TSTP Solution File: SET102-7 by Bliksem---1.12

View Problem - Process Solution

%------------------------------------------------------------------------------
% File     : Bliksem---1.12
% Problem  : SET102-7 : TPTP v8.1.0. Bugfixed v2.1.0.
% Transfm  : none
% Format   : tptp:raw
% Command  : bliksem %s

% Computer : n018.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 : Mon Jul 18 22:47:07 EDT 2022

% Result   : Unsatisfiable 4.57s 4.96s
% Output   : Refutation 4.57s
% Verified : 
% SZS Type : -

% Comments : 
%------------------------------------------------------------------------------
%----WARNING: Could not form TPTP format derivation
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.11/0.12  % Problem  : SET102-7 : TPTP v8.1.0. Bugfixed v2.1.0.
% 0.11/0.12  % Command  : bliksem %s
% 0.11/0.33  % Computer : n018.cluster.edu
% 0.11/0.33  % Model    : x86_64 x86_64
% 0.11/0.33  % CPU      : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.11/0.33  % Memory   : 8042.1875MB
% 0.11/0.33  % OS       : Linux 3.10.0-693.el7.x86_64
% 0.11/0.33  % CPULimit : 300
% 0.11/0.33  % DateTime : Sun Jul 10 12:34:57 EDT 2022
% 0.11/0.33  % CPUTime  : 
% 0.68/1.07  *** allocated 10000 integers for termspace/termends
% 0.68/1.07  *** allocated 10000 integers for clauses
% 0.68/1.07  *** allocated 10000 integers for justifications
% 0.68/1.07  Bliksem 1.12
% 0.68/1.07  
% 0.68/1.07  
% 0.68/1.07  Automatic Strategy Selection
% 0.68/1.07  
% 0.68/1.07  Clauses:
% 0.68/1.07  [
% 0.68/1.07     [ ~( subclass( X, Y ) ), ~( member( Z, X ) ), member( Z, Y ) ],
% 0.68/1.07     [ member( 'not_subclass_element'( X, Y ), X ), subclass( X, Y ) ],
% 0.68/1.07     [ ~( member( 'not_subclass_element'( X, Y ), Y ) ), subclass( X, Y ) ]
% 0.68/1.07    ,
% 0.68/1.07     [ subclass( X, 'universal_class' ) ],
% 0.68/1.07     [ ~( =( X, Y ) ), subclass( X, Y ) ],
% 0.68/1.07     [ ~( =( X, Y ) ), subclass( Y, X ) ],
% 0.68/1.07     [ ~( subclass( X, Y ) ), ~( subclass( Y, X ) ), =( X, Y ) ],
% 0.68/1.07     [ ~( member( X, 'unordered_pair'( Y, Z ) ) ), =( X, Y ), =( X, Z ) ]
% 0.68/1.07    ,
% 0.68/1.07     [ ~( member( X, 'universal_class' ) ), member( X, 'unordered_pair'( X, Y
% 0.68/1.07     ) ) ],
% 0.68/1.07     [ ~( member( X, 'universal_class' ) ), member( X, 'unordered_pair'( Y, X
% 0.68/1.07     ) ) ],
% 0.68/1.07     [ member( 'unordered_pair'( X, Y ), 'universal_class' ) ],
% 0.68/1.07     [ =( 'unordered_pair'( X, X ), singleton( X ) ) ],
% 0.68/1.07     [ =( 'unordered_pair'( singleton( X ), 'unordered_pair'( X, singleton( Y
% 0.68/1.07     ) ) ), 'ordered_pair'( X, Y ) ) ],
% 0.68/1.07     [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T ) ) ), member( 
% 0.68/1.07    X, Z ) ],
% 0.68/1.07     [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T ) ) ), member( 
% 0.68/1.07    Y, T ) ],
% 0.68/1.07     [ ~( member( X, Y ) ), ~( member( Z, T ) ), member( 'ordered_pair'( X, Z
% 0.68/1.07     ), 'cross_product'( Y, T ) ) ],
% 0.68/1.07     [ ~( member( X, 'cross_product'( Y, Z ) ) ), =( 'ordered_pair'( first( X
% 0.68/1.07     ), second( X ) ), X ) ],
% 0.68/1.07     [ subclass( 'element_relation', 'cross_product'( 'universal_class', 
% 0.68/1.07    'universal_class' ) ) ],
% 0.68/1.07     [ ~( member( 'ordered_pair'( X, Y ), 'element_relation' ) ), member( X, 
% 0.68/1.07    Y ) ],
% 0.68/1.07     [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( 'universal_class'
% 0.68/1.07    , 'universal_class' ) ) ), ~( member( X, Y ) ), member( 'ordered_pair'( X
% 0.68/1.07    , Y ), 'element_relation' ) ],
% 0.68/1.07     [ ~( member( X, intersection( Y, Z ) ) ), member( X, Y ) ],
% 0.68/1.07     [ ~( member( X, intersection( Y, Z ) ) ), member( X, Z ) ],
% 0.68/1.07     [ ~( member( X, Y ) ), ~( member( X, Z ) ), member( X, intersection( Y, 
% 0.68/1.07    Z ) ) ],
% 0.68/1.07     [ ~( member( X, complement( Y ) ) ), ~( member( X, Y ) ) ],
% 0.68/1.07     [ ~( member( X, 'universal_class' ) ), member( X, complement( Y ) ), 
% 0.68/1.07    member( X, Y ) ],
% 0.68/1.07     [ =( complement( intersection( complement( X ), complement( Y ) ) ), 
% 0.68/1.07    union( X, Y ) ) ],
% 0.68/1.07     [ =( intersection( complement( intersection( X, Y ) ), complement( 
% 0.68/1.07    intersection( complement( X ), complement( Y ) ) ) ), 
% 0.68/1.07    'symmetric_difference'( X, Y ) ) ],
% 0.68/1.07     [ =( intersection( X, 'cross_product'( Y, Z ) ), restrict( X, Y, Z ) ) ]
% 0.68/1.07    ,
% 0.68/1.07     [ =( intersection( 'cross_product'( X, Y ), Z ), restrict( Z, X, Y ) ) ]
% 0.68/1.07    ,
% 0.68/1.07     [ ~( =( restrict( X, singleton( Y ), 'universal_class' ), 'null_class' )
% 0.68/1.07     ), ~( member( Y, 'domain_of'( X ) ) ) ],
% 0.68/1.07     [ ~( member( X, 'universal_class' ) ), =( restrict( Y, singleton( X ), 
% 0.68/1.07    'universal_class' ), 'null_class' ), member( X, 'domain_of'( Y ) ) ],
% 0.68/1.07     [ subclass( rotate( X ), 'cross_product'( 'cross_product'( 
% 0.68/1.07    'universal_class', 'universal_class' ), 'universal_class' ) ) ],
