, Y )] ), 
% 0.47/1.14    substitution( 1, [ :=( X, X )] )).
% 0.47/1.14  
% 0.47/1.14  
% 0.47/1.14  subsumption(
% 0.47/1.14  clause( 13, [ 'is_a_theorem'( Y ), ~( 'is_a_theorem'( equivalent( 
% 0.47/1.14    equivalent( X, X ), Y ) ) ) ] )
% 0.47/1.14  , clause( 971, [ ~( 'is_a_theorem'( equivalent( equivalent( X, X ), Y ) ) )
% 0.47/1.14    , 'is_a_theorem'( Y ) ] )
% 0.47/1.14  , substitution( 0, [ :=( X, X ), :=( Y, Y )] ), permutation( 0, [ ==>( 0, 1
% 0.47/1.14     ), ==>( 1, 0 )] ) ).
% 0.47/1.14  
% 0.47/1.14  
% 0.47/1.14  resolution(
% 0.47/1.14  clause( 972, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, Y ), 
% 0.47/1.14    Z ), equivalent( Z, equivalent( equivalent( T, Y ), equivalent( X, T ) )
% 0.47/1.14     ) ) ) ] )
% 0.47/1.14  , clause( 6, [ 'is_a_theorem'( U ), ~( 'is_a_theorem'( equivalent( 
% 0.47/1.14    equivalent( equivalent( X, equivalent( equivalent( Y, Z ), equivalent( T
% 0.47/1.14    , Y ) ) ), equivalent( equivalent( T, Z ), X ) ), U ) ) ) ] )
% 0.47/1.14  , 1, clause( 8, [ 'is_a_theorem'( equivalent( equivalent( X, equivalent( Y
% 0.47/1.14    , Z ) ), equivalent( equivalent( Y, Z ), X ) ) ) ] )
% 0.47/1.14  , 0, substitution( 0, [ :=( X, Z ), :=( Y, T ), :=( Z, Y ), :=( T, X ), 
% 0.47/1.14    :=( U, equivalent( equivalent( equivalent( X, Y ), Z ), equivalent( Z, 
% 0.47/1.14    equivalent( equivalent( T, Y ), equivalent( X, T ) ) ) ) )] ), 
% 0.47/1.14    substitution( 1, [ :=( X, equivalent( Z, equivalent( equivalent( T, Y ), 
% 0.47/1.14    equivalent( X, T ) ) ) ), :=( Y, equivalent( X, Y ) ), :=( Z, Z )] )).
% 0.47/1.14  
% 0.47/1.14  
% 0.47/1.14  subsumption(
% 0.47/1.14  clause( 14, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, Y ), Z
% 0.47/1.14     ), equivalent( Z, equivalent( equivalent( T, Y ), equivalent( X, T ) ) )
% 0.47/1.14     ) ) ] )
% 0.47/1.14  , clause( 972, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, Y )
% 0.47/1.14    , Z ), equivalent( Z, equivalent( equivalent( T, Y ), equivalent( X, T )
% 0.47/1.14     ) ) ) ) ] )
% 0.47/1.14  , substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z ), :=( T, T )] ), 
% 0.47/1.14    permutation( 0, [ ==>( 0, 0 )] ) ).
% 0.47/1.14  
% 0.47/1.14  
% 0.47/1.14  resolution(
% 0.47/1.14  clause( 973, [ 'is_a_theorem'( equivalent( equivalent( X, Y ), equivalent( 
% 0.47/1.14    Y, X ) ) ) ] )
% 0.47/1.14  , clause( 13, [ 'is_a_theorem'( Y ), ~( 'is_a_theorem'( equivalent( 
% 0.47/1.14    equivalent( X, X ), Y ) ) ) ] )
% 0.47/1.14  , 1, clause( 1, [ 'is_a_theorem'( equivalent( equivalent( X, Y ), 
% 0.47/1.14    equivalent( equivalent( Z, Y ), equivalent( X, Z ) ) ) ) ] )
% 0.47/1.14  , 0, substitution( 0, [ :=( X, Y ), :=( Y, equivalent( equivalent( X, Y ), 
% 0.47/1.14    equivalent( Y, X ) ) )] ), substitution( 1, [ :=( X, Y ), :=( Y, Y ), 
% 0.47/1.14    :=( Z, X )] )).