% 0.68/1.07     [ ~( member( 'ordered_pair'( 'ordered_pair'( X, Y ), Z ), rotate( T ) )
% 0.68/1.07     ), member( 'ordered_pair'( 'ordered_pair'( Y, Z ), X ), T ) ],
% 0.68/1.07     [ ~( member( 'ordered_pair'( 'ordered_pair'( X, Y ), Z ), T ) ), ~( 
% 0.68/1.07    member( 'ordered_pair'( 'ordered_pair'( Z, X ), Y ), 'cross_product'( 
% 0.68/1.07    'cross_product'( 'universal_class', 'universal_class' ), 
% 0.68/1.07    'universal_class' ) ) ), member( 'ordered_pair'( 'ordered_pair'( Z, X ), 
% 0.68/1.07    Y ), rotate( T ) ) ],
% 0.68/1.07     [ subclass( flip( X ), 'cross_product'( 'cross_product'( 
% 0.68/1.07    'universal_class', 'universal_class' ), 'universal_class' ) ) ],
% 0.68/1.07     [ ~( member( 'ordered_pair'( 'ordered_pair'( X, Y ), Z ), flip( T ) ) )
% 0.68/1.07    , member( 'ordered_pair'( 'ordered_pair'( Y, X ), Z ), T ) ],
% 0.68/1.07     [ ~( member( 'ordered_pair'( 'ordered_pair'( X, Y ), Z ), T ) ), ~( 
% 0.68/1.07    member( 'ordered_pair'( 'ordered_pair'( Y, X ), Z ), 'cross_product'( 
% 0.68/1.07    'cross_product'( 'universal_class', 'universal_class' ), 
% 0.68/1.07    'universal_class' ) ) ), member( 'ordered_pair'( 'ordered_pair'( Y, X ), 
% 0.68/1.07    Z ), flip( T ) ) ],
% 0.68/1.07     [ =( 'domain_of'( flip( 'cross_product'( X, 'universal_class' ) ) ), 
% 0.68/1.07    inverse( X ) ) ],
% 0.68/1.07     [ =( 'domain_of'( inverse( X ) ), 'range_of'( X ) ) ],
% 0.68/1.07     [ =( first( 'not_subclass_element'( restrict( X, Y, singleton( Z ) ), 
% 0.68/1.07    'null_class' ) ), domain( X, Y, Z ) ) ],
% 0.68/1.07     [ =( second( 'not_subclass_element'( restrict( X, singleton( Y ), Z ), 
% 0.68/1.07    'null_class' ) ), range( X, Y, Z ) ) ],
% 0.68/1.07     [ =( 'range_of'( restrict( X, Y, 'universal_class' ) ), image( X, Y ) )
% 0.68/1.07     ],
% 0.68/1.07     [ =( union( X, singleton( X ) ), successor( X ) ) ],
% 0.68/1.07     [ subclass( 'successor_relation', 'cross_product'( 'universal_class', 
% 0.68/1.07    'universal_class' ) ) ],
% 0.68/1.07     [ ~( member( 'ordered_pair'( X, Y ), 'successor_relation' ) ), =( 
% 0.68/1.07    successor( X ), Y ) ],
% 0.68/1.07     [ ~( =( successor( X ), Y ) ), ~( member( 'ordered_pair'( X, Y ), 
% 0.68/1.07    'cross_product'( 'universal_class', 'universal_class' ) ) ), member( 
% 0.68/1.07    'ordered_pair'( X, Y ), 'successor_relation' ) ],
% 0.68/1.07     [ ~( inductive( X ) ), member( 'null_class', X ) ],
% 0.68/1.07     [ ~( inductive( X ) ), subclass( image( 'successor_relation', X ), X ) ]
% 0.68/1.07    ,
% 0.68/1.07     [ ~( member( 'null_class', X ) ), ~( subclass( image( 
% 0.68/1.08    'successor_relation', X ), X ) ), inductive( X ) ],
% 0.68/1.08     [ inductive( omega ) ],
% 0.68/1.08     [ ~( inductive( X ) ), subclass( omega, X ) ],
% 0.68/1.08     [ member( omega, 'universal_class' ) ],
% 0.68/1.08     [ =( 'domain_of'( restrict( 'element_relation', 'universal_class', X ) )
% 0.68/1.08    , 'sum_class'( X ) ) ],
% 0.68/1.08     [ ~( member( X, 'universal_class' ) ), member( 'sum_class'( X ), 
% 0.68/1.08    'universal_class' ) ],
% 0.68/1.08     [ =( complement( image( 'element_relation', complement( X ) ) ), 
% 0.68/1.08    'power_class'( X ) ) ],
% 0.68/1.08     [ ~( member( X, 'universal_class' ) ), member( 'power_class'( X ), 
% 0.68/1.08    'universal_class' ) ],
% 0.68/1.08     [ subclass( compose( X, Y ), 'cross_product'( 'universal_class', 
% 0.68/1.08    'universal_class' ) ) ],
% 0.68/1.08     [ ~( member( 'ordered_pair'( X, Y ), compose( Z, T ) ) ), member( Y, 
% 0.68/1.08    image( Z, image( T, singleton( X ) ) ) ) ],
% 0.68/1.08     [ ~( member( X, image( Y, image( Z, singleton( T ) ) ) ) ), ~( member( 
% 0.68/1.08    'ordered_pair'( T, X ), 'cross_product'( 'universal_class', 
% 0.68/1.08    'universal_class' ) ) ), member( 'ordered_pair'( T, X ), compose( Y, Z )
% 0.68/1.08     ) ],
% 0.68/1.08     [ ~( 'single_valued_class'( X ) ), subclass( compose( X, inverse( X ) )
% 0.68/1.08    , 'identity_relation' ) ],
% 0.68/1.08     [ ~( subclass( compose( X, inverse( X ) ), 'identity_relation' ) ), 
% 0.68/1.08    'single_valued_class'( X ) ],
% 0.68/1.08     [ ~( function( X ) ), subclass( X, 'cross_product'( 'universal_class', 
% 0.68/1.08    'universal_class' ) ) ],
% 0.68/1.08     [ ~( function( X ) ), subclass( compose( X, inverse( X ) ), 
% 0.68/1.08    'identity_relation' ) ],
% 0.68/1.08     [ ~( subclass( X, 'cross_product'( 'universal_class', 'universal_class'
% 0.68/1.08     ) ) ), ~( subclass( compose( X, inverse( X ) ), 'identity_relation' ) )
% 0.68/1.08    , function( X ) ],
% 0.68/1.08     [ ~( function( X ) ), ~( member( Y, 'universal_class' ) ), member( image( 
% 0.68/1.08    X, Y ), 'universal_class' ) ],
% 0.68/1.08     [ =( X, 'null_class' ), member( regular( X ), X ) ],
% 0.68/1.08     [ =( X, 'null_class' ), =( intersection( X, regular( X ) ), 'null_class'
% 0.68/1.08     ) ],
% 0.68/1.08     [ =( 'sum_class'( image( X, singleton( Y ) ) ), apply( X, Y ) ) ],
% 0.68/1.08     [ function( choice ) ],
% 0.68/1.08     [ ~( member( X, 'universal_class' ) ), =( X, 'null_class' ), member( 
% 0.68/1.08    apply( choice, X ), X ) ],
% 0.68/1.08     [ ~( 'one_to_one'( X ) ), function( X ) ],
% 0.68/1.08     [ ~( 'one_to_one'( X ) ), function( inverse( X ) ) ],
% 0.68/1.08     [ ~( function( inverse( X ) ) ), ~( function( X ) ), 'one_to_one'( X ) ]
% 0.68/1.08    ,
% 0.68/1.08     [ =( intersection( 'cross_product'( 'universal_class', 'universal_class'
% 0.68/1.08     ), intersection( 'cross_product'( 'universal_class', 'universal_class' )
% 0.68/1.08    , complement( compose( complement( 'element_relation' ), inverse( 
% 0.68/1.08    'element_relation' ) ) ) ) ), 'subset_relation' ) ],
% 0.68/1.08     [ =( intersection( inverse( 'subset_relation' ), 'subset_relation' ), 
% 0.68/1.08    'identity_relation' ) ],
% 0.68/1.08     [ =( complement( 'domain_of'( intersection( X, 'identity_relation' ) ) )
% 0.68/1.08    , diagonalise( X ) ) ],
% 0.68/1.08     [ =( intersection( 'domain_of'( X ), diagonalise( compose( inverse( 
% 0.68/1.08    'element_relation' ), X ) ) ), cantor( X ) ) ],
% 0.68/1.08     [ ~( operation( X ) ), function( X ) ],
% 0.68/1.08     [ ~( operation( X ) ), =( 'cross_product'( 'domain_of'( 'domain_of'( X )
% 0.68/1.08     ), 'domain_of'( 'domain_of'( X ) ) ), 'domain_of'( X ) ) ],
% 0.68/1.08     [ ~( operation( X ) ), subclass( 'range_of'( X ), 'domain_of'( 
% 0.68/1.08    'domain_of'( X ) ) ) ],
% 0.68/1.08     [ ~( function( X ) ), ~( =( 'cross_product'( 'domain_of'( 'domain_of'( X
% 0.68/1.08     ) ), 'domain_of'( 'domain_of'( X ) ) ), 'domain_of'( X ) ) ), ~( 
% 0.68/1.08    subclass( 'range_of'( X ), 'domain_of'( 'domain_of'( X ) ) ) ), operation( 
% 0.68/1.08    X ) ],
% 0.68/1.08     [ ~( compatible( X, Y, Z ) ), function( X ) ],
% 0.68/1.08     [ ~( compatible( X, Y, Z ) ), =( 'domain_of'( 'domain_of'( Y ) ), 
% 0.68/1.08    'domain_of'( X ) ) ],
% 0.68/1.08     [ ~( compatible( X, Y, Z ) ), subclass( 'range_of'( X ), 'domain_of'( 
% 0.68/1.08    'domain_of'( Z ) ) ) ],
% 0.68/1.08     [ ~( function( X ) ), ~( =( 'domain_of'( 'domain_of'( Y ) ), 'domain_of'( 
% 0.68/1.08    X ) ) ), ~( subclass( 'range_of'( X ), 'domain_of'( 'domain_of'( Z ) ) )
% 0.68/1.08     ), compatible( X, Y, Z ) ],
% 0.68/1.08     [ ~( homomorphism( X, Y, Z ) ), operation( Y ) ],
% 0.68/1.08     [ ~( homomorphism( X, Y, Z ) ), operation( Z ) ],
% 0.68/1.08     [ ~( homomorphism( X, Y, Z ) ), compatible( X, Y, Z ) ],
% 0.68/1.08     [ ~( homomorphism( X, Y, Z ) ), ~( member( 'ordered_pair'( T, U ), 
% 0.68/1.08    'domain_of'( Y ) ) ), =( apply( Z, 'ordered_pair'( apply( X, T ), apply( 
% 0.68/1.08    X, U ) ) ), apply( X, apply( Y, 'ordered_pair'( T, U ) ) ) ) ],
% 0.68/1.08     [ ~( operation( X ) ), ~( operation( Y ) ), ~( compatible( Z, X, Y ) ), 
% 0.68/1.08    member( 'ordered_pair'( 'not_homomorphism1'( Z, X, Y ), 
% 0.68/1.08    'not_homomorphism2'( Z, X, Y ) ), 'domain_of'( X ) ), homomorphism( Z, X
% 0.68/1.08    , Y ) ],
% 0.68/1.08     [ ~( operation( X ) ), ~( operation( Y ) ), ~( compatible( Z, X, Y ) ), 
% 0.68/1.08    ~( =( apply( Y, 'ordered_pair'( apply( Z, 'not_homomorphism1'( Z, X, Y )
% 0.68/1.08     ), apply( Z, 'not_homomorphism2'( Z, X, Y ) ) ) ), apply( Z, apply( X, 
% 0.68/1.08    'ordered_pair'( 'not_homomorphism1'( Z, X, Y ), 'not_homomorphism2'( Z, X
% 0.68/1.08    , Y ) ) ) ) ) ), homomorphism( Z, X, Y ) ],
% 0.68/1.08     [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T ) ) ), member( 
% 0.68/1.08    X, 'unordered_pair'( X, Y ) ) ],
% 0.68/1.08     [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T ) ) ), member( 
% 0.68/1.08    Y, 'unordered_pair'( X, Y ) ) ],
% 0.68/1.08     [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T ) ) ), member( 
% 0.68/1.08    X, 'universal_class' ) ],
% 0.68/1.08     [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T ) ) ), member( 
% 0.68/1.08    Y, 'universal_class' ) ],
% 0.68/1.08     [ subclass( X, X ) ],
% 0.68/1.08     [ ~( subclass( X, Y ) ), ~( subclass( Y, Z ) ), subclass( X, Z ) ],
% 0.68/1.08     [ =( X, Y ), member( 'not_subclass_element'( X, Y ), X ), member( 
% 0.68/1.08    'not_subclass_element'( Y, X ), Y ) ],
% 0.68/1.08     [ ~( member( 'not_subclass_element'( X, Y ), Y ) ), =( X, Y ), member( 
% 0.68/1.08    'not_subclass_element'( Y, X ), Y ) ],
% 0.68/1.08     [ ~( member( 'not_subclass_element'( X, Y ), Y ) ), =( Y, X ), member( 
% 0.68/1.08    'not_subclass_element'( Y, X ), Y ) ],
% 0.68/1.08     [ ~( member( 'not_subclass_element'( X, Y ), Y ) ), ~( member( 
% 0.68/1.08    'not_subclass_element'( Y, X ), X ) ), =( X, Y ) ],
% 0.68/1.08     [ ~( member( X, intersection( complement( Y ), Y ) ) ) ],
% 0.68/1.08     [ ~( member( X, 'null_class' ) ) ],
% 0.68/1.08     [ subclass( 'null_class', X ) ],
% 0.68/1.08     [ ~( subclass( X, 'null_class' ) ), =( X, 'null_class' ) ],
% 0.68/1.08     [ =( X, 'null_class' ), member( 'not_subclass_element'( X, 'null_class'
% 0.68/1.08     ), X ) ],
% 0.68/1.08     [ member( 'null_class', 'universal_class' ) ],
% 0.68/1.08     [ =( 'unordered_pair'( X, Y ), 'unordered_pair'( Y, X ) ) ],