% 0.47/1.14  
% 0.47/1.14  
% 0.47/1.14  subsumption(
% 0.47/1.14  clause( 17, [ 'is_a_theorem'( equivalent( equivalent( X, Y ), equivalent( Y
% 0.47/1.14    , X ) ) ) ] )
% 0.47/1.14  , clause( 973, [ 'is_a_theorem'( equivalent( equivalent( X, Y ), equivalent( 
% 0.47/1.14    Y, X ) ) ) ] )
% 0.47/1.14  , substitution( 0, [ :=( X, X ), :=( Y, Y )] ), permutation( 0, [ ==>( 0, 0
% 0.47/1.14     )] ) ).
% 0.47/1.14  
% 0.47/1.14  
% 0.47/1.14  resolution(
% 0.47/1.14  clause( 975, [ ~( 'is_a_theorem'( equivalent( equivalent( equivalent( X, Y
% 0.47/1.14     ), equivalent( Y, X ) ), Z ) ) ), 'is_a_theorem'( Z ) ] )
% 0.47/1.14  , clause( 0, [ ~( 'is_a_theorem'( equivalent( X, Y ) ) ), 'is_a_theorem'( Y
% 0.47/1.14     ), ~( 'is_a_theorem'( X ) ) ] )
% 0.47/1.14  , 2, clause( 17, [ 'is_a_theorem'( equivalent( equivalent( X, Y ), 
% 0.47/1.14    equivalent( Y, X ) ) ) ] )
% 0.47/1.14  , 0, substitution( 0, [ :=( X, equivalent( equivalent( X, Y ), equivalent( 
% 0.47/1.14    Y, X ) ) ), :=( Y, Z )] ), substitution( 1, [ :=( X, X ), :=( Y, Y )] )
% 0.47/1.14    ).
% 0.47/1.14  
% 0.47/1.14  
% 0.47/1.14  subsumption(
% 0.47/1.14  clause( 18, [ 'is_a_theorem'( Z ), ~( 'is_a_theorem'( equivalent( 
% 0.47/1.14    equivalent( equivalent( X, Y ), equivalent( Y, X ) ), Z ) ) ) ] )
% 0.47/1.14  , clause( 975, [ ~( 'is_a_theorem'( equivalent( equivalent( equivalent( X, 
% 0.47/1.14    Y ), equivalent( Y, X ) ), Z ) ) ), 'is_a_theorem'( Z ) ] )
% 0.47/1.14  , substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z )] ), 
% 0.47/1.14    permutation( 0, [ ==>( 0, 1 ), ==>( 1, 0 )] ) ).
% 0.47/1.14  
% 0.47/1.14  
% 0.47/1.14  resolution(
% 0.47/1.14  clause( 976, [ 'is_a_theorem'( equivalent( equivalent( X, Y ), equivalent( 
% 0.47/1.14    equivalent( X, Z ), equivalent( Z, Y ) ) ) ) ] )
% 0.47/1.14  , clause( 18, [ 'is_a_theorem'( Z ), ~( 'is_a_theorem'( equivalent( 
% 0.47/1.14    equivalent( equivalent( X, Y ), equivalent( Y, X ) ), Z ) ) ) ] )
% 0.47/1.14  , 1, clause( 4, [ 'is_a_theorem'( equivalent( equivalent( X, equivalent( 
% 0.47/1.14    equivalent( Y, Z ), equivalent( T, Y ) ) ), equivalent( equivalent( T, Z
% 0.47/1.14     ), X ) ) ) ] )
% 0.47/1.14  , 0, substitution( 0, [ :=( X, equivalent( X, Z ) ), :=( Y, equivalent( Z, 
% 0.47/1.14    Y ) ), :=( Z, equivalent( equivalent( X, Y ), equivalent( equivalent( X, 
% 0.47/1.14    Z ), equivalent( Z, Y ) ) ) )] ), substitution( 1, [ :=( X, equivalent( 
% 0.47/1.14    equivalent( X, Z ), equivalent( Z, Y ) ) ), :=( Y, Z ), :=( Z, Y ), :=( T
% 0.47/1.14    , X )] )).