% 0.68/1.08     [ subclass( singleton( X ), 'unordered_pair'( X, Y ) ) ],
% 0.68/1.08     [ subclass( singleton( X ), 'unordered_pair'( Y, X ) ) ],
% 0.68/1.08     [ member( X, 'universal_class' ), =( 'unordered_pair'( Y, X ), singleton( 
% 0.68/1.08    Y ) ) ],
% 0.68/1.08     [ member( X, 'universal_class' ), =( 'unordered_pair'( X, Y ), singleton( 
% 0.68/1.08    Y ) ) ],
% 0.68/1.08     [ =( 'unordered_pair'( X, Y ), 'null_class' ), member( X, 
% 0.68/1.08    'universal_class' ), member( Y, 'universal_class' ) ],
% 0.68/1.08     [ ~( =( 'unordered_pair'( X, Y ), 'unordered_pair'( X, Z ) ) ), ~( 
% 0.68/1.08    member( 'ordered_pair'( Y, Z ), 'cross_product'( 'universal_class', 
% 0.68/1.08    'universal_class' ) ) ), =( Y, Z ) ],
% 0.68/1.08     [ ~( =( 'unordered_pair'( X, Y ), 'unordered_pair'( Z, Y ) ) ), ~( 
% 0.68/1.08    member( 'ordered_pair'( X, Z ), 'cross_product'( 'universal_class', 
% 0.68/1.08    'universal_class' ) ) ), =( X, Z ) ],
% 0.68/1.08     [ ~( member( X, 'universal_class' ) ), ~( =( 'unordered_pair'( X, Y ), 
% 0.68/1.08    'null_class' ) ) ],
% 0.68/1.08     [ ~( member( X, 'universal_class' ) ), ~( =( 'unordered_pair'( Y, X ), 
% 0.68/1.08    'null_class' ) ) ],
% 0.68/1.08     [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T ) ) ), ~( =( 
% 0.68/1.08    'unordered_pair'( X, Y ), 'null_class' ) ) ],
% 2.06/2.44     [ ~( member( X, Y ) ), ~( member( Z, Y ) ), subclass( 'unordered_pair'( 
% 2.06/2.44    X, Z ), Y ) ],
% 2.06/2.44     [ member( singleton( X ), 'universal_class' ) ],
% 2.06/2.44     [ member( singleton( X ), 'unordered_pair'( Y, singleton( X ) ) ) ],
% 2.06/2.44     [ ~( member( X, 'universal_class' ) ), member( X, singleton( X ) ) ]
% 2.06/2.44    ,
% 2.06/2.44     [ ~( member( X, 'universal_class' ) ), ~( =( singleton( X ), 
% 2.06/2.44    'null_class' ) ) ],
% 2.06/2.44     [ member( 'null_class', singleton( 'null_class' ) ) ],
% 2.06/2.44     [ ~( member( X, singleton( Y ) ) ), =( X, Y ) ],
% 2.06/2.44     [ member( X, 'universal_class' ), =( singleton( X ), 'null_class' ) ]
% 2.06/2.44    ,
% 2.06/2.44     [ ~( =( singleton( X ), singleton( Y ) ) ), ~( member( X, 
% 2.06/2.44    'universal_class' ) ), =( X, Y ) ],
% 2.06/2.44     [ ~( =( singleton( X ), singleton( Y ) ) ), ~( member( Y, 
% 2.06/2.44    'universal_class' ) ), =( X, Y ) ],
% 2.06/2.44     [ ~( =( 'unordered_pair'( X, Y ), singleton( Z ) ) ), ~( member( Z, 
% 2.06/2.44    'universal_class' ) ), =( Z, X ), =( Z, Y ) ],
% 2.06/2.44     [ ~( member( X, 'universal_class' ) ), member( 'member_of'( singleton( X
% 2.06/2.44     ) ), 'universal_class' ) ],
% 2.06/2.44     [ ~( member( X, 'universal_class' ) ), =( singleton( 'member_of'( 
% 2.06/2.44    singleton( X ) ) ), singleton( X ) ) ],
% 2.06/2.44     [ member( 'member_of'( X ), 'universal_class' ), =( 'member_of'( X ), X
% 2.06/2.44     ) ],
% 2.06/2.44     [ =( singleton( 'member_of'( X ) ), X ), =( 'member_of'( X ), X ) ],
% 2.06/2.44     [ ~( member( X, 'universal_class' ) ), =( 'member_of'( singleton( X ) )
% 2.06/2.44    , X ) ],
% 2.06/2.44     [ member( 'member_of1'( X ), 'universal_class' ), =( 'member_of'( X ), X
% 2.06/2.44     ) ],
% 2.06/2.44     [ =( singleton( 'member_of1'( X ) ), X ), =( 'member_of'( X ), X ) ]
% 2.06/2.44    ,
% 2.06/2.44     [ ~( =( singleton( 'member_of'( X ) ), X ) ), member( X, 
% 2.06/2.44    'universal_class' ) ],
% 2.06/2.44     [ ~( =( singleton( 'member_of'( X ) ), X ) ), ~( member( Y, X ) ), =( 
% 2.06/2.44    'member_of'( X ), Y ) ],
% 2.06/2.44     [ ~( member( X, Y ) ), subclass( singleton( X ), Y ) ],
% 2.06/2.44     [ ~( subclass( X, singleton( Y ) ) ), =( X, 'null_class' ), =( singleton( 
% 2.06/2.44    Y ), X ) ],
% 2.06/2.44     [ member( 'not_subclass_element'( intersection( complement( singleton( 
% 2.06/2.44    'not_subclass_element'( X, 'null_class' ) ) ), X ), 'null_class' ), 
% 2.06/2.44    intersection( complement( singleton( 'not_subclass_element'( X, 
% 2.06/2.44    'null_class' ) ) ), X ) ), =( singleton( 'not_subclass_element'( X, 
% 2.06/2.44    'null_class' ) ), X ), =( X, 'null_class' ) ],
% 2.06/2.44     [ member( 'not_subclass_element'( intersection( complement( singleton( 
% 2.06/2.44    'not_subclass_element'( X, 'null_class' ) ) ), X ), 'null_class' ), X ), 
% 2.06/2.44    =( singleton( 'not_subclass_element'( X, 'null_class' ) ), X ), =( X, 
% 2.06/2.44    'null_class' ) ],
% 2.06/2.44     [ ~( =( 'not_subclass_element'( intersection( complement( singleton( 
% 2.06/2.44    'not_subclass_element'( X, 'null_class' ) ) ), X ), 'null_class' ), 
% 2.06/2.44    'not_subclass_element'( X, 'null_class' ) ) ), =( singleton( 
% 2.06/2.44    'not_subclass_element'( X, 'null_class' ) ), X ), =( X, 'null_class' ) ]
% 2.06/2.44    ,
% 2.06/2.44     [ =( 'unordered_pair'( X, Y ), union( singleton( X ), singleton( Y ) ) )
% 2.06/2.44     ],
% 2.06/2.44     [ member( 'ordered_pair'( X, Y ), 'universal_class' ) ],
% 2.06/2.44     [ ~( member( 'unordered_pair'( x, singleton( y ) ), 'ordered_pair'( x, y
% 2.06/2.44     ) ) ) ]
% 2.06/2.44  ] .
% 2.06/2.44  
% 2.06/2.44  
% 2.06/2.44  percentage equality = 0.294915, percentage horn = 0.828767
% 2.06/2.44  This is a problem with some equality
% 2.06/2.44  
% 2.06/2.44  
% 2.06/2.44  
% 2.06/2.44  Options Used:
% 2.06/2.44  
% 2.06/2.44  useres =            1
% 2.06/2.44  useparamod =        1
% 2.06/2.44  useeqrefl =         1
% 2.06/2.44  useeqfact =         1
% 2.06/2.44  usefactor =         1
% 2.06/2.44  usesimpsplitting =  0
% 2.06/2.44  usesimpdemod =      5
% 2.06/2.44  usesimpres =        3
% 2.06/2.44  
% 2.06/2.44  resimpinuse      =  1000
% 2.06/2.44  resimpclauses =     20000
% 2.06/2.44  substype =          eqrewr
% 2.06/2.44  backwardsubs =      1
% 2.06/2.44  selectoldest =      5
% 2.06/2.44  
% 2.06/2.44  litorderings [0] =  split
% 2.06/2.44  litorderings [1] =  extend the termordering, first sorting on arguments
% 2.06/2.44  
% 2.06/2.44  termordering =      kbo
% 2.06/2.44  
% 2.06/2.44  litapriori =        0
% 2.06/2.44  termapriori =       1
% 2.06/2.44  litaposteriori =    0
% 2.06/2.44  termaposteriori =   0
% 2.06/2.44  demodaposteriori =  0
% 2.06/2.44  ordereqreflfact =   0
% 2.06/2.44  
% 2.06/2.44  litselect =         negord
% 2.06/2.44  
% 2.06/2.44  maxweight =         15
% 2.06/2.44  maxdepth =          30000
% 2.06/2.44  maxlength =         115
% 2.06/2.44  maxnrvars =         195
% 2.06/2.44  excuselevel =       1
% 2.06/2.44  increasemaxweight = 1
% 2.06/2.44  
% 2.06/2.44  maxselected =       10000000
% 2.06/2.44  maxnrclauses =      10000000
% 2.06/2.44  
% 2.06/2.44  showgenerated =    0
% 2.06/2.44  showkept =         0
% 2.06/2.44  showselected =     0
% 2.06/2.44  showdeleted =      0
% 2.06/2.44  showresimp =       1
% 2.06/2.44  showstatus =       2000
% 2.06/2.44  
% 2.06/2.44  prologoutput =     1
% 2.06/2.44  nrgoals =          5000000
% 2.06/2.44  totalproof =       1
% 2.06/2.44  
% 2.06/2.44  Symbols occurring in the translation:
% 4.57/4.95  
% 4.57/4.95  {}  [0, 0]      (w:1, o:2, a:1, s:1, b:0), 
% 4.57/4.95  .  [1, 2]      (w:1, o:58, a:1, s:1, b:0), 
% 4.57/4.95  !  [4, 1]      (w:0, o:31, a:1, s:1, b:0), 
% 4.57/4.95  =  [13, 2]      (w:1, o:0, a:0, s:1, b:0), 
% 4.57/4.95  ==>  [14, 2]      (w:1, o:0, a:0, s:1, b:0), 
% 4.57/4.95  subclass  [41, 2]      (w:1, o:83, a:1, s:1, b:0), 
% 4.57/4.95  member  [43, 2]      (w:1, o:84, a:1, s:1, b:0), 
% 4.57/4.95  'not_subclass_element'  [44, 2]      (w:1, o:85, a:1, s:1, b:0), 
% 4.57/4.95  'universal_class'  [45, 0]      (w:1, o:21, a:1, s:1, b:0), 
% 4.57/4.95  'unordered_pair'  [46, 2]      (w:1, o:86, a:1, s:1, b:0), 
% 4.57/4.95  singleton  [47, 1]      (w:1, o:39, a:1, s:1, b:0), 
% 4.57/4.95  'ordered_pair'  [48, 2]      (w:1, o:87, a:1, s:1, b:0), 
% 4.57/4.95  'cross_product'  [50, 2]      (w:1, o:88, a:1, s:1, b:0), 
% 4.57/4.95  first  [52, 1]      (w:1, o:40, a:1, s:1, b:0), 
% 4.57/4.95  second  [53, 1]      (w:1, o:41, a:1, s:1, b:0), 
% 4.57/4.95  'element_relation'  [54, 0]      (w:1, o:25, a:1, s:1, b:0), 
% 4.57/4.95  intersection  [55, 2]      (w:1, o:90, a:1, s:1, b:0), 
% 4.57/4.95  complement  [56, 1]      (w:1, o:42, a:1, s:1, b:0), 
% 4.57/4.95  union  [57, 2]      (w:1, o:91, a:1, s:1, b:0), 
% 4.57/4.96  'symmetric_difference'  [58, 2]      (w:1, o:92, a:1, s:1, b:0), 
% 4.57/4.96  restrict  [60, 3]      (w:1, o:95, a:1, s:1, b:0), 
% 4.57/4.96  'null_class'  [61, 0]      (w:1, o:26, a:1, s:1, b:0), 
% 4.57/4.96  'domain_of'  [62, 1]      (w:1, o:44, a:1, s:1, b:0), 
% 4.57/4.96  rotate  [63, 1]      (w:1, o:36, a:1, s:1, b:0), 
% 4.57/4.96  flip  [65, 1]      (w:1, o:45, a:1, s:1, b:0), 
% 4.57/4.96  inverse  [66, 1]      (w:1, o:46, a:1, s:1, b:0), 
% 4.57/4.96  'range_of'  [67, 1]      (w:1, o:37, a:1, s:1, b:0), 
% 4.57/4.96  domain  [68, 3]      (w:1, o:97, a:1, s:1, b:0), 
% 4.57/4.96  range  [69, 3]      (w:1, o:98, a:1, s:1, b:0), 
% 4.57/4.96  image  [70, 2]      (w:1, o:89, a:1, s:1, b:0), 
% 4.57/4.96  successor  [71, 1]      (w:1, o:47, a:1, s:1, b:0), 
% 4.57/4.96  'successor_relation'  [72, 0]      (w:1, o:6, a:1, s:1, b:0), 
% 4.57/4.96  inductive  [73, 1]      (w:1, o:48, a:1, s:1, b:0), 
% 4.57/4.96  omega  [74, 0]      (w:1, o:9, a:1, s:1, b:0), 
% 4.57/4.96  'sum_class'  [75, 1]      (w:1, o:49, a:1, s:1, b:0), 
% 4.57/4.96  'power_class'  [76, 1]      (w:1, o:52, a:1, s:1, b:0), 
% 4.57/4.96  compose  [78, 2]      (w:1, o:93, a:1, s:1, b:0), 
% 4.57/4.96  'single_valued_class'  [79, 1]      (w:1, o:53, a:1, s:1, b:0), 
% 4.57/4.96  'identity_relation'  [80, 0]      (w:1, o:27, a:1, s:1, b:0), 
% 4.57/4.96  function  [82, 1]      (w:1, o:54, a:1, s:1, b:0), 
% 4.57/4.96  regular  [83, 1]      (w:1, o:38, a:1, s:1, b:0), 
% 4.57/4.96  apply  [84, 2]      (w:1, o:94, a:1, s:1, b:0), 
% 4.57/4.96  choice  [85, 0]      (w:1, o:28, a:1, s:1, b:0), 
% 4.57/4.96  'one_to_one'  [86, 1]      (w:1, o:50, a:1, s:1, b:0), 
% 4.57/4.96  'subset_relation'  [87, 0]      (w:1, o:5, a:1, s:1, b:0), 
% 4.57/4.96  diagonalise  [88, 1]      (w:1, o:55, a:1, s:1, b:0), 
% 4.57/4.96  cantor  [89, 1]      (w:1, o:43, a:1, s:1, b:0), 
% 4.57/4.96  operation  [90, 1]      (w:1, o:51, a:1, s:1, b:0), 
% 4.57/4.96  compatible  [94, 3]      (w:1, o:96, a:1, s:1, b:0), 
% 4.57/4.96  homomorphism  [95, 3]      (w:1, o:99, a:1, s:1, b:0), 
% 4.57/4.96  'not_homomorphism1'  [96, 3]      (w:1, o:100, a:1, s:1, b:0), 
% 4.57/4.96  'not_homomorphism2'  [97, 3]      (w:1, o:101, a:1, s:1, b:0), 
% 4.57/4.96  'member_of'  [98, 1]      (w:1, o:56, a:1, s:1, b:0), 
% 4.57/4.96  'member_of1'  [99, 1]      (w:1, o:57, a:1, s:1, b:0), 
% 4.57/4.96  x  [100, 0]      (w:1, o:29, a:1, s:1, b:0), 
% 4.57/4.96  y  [101, 0]      (w:1, o:30, a:1, s:1, b:0).