% 0.47/1.14  
% 0.47/1.14  
% 0.47/1.14  subsumption(
% 0.47/1.14  clause( 19, [ 'is_a_theorem'( equivalent( equivalent( X, Y ), equivalent( 
% 0.47/1.14    equivalent( X, Z ), equivalent( Z, Y ) ) ) ) ] )
% 0.47/1.14  , clause( 976, [ 'is_a_theorem'( equivalent( equivalent( X, Y ), equivalent( 
% 0.47/1.14    equivalent( X, Z ), equivalent( Z, Y ) ) ) ) ] )
% 0.47/1.14  , substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z )] ), 
% 0.47/1.14    permutation( 0, [ ==>( 0, 0 )] ) ).
% 0.47/1.14  
% 0.47/1.14  
% 0.47/1.14  resolution(
% 0.47/1.14  clause( 977, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, Y ), 
% 0.47/1.14    Z ), equivalent( Z, equivalent( Y, X ) ) ) ) ] )
% 0.47/1.14  , clause( 18, [ 'is_a_theorem'( Z ), ~( 'is_a_theorem'( equivalent( 
% 0.47/1.14    equivalent( equivalent( X, Y ), equivalent( Y, X ) ), Z ) ) ) ] )
% 0.47/1.14  , 1, clause( 19, [ 'is_a_theorem'( equivalent( equivalent( X, Y ), 
% 0.47/1.14    equivalent( equivalent( X, Z ), equivalent( Z, Y ) ) ) ) ] )
% 0.47/1.14  , 0, substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, equivalent( 
% 0.47/1.14    equivalent( equivalent( X, Y ), Z ), equivalent( Z, equivalent( Y, X ) )
% 0.47/1.14     ) )] ), substitution( 1, [ :=( X, equivalent( X, Y ) ), :=( Y, 
% 0.47/1.14    equivalent( Y, X ) ), :=( Z, Z )] )).
% 0.47/1.14  
% 0.47/1.14  
% 0.47/1.14  subsumption(
% 0.47/1.14  clause( 21, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, Y ), Z
% 0.47/1.14     ), equivalent( Z, equivalent( Y, X ) ) ) ) ] )
% 0.47/1.14  , clause( 977, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, Y )
% 0.47/1.14    , Z ), equivalent( Z, equivalent( Y, X ) ) ) ) ] )
% 0.47/1.14  , substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z )] ), 
% 0.47/1.14    permutation( 0, [ ==>( 0, 0 )] ) ).
% 0.47/1.14  
% 0.47/1.14  
% 0.47/1.14  resolution(
% 0.47/1.14  clause( 978, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, Y ), 
% 0.47/1.14    equivalent( Z, X ) ), equivalent( Y, Z ) ) ) ] )
% 0.47/1.14  , clause( 3, [ 'is_a_theorem'( T ), ~( 'is_a_theorem'( equivalent( 
% 0.47/1.14    equivalent( equivalent( X, Y ), equivalent( equivalent( Z, Y ), 
% 0.47/1.14    equivalent( X, Z ) ) ), T ) ) ) ] )
% 0.47/1.14  , 1, clause( 21, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, Y
% 0.47/1.14     ), Z ), equivalent( Z, equivalent( Y, X ) ) ) ) ] )
% 0.47/1.14  , 0, substitution( 0, [ :=( X, Z ), :=( Y, Y ), :=( Z, X ), :=( T, 
% 0.47/1.14    equivalent( equivalent( equivalent( X, Y ), equivalent( Z, X ) ), 
% 0.47/1.14    equivalent( Y, Z ) ) )] ), substitution( 1, [ :=( X, Z ), :=( Y, Y ), 
% 0.47/1.14    :=( Z, equivalent( equivalent( X, Y ), equivalent( Z, X ) ) )] )).