% 4.57/4.96  
% 4.57/4.96  
% 4.57/4.96  Starting Search:
% 4.57/4.96  
% 4.57/4.96  Resimplifying inuse:
% 4.57/4.96  Done
% 4.57/4.96  
% 4.57/4.96  
% 4.57/4.96  Intermediate Status:
% 4.57/4.96  Generated:    4171
% 4.57/4.96  Kept:         2009
% 4.57/4.96  Inuse:        121
% 4.57/4.96  Deleted:      5
% 4.57/4.96  Deletedinuse: 2
% 4.57/4.96  
% 4.57/4.96  Resimplifying inuse:
% 4.57/4.96  Done
% 4.57/4.96  
% 4.57/4.96  Resimplifying inuse:
% 4.57/4.96  Done
% 4.57/4.96  
% 4.57/4.96  
% 4.57/4.96  Intermediate Status:
% 4.57/4.96  Generated:    9978
% 4.57/4.96  Kept:         4012
% 4.57/4.96  Inuse:        195
% 4.57/4.96  Deleted:      10
% 4.57/4.96  Deletedinuse: 4
% 4.57/4.96  
% 4.57/4.96  Resimplifying inuse:
% 4.57/4.96  Done
% 4.57/4.96  
% 4.57/4.96  Resimplifying inuse:
% 4.57/4.96  Done
% 4.57/4.96  
% 4.57/4.96  
% 4.57/4.96  Intermediate Status:
% 4.57/4.96  Generated:    15176
% 4.57/4.96  Kept:         6016
% 4.57/4.96  Inuse:        275
% 4.57/4.96  Deleted:      57
% 4.57/4.96  Deletedinuse: 39
% 4.57/4.96  
% 4.57/4.96  Resimplifying inuse:
% 4.57/4.96  Done
% 4.57/4.96  
% 4.57/4.96  Resimplifying inuse:
% 4.57/4.96  Done
% 4.57/4.96  
% 4.57/4.96  
% 4.57/4.96  Intermediate Status:
% 4.57/4.96  Generated:    20704
% 4.57/4.96  Kept:         8035
% 4.57/4.96  Inuse:        355
% 4.57/4.96  Deleted:      65
% 4.57/4.96  Deletedinuse: 45
% 4.57/4.96  
% 4.57/4.96  Resimplifying inuse:
% 4.57/4.96  Done
% 4.57/4.96  
% 4.57/4.96  Resimplifying inuse:
% 4.57/4.96  Done
% 4.57/4.96  
% 4.57/4.96  
% 4.57/4.96  Intermediate Status:
% 4.57/4.96  Generated:    27139
% 4.57/4.96  Kept:         10119
% 4.57/4.96  Inuse:        391
% 4.57/4.96  Deleted:      65
% 4.57/4.96  Deletedinuse: 45
% 4.57/4.96  
% 4.57/4.96  Resimplifying inuse:
% 4.57/4.96  Done
% 4.57/4.96  
% 4.57/4.96  Resimplifying inuse:
% 4.57/4.96  Done
% 4.57/4.96  
% 4.57/4.96  
% 4.57/4.96  Intermediate Status:
% 4.57/4.96  Generated:    36642
% 4.57/4.96  Kept:         12189
% 4.57/4.96  Inuse:        430
% 4.57/4.96  Deleted:      67
% 4.57/4.96  Deletedinuse: 46
% 4.57/4.96  
% 4.57/4.96  Resimplifying inuse:
% 4.57/4.96  Done
% 4.57/4.96  
% 4.57/4.96  Resimplifying inuse:
% 4.57/4.96  Done
% 4.57/4.96  
% 4.57/4.96  
% 4.57/4.96  Intermediate Status:
% 4.57/4.96  Generated:    46682
% 4.57/4.96  Kept:         15863
% 4.57/4.96  Inuse:        470
% 4.57/4.96  Deleted:      77
% 4.57/4.96  Deletedinuse: 51
% 4.57/4.96  
% 4.57/4.96  Resimplifying inuse:
% 4.57/4.96  Done
% 4.57/4.96  
% 4.57/4.96  Resimplifying inuse:
% 4.57/4.96  Done
% 4.57/4.96  
% 4.57/4.96  
% 4.57/4.96  Intermediate Status:
% 4.57/4.96  Generated:    52344
% 4.57/4.96  Kept:         17879
% 4.57/4.96  Inuse:        484
% 4.57/4.96  Deleted:      78
% 4.57/4.96  Deletedinuse: 52
% 4.57/4.96  
% 4.57/4.96  Resimplifying inuse:
% 4.57/4.96  Done
% 4.57/4.96  
% 4.57/4.96  
% 4.57/4.96  Intermediate Status:
% 4.57/4.96  Generated:    60799
% 4.57/4.96  Kept:         19892
% 4.57/4.96  Inuse:        486
% 4.57/4.96  Deleted:      79
% 4.57/4.96  Deletedinuse: 53
% 4.57/4.96  
% 4.57/4.96  Resimplifying clauses:
% 4.57/4.96  
% 4.57/4.96  Bliksems!, er is een bewijs:
% 4.57/4.96  % SZS status Unsatisfiable
% 4.57/4.96  % SZS output start Refutation
% 4.57/4.96  
% 4.57/4.96  clause( 8, [ ~( member( X, 'universal_class' ) ), member( X, 
% 4.57/4.96    'unordered_pair'( Y, X ) ) ] )
% 4.57/4.96  .
% 4.57/4.96  clause( 9, [ member( 'unordered_pair'( X, Y ), 'universal_class' ) ] )
% 4.57/4.96  .
% 4.57/4.96  clause( 11, [ =( 'unordered_pair'( singleton( X ), 'unordered_pair'( X, 
% 4.57/4.96    singleton( Y ) ) ), 'ordered_pair'( X, Y ) ) ] )
% 4.57/4.96  .