% 0.47/1.14  
% 0.47/1.14  
% 0.47/1.14  subsumption(
% 0.47/1.14  clause( 25, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, Y ), 
% 0.47/1.14    equivalent( Z, X ) ), equivalent( Y, Z ) ) ) ] )
% 0.47/1.14  , clause( 978, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, Y )
% 0.47/1.14    , equivalent( Z, X ) ), equivalent( Y, Z ) ) ) ] )
% 0.47/1.14  , substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z )] ), 
% 0.47/1.14    permutation( 0, [ ==>( 0, 0 )] ) ).
% 0.47/1.14  
% 0.47/1.14  
% 0.47/1.14  resolution(
% 0.47/1.14  clause( 980, [ ~( 'is_a_theorem'( equivalent( equivalent( equivalent( 
% 0.47/1.14    equivalent( X, Y ), equivalent( Z, X ) ), equivalent( Y, Z ) ), T ) ) ), 
% 0.47/1.14    'is_a_theorem'( T ) ] )
% 0.47/1.14  , clause( 0, [ ~( 'is_a_theorem'( equivalent( X, Y ) ) ), 'is_a_theorem'( Y
% 0.47/1.14     ), ~( 'is_a_theorem'( X ) ) ] )
% 0.47/1.14  , 2, clause( 25, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, Y
% 0.47/1.14     ), equivalent( Z, X ) ), equivalent( Y, Z ) ) ) ] )
% 0.47/1.14  , 0, substitution( 0, [ :=( X, equivalent( equivalent( equivalent( X, Y ), 
% 0.47/1.14    equivalent( Z, X ) ), equivalent( Y, Z ) ) ), :=( Y, T )] ), 
% 0.47/1.14    substitution( 1, [ :=( X, X ), :=( Y, Y ), :=( Z, Z )] )).
% 0.47/1.14  
% 0.47/1.14  
% 0.47/1.14  subsumption(
% 0.47/1.14  clause( 27, [ 'is_a_theorem'( T ), ~( 'is_a_theorem'( equivalent( 
% 0.47/1.14    equivalent( equivalent( equivalent( X, Y ), equivalent( Z, X ) ), 
% 0.47/1.14    equivalent( Y, Z ) ), T ) ) ) ] )
% 0.47/1.14  , clause( 980, [ ~( 'is_a_theorem'( equivalent( equivalent( equivalent( 
% 0.47/1.14    equivalent( X, Y ), equivalent( Z, X ) ), equivalent( Y, Z ) ), T ) ) ), 
% 0.47/1.14    'is_a_theorem'( T ) ] )
% 0.47/1.14  , substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z ), :=( T, T )] ), 
% 0.47/1.14    permutation( 0, [ ==>( 0, 1 ), ==>( 1, 0 )] ) ).
% 0.47/1.14  
% 0.47/1.14  
% 0.47/1.14  resolution(
% 0.47/1.14  clause( 981, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, Y ), 
% 0.47/1.14    equivalent( Z, X ) ), equivalent( equivalent( T, Y ), equivalent( Z, T )
% 0.47/1.14     ) ) ) ] )
% 0.47/1.14  , clause( 3, [ 'is_a_theorem'( T ), ~( 'is_a_theorem'( equivalent( 
% 0.47/1.14    equivalent( equivalent( X, Y ), equivalent( equivalent( Z, Y ), 
% 0.47/1.14    equivalent( X, Z ) ) ), T ) ) ) ] )
% 0.47/1.14  , 1, clause( 14, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, Y
% 0.47/1.14     ), Z ), equivalent( Z, equivalent( equivalent( T, Y ), equivalent( X, T
% 0.47/1.14     ) ) ) ) ) ] )
% 0.47/1.14  , 0, substitution( 0, [ :=( X, Z ), :=( Y, Y ), :=( Z, X ), :=( T, 
% 0.47/1.14    equivalent( equivalent( equivalent( X, Y ), equivalent( Z, X ) ), 
% 0.47/1.14    equivalent( equivalent( T, Y ), equivalent( Z, T ) ) ) )] ), 
% 0.47/1.14    substitution( 1, [ :=( X, Z ), :=( Y, Y ), :=( Z, equivalent( equivalent( 
% 0.47/1.14    X, Y ), equivalent( Z, X ) ) ), :=( T, T )] )).