% 4.57/4.96  clause( 142, [ ~( member( 'unordered_pair'( x, singleton( y ) ), 
% 4.57/4.96    'ordered_pair'( x, y ) ) ) ] )
% 4.57/4.96  .
% 4.57/4.96  clause( 563, [ member( 'unordered_pair'( X, singleton( Y ) ), 
% 4.57/4.96    'ordered_pair'( X, Y ) ) ] )
% 4.57/4.96  .
% 4.57/4.96  clause( 20032, [] )
% 4.57/4.96  .
% 4.57/4.96  
% 4.57/4.96  
% 4.57/4.96  % SZS output end Refutation
% 4.57/4.96  found a proof!
% 4.57/4.96  
% 4.57/4.96  % ABCDEFGHIJKLMNOPQRSTUVWXYZ
% 4.57/4.96  
% 4.57/4.96  initialclauses(
% 4.57/4.96  [ clause( 20034, [ ~( subclass( X, Y ) ), ~( member( Z, X ) ), member( Z, Y
% 4.57/4.96     ) ] )
% 4.57/4.96  , clause( 20035, [ member( 'not_subclass_element'( X, Y ), X ), subclass( X
% 4.57/4.96    , Y ) ] )
% 4.57/4.96  , clause( 20036, [ ~( member( 'not_subclass_element'( X, Y ), Y ) ), 
% 4.57/4.96    subclass( X, Y ) ] )
% 4.57/4.96  , clause( 20037, [ subclass( X, 'universal_class' ) ] )
% 4.57/4.96  , clause( 20038, [ ~( =( X, Y ) ), subclass( X, Y ) ] )
% 4.57/4.96  , clause( 20039, [ ~( =( X, Y ) ), subclass( Y, X ) ] )
% 4.57/4.96  , clause( 20040, [ ~( subclass( X, Y ) ), ~( subclass( Y, X ) ), =( X, Y )
% 4.57/4.96     ] )
% 4.57/4.96  , clause( 20041, [ ~( member( X, 'unordered_pair'( Y, Z ) ) ), =( X, Y ), 
% 4.57/4.96    =( X, Z ) ] )
% 4.57/4.96  , clause( 20042, [ ~( member( X, 'universal_class' ) ), member( X, 
% 4.57/4.96    'unordered_pair'( X, Y ) ) ] )
% 4.57/4.96  , clause( 20043, [ ~( member( X, 'universal_class' ) ), member( X, 
% 4.57/4.96    'unordered_pair'( Y, X ) ) ] )
% 4.57/4.96  , clause( 20044, [ member( 'unordered_pair'( X, Y ), 'universal_class' ) ]
% 4.57/4.96     )
% 4.57/4.96  , clause( 20045, [ =( 'unordered_pair'( X, X ), singleton( X ) ) ] )
% 4.57/4.96  , clause( 20046, [ =( 'unordered_pair'( singleton( X ), 'unordered_pair'( X
% 4.57/4.96    , singleton( Y ) ) ), 'ordered_pair'( X, Y ) ) ] )
% 4.57/4.96  , clause( 20047, [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T
% 4.57/4.96     ) ) ), member( X, Z ) ] )
% 4.57/4.96  , clause( 20048, [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T
% 4.57/4.96     ) ) ), member( Y, T ) ] )
% 4.57/4.96  , clause( 20049, [ ~( member( X, Y ) ), ~( member( Z, T ) ), member( 
% 4.57/4.96    'ordered_pair'( X, Z ), 'cross_product'( Y, T ) ) ] )
% 4.57/4.96  , clause( 20050, [ ~( member( X, 'cross_product'( Y, Z ) ) ), =( 
% 4.57/4.96    'ordered_pair'( first( X ), second( X ) ), X ) ] )
% 4.57/4.96  , clause( 20051, [ subclass( 'element_relation', 'cross_product'( 
% 4.57/4.96    'universal_class', 'universal_class' ) ) ] )
% 4.57/4.96  , clause( 20052, [ ~( member( 'ordered_pair'( X, Y ), 'element_relation' )
% 4.57/4.96     ), member( X, Y ) ] )
% 4.57/4.96  , clause( 20053, [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( 
% 4.57/4.96    'universal_class', 'universal_class' ) ) ), ~( member( X, Y ) ), member( 
% 4.57/4.96    'ordered_pair'( X, Y ), 'element_relation' ) ] )
% 4.57/4.96  , clause( 20054, [ ~( member( X, intersection( Y, Z ) ) ), member( X, Y ) ]
% 4.57/4.96     )
% 4.57/4.96  , clause( 20055, [ ~( member( X, intersection( Y, Z ) ) ), member( X, Z ) ]
% 4.57/4.96     )
% 4.57/4.96  , clause( 20056, [ ~( member( X, Y ) ), ~( member( X, Z ) ), member( X, 
% 4.57/4.96    intersection( Y, Z ) ) ] )
% 4.57/4.96  , clause( 20057, [ ~( member( X, complement( Y ) ) ), ~( member( X, Y ) ) ]
% 4.57/4.96     )
% 4.57/4.96  , clause( 20058, [ ~( member( X, 'universal_class' ) ), member( X, 
% 4.57/4.96    complement( Y ) ), member( X, Y ) ] )
% 4.57/4.96  , clause( 20059, [ =( complement( intersection( complement( X ), complement( 
% 4.57/4.96    Y ) ) ), union( X, Y ) ) ] )
% 4.57/4.96  , clause( 20060, [ =( intersection( complement( intersection( X, Y ) ), 
% 4.57/4.96    complement( intersection( complement( X ), complement( Y ) ) ) ), 
% 4.57/4.96    'symmetric_difference'( X, Y ) ) ] )
% 4.57/4.96  , clause( 20061, [ =( intersection( X, 'cross_product'( Y, Z ) ), restrict( 
% 4.57/4.96    X, Y, Z ) ) ] )
% 4.57/4.96  , clause( 20062, [ =( intersection( 'cross_product'( X, Y ), Z ), restrict( 
% 4.57/4.96    Z, X, Y ) ) ] )
% 4.57/4.96  , clause( 20063, [ ~( =( restrict( X, singleton( Y ), 'universal_class' ), 
% 4.57/4.96    'null_class' ) ), ~( member( Y, 'domain_of'( X ) ) ) ] )
% 4.57/4.96  , clause( 20064, [ ~( member( X, 'universal_class' ) ), =( restrict( Y, 
% 4.57/4.96    singleton( X ), 'universal_class' ), 'null_class' ), member( X, 
% 4.57/4.96    'domain_of'( Y ) ) ] )
% 4.57/4.96  , clause( 20065, [ subclass( rotate( X ), 'cross_product'( 'cross_product'( 
% 4.57/4.96    'universal_class', 'universal_class' ), 'universal_class' ) ) ] )
% 4.57/4.96  , clause( 20066, [ ~( member( 'ordered_pair'( 'ordered_pair'( X, Y ), Z ), 
% 4.57/4.96    rotate( T ) ) ), member( 'ordered_pair'( 'ordered_pair'( Y, Z ), X ), T )
% 4.57/4.96     ] )
% 4.57/4.96  , clause( 20067, [ ~( member( 'ordered_pair'( 'ordered_pair'( X, Y ), Z ), 
% 4.57/4.96    T ) ), ~( member( 'ordered_pair'( 'ordered_pair'( Z, X ), Y ), 
% 4.57/4.96    'cross_product'( 'cross_product'( 'universal_class', 'universal_class' )
% 4.57/4.96    , 'universal_class' ) ) ), member( 'ordered_pair'( 'ordered_pair'( Z, X )
% 4.57/4.96    , Y ), rotate( T ) ) ] )
% 4.57/4.96  , clause( 20068, [ subclass( flip( X ), 'cross_product'( 'cross_product'( 
% 4.57/4.96    'universal_class', 'universal_class' ), 'universal_class' ) ) ] )
% 4.57/4.96  , clause( 20069, [ ~( member( 'ordered_pair'( 'ordered_pair'( X, Y ), Z ), 
% 4.57/4.96    flip( T ) ) ), member( 'ordered_pair'( 'ordered_pair'( Y, X ), Z ), T ) ]
% 4.57/4.96     )
% 4.57/4.96  , clause( 20070, [ ~( member( 'ordered_pair'( 'ordered_pair'( X, Y ), Z ), 
% 4.57/4.96    T ) ), ~( member( 'ordered_pair'( 'ordered_pair'( Y, X ), Z ), 
% 4.57/4.96    'cross_product'( 'cross_product'( 'universal_class', 'universal_class' )
% 4.57/4.96    , 'universal_class' ) ) ), member( 'ordered_pair'( 'ordered_pair'( Y, X )
% 4.57/4.96    , Z ), flip( T ) ) ] )
% 4.57/4.96  , clause( 20071, [ =( 'domain_of'( flip( 'cross_product'( X, 
% 4.57/4.96    'universal_class' ) ) ), inverse( X ) ) ] )
% 4.57/4.96  , clause( 20072, [ =( 'domain_of'( inverse( X ) ), 'range_of'( X ) ) ] )
% 4.57/4.96  , clause( 20073, [ =( first( 'not_subclass_element'( restrict( X, Y, 
% 4.57/4.96    singleton( Z ) ), 'null_class' ) ), domain( X, Y, Z ) ) ] )
% 4.57/4.96  , clause( 20074, [ =( second( 'not_subclass_element'( restrict( X, 
% 4.57/4.96    singleton( Y ), Z ), 'null_class' ) ), range( X, Y, Z ) ) ] )
% 4.57/4.96  , clause( 20075, [ =( 'range_of'( restrict( X, Y, 'universal_class' ) ), 
% 4.57/4.96    image( X, Y ) ) ] )
% 4.57/4.96  , clause( 20076, [ =( union( X, singleton( X ) ), successor( X ) ) ] )
% 4.57/4.96  , clause( 20077, [ subclass( 'successor_relation', 'cross_product'( 
% 4.57/4.96    'universal_class', 'universal_class' ) ) ] )
% 4.57/4.96  , clause( 20078, [ ~( member( 'ordered_pair'( X, Y ), 'successor_relation'
% 4.57/4.96     ) ), =( successor( X ), Y ) ] )
% 4.57/4.96  , clause( 20079, [ ~( =( successor( X ), Y ) ), ~( member( 'ordered_pair'( 
% 4.57/4.96    X, Y ), 'cross_product'( 'universal_class', 'universal_class' ) ) ), 
% 4.57/4.96    member( 'ordered_pair'( X, Y ), 'successor_relation' ) ] )
% 4.57/4.96  , clause( 20080, [ ~( inductive( X ) ), member( 'null_class', X ) ] )
% 4.57/4.96  , clause( 20081, [ ~( inductive( X ) ), subclass( image( 
% 4.57/4.96    'successor_relation', X ), X ) ] )
% 4.57/4.96  , clause( 20082, [ ~( member( 'null_class', X ) ), ~( subclass( image( 
% 4.57/4.96    'successor_relation', X ), X ) ), inductive( X ) ] )
% 4.57/4.96  , clause( 20083, [ inductive( omega ) ] )
% 4.57/4.96  , clause( 20084, [ ~( inductive( X ) ), subclass( omega, X ) ] )
% 4.57/4.96  , clause( 20085, [ member( omega, 'universal_class' ) ] )
% 4.57/4.96  , clause( 20086, [ =( 'domain_of'( restrict( 'element_relation', 
% 4.57/4.96    'universal_class', X ) ), 'sum_class'( X ) ) ] )
% 4.57/4.96  , clause( 20087, [ ~( member( X, 'universal_class' ) ), member( 'sum_class'( 
% 4.57/4.96    X ), 'universal_class' ) ] )
% 4.57/4.96  , clause( 20088, [ =( complement( image( 'element_relation', complement( X
% 4.57/4.96     ) ) ), 'power_class'( X ) ) ] )
% 4.57/4.96  , clause( 20089, [ ~( member( X, 'universal_class' ) ), member( 
% 4.57/4.96    'power_class'( X ), 'universal_class' ) ] )
% 4.57/4.96  , clause( 20090, [ subclass( compose( X, Y ), 'cross_product'( 
% 4.57/4.96    'universal_class', 'universal_class' ) ) ] )
% 4.57/4.96  , clause( 20091, [ ~( member( 'ordered_pair'( X, Y ), compose( Z, T ) ) ), 
% 4.57/4.96    member( Y, image( Z, image( T, singleton( X ) ) ) ) ] )
% 4.57/4.96  , clause( 20092, [ ~( member( X, image( Y, image( Z, singleton( T ) ) ) ) )
% 4.57/4.96    , ~( member( 'ordered_pair'( T, X ), 'cross_product'( 'universal_class', 
% 4.57/4.96    'universal_class' ) ) ), member( 'ordered_pair'( T, X ), compose( Y, Z )
% 4.57/4.96     ) ] )
% 4.57/4.96  , clause( 20093, [ ~( 'single_valued_class'( X ) ), subclass( compose( X, 
% 4.57/4.96    inverse( X ) ), 'identity_relation' ) ] )
% 4.57/4.96  , clause( 20094, [ ~( subclass( compose( X, inverse( X ) ), 
% 4.57/4.96    'identity_relation' ) ), 'single_valued_class'( X ) ] )
% 4.57/4.96  , clause( 20095, [ ~( function( X ) ), subclass( X, 'cross_product'( 
% 4.57/4.96    'universal_class', 'universal_class' ) ) ] )
% 4.57/4.96  , clause( 20096, [ ~( function( X ) ), subclass( compose( X, inverse( X ) )
% 4.57/4.96    , 'identity_relation' ) ] )
% 4.57/4.96  , clause( 20097, [ ~( subclass( X, 'cross_product'( 'universal_class', 
% 4.57/4.96    'universal_class' ) ) ), ~( subclass( compose( X, inverse( X ) ), 
% 4.57/4.96    'identity_relation' ) ), function( X ) ] )
% 4.57/4.96  , clause( 20098, [ ~( function( X ) ), ~( member( Y, 'universal_class' ) )
% 4.57/4.96    , member( image( X, Y ), 'universal_class' ) ] )
% 4.57/4.96  , clause( 20099, [ =( X, 'null_class' ), member( regular( X ), X ) ] )
% 4.57/4.96  , clause( 20100, [