% 0.47/1.14  
% 0.47/1.14  
% 0.47/1.14  subsumption(
% 0.47/1.14  clause( 48, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, Y ), 
% 0.47/1.14    equivalent( Z, X ) ), equivalent( equivalent( T, Y ), equivalent( Z, T )
% 0.47/1.14     ) ) ) ] )
% 0.47/1.14  , clause( 981, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, Y )
% 0.47/1.14    , equivalent( Z, X ) ), equivalent( equivalent( T, Y ), equivalent( Z, T
% 0.47/1.14     ) ) ) ) ] )
% 0.47/1.14  , substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z ), :=( T, T )] ), 
% 0.47/1.14    permutation( 0, [ ==>( 0, 0 )] ) ).
% 0.47/1.14  
% 0.47/1.14  
% 0.47/1.14  resolution(
% 0.47/1.14  clause( 982, [ 'is_a_theorem'( equivalent( equivalent( X, equivalent( 
% 0.47/1.14    equivalent( Y, Z ), Y ) ), equivalent( Z, X ) ) ) ] )
% 0.47/1.14  , clause( 27, [ 'is_a_theorem'( T ), ~( 'is_a_theorem'( equivalent( 
% 0.47/1.14    equivalent( equivalent( equivalent( X, Y ), equivalent( Z, X ) ), 
% 0.47/1.14    equivalent( Y, Z ) ), T ) ) ) ] )
% 0.47/1.14  , 1, clause( 48, [ 'is_a_theorem'( equivalent( equivalent( equivalent( X, Y
% 0.47/1.14     ), equivalent( Z, X ) ), equivalent( equivalent( T, Y ), equivalent( Z, 
% 0.47/1.14    T ) ) ) ) ] )
% 0.47/1.14  , 0, substitution( 0, [ :=( X, Y ), :=( Y, Z ), :=( Z, equivalent( Y, Z ) )
% 0.47/1.14    , :=( T, equivalent( equivalent( X, equivalent( equivalent( Y, Z ), Y ) )
% 0.47/1.14    , equivalent( Z, X ) ) )] ), substitution( 1, [ :=( X, equivalent( Y, Z )
% 0.47/1.14     ), :=( Y, equivalent( equivalent( Y, Z ), Y ) ), :=( Z, Z ), :=( T, X )] )
% 0.47/1.14    ).
% 0.47/1.14  
% 0.47/1.14  
% 0.47/1.14  subsumption(
% 0.47/1.14  clause( 597, [ 'is_a_theorem'( equivalent( equivalent( X, equivalent( 
% 0.47/1.14    equivalent( Y, Z ), Y ) ), equivalent( Z, X ) ) ) ] )
% 0.47/1.14  , clause( 982, [ 'is_a_theorem'( equivalent( equivalent( X, equivalent( 
% 0.47/1.14    equivalent( Y, Z ), Y ) ), equivalent( Z, X ) ) ) ] )
% 0.47/1.14  , substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z )] ), 
% 0.47/1.14    permutation( 0, [ ==>( 0, 0 )] ) ).
% 0.47/1.14  
% 0.47/1.14  
% 0.47/1.14  resolution(
% 0.47/1.14  clause( 983, [ 'is_a_theorem'( equivalent( X, equivalent( equivalent( Y, Z
% 0.47/1.14     ), equivalent( equivalent( Z, X ), Y ) ) ) ) ] )
% 0.47/1.14  , clause( 12, [ 'is_a_theorem'( T ), ~( 'is_a_theorem'( equivalent( 
% 0.47/1.14    equivalent( equivalent( equivalent( X, Y ), equivalent( Z, X ) ), 
% 0.47/1.14    equivalent( Z, Y ) ), T ) ) ) ] )
% 0.47/1.14  , 1, clause( 597, [ 'is_a_theorem'( equivalent( equivalent( X, equivalent( 
% 0.47/1.14    equivalent( Y, Z ), Y ) ), equivalent( Z, X ) ) ) ] )
% 0.47/1.14  , 0, substitution( 0, [ :=( X, Y ), :=( Y, Z ), :=( Z, equivalent( Z, X ) )
% 0.47/1.14    , :=( T, equivalent( X, equivalent( equivalent( Y, Z ), equivalent( 
% 0.47/1.14    equivalent( Z, X ), Y ) ) ) )] ), substitution( 1, [ :=( X, equivalent( 
% 0.47/1.14    equivalent( Y, Z ), equivalent( equivalent( Z, X ), Y ) ) ), :=( Y, Z ), 
% 0.47/1.14    :=( Z, X )] )).
% 0.47/1.14  
% 0.47/1.14  
% 0.47/1.14  subsumption(
% 0.47/1.14  clause( 607, [ 'is_a_theorem'( equivalent( X, equivalent( equivalent( Y, Z
% 0.47/1.14     ), equivalent( equivalent( Z, X ), Y ) ) ) ) ] )
% 0.47/1.14  , clause( 983, [ 'is_a_theorem'( equivalent( X, equivalent( equivalent( Y, 
% 0.47/1.14    Z ), equivalent( equivalent( Z, X ), Y ) ) ) ) ] )
% 0.47/1.14  , substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z )] ), 
% 0.47/1.14    permutation( 0, [ ==>( 0, 0 )] ) ).
% 0.47/1.14  
% 0.47/1.14  
% 0.47/1.14  resolution(
% 0.47/1.14  clause( 984, [] )
% 0.47/1.14  , clause( 2, [ ~( 'is_a_theorem'( equivalent( x, equivalent( equivalent( y
% 0.47/1.14    , z ), equivalent( equivalent( z, x ), y ) ) ) ) ) ] )
% 0.47/1.14  , 0, clause( 607, [ 'is_a_theorem'( equivalent( X, equivalent( equivalent( 
% 0.47/1.14    Y, Z ), equivalent( equivalent( Z, X ), Y ) ) ) ) ] )
% 0.47/1.14  , 0, substitution( 0, [] ), substitution( 1, [ :=( X, x ), :=( Y, y ), :=( 
% 0.47/1.14    Z, z )] )).
% 0.47/1.14  
% 0.47/1.14  
% 0.47/1.14  subsumption(
% 0.47/1.14  clause( 952, [] )
% 0.47/1.14  , clause( 984, [] )
% 0.47/1.14  , substitution( 0, [] ), permutation( 0, [] ) ).
% 0.47/1.14  
% 0.47/1.14  
% 0.47/1.14  end.
% 0.47/1.14  
% 0.47/1.14  % ABCDEFGHIJKLMNOPQRSTUVWXYZ
% 0.47/1.14  
% 0.47/1.14  Memory use:
% 0.47/1.14  
% 0.47/1.14  space for terms:        16786
% 0.47/1.14  space for clauses:      87142
% 0.47/1.14  
% 0.47/1.14  
% 0.47/1.14  clauses generated:      1931
% 0.47/1.14  clauses kept:           953
% 0.47/1.14  clauses selected:       144
% 0.47/1.14  clauses deleted:        1
% 0.47/1.14  clauses inuse deleted:  0
% 0.47/1.14  
% 0.47/1.14  subsentry:          1128
% 0.47/1.14  literals s-matched: 980
% 0.47/1.14  literals matched:   980
% 0.47/1.14  full subsumption:   0
% 0.47/1.14  
% 0.47/1.14  checksum:           927475759
% 0.47/1.14  
% 0.47/1.14  
% 0.47/1.14  Bliksem ended
%------------------------------------------------------------------------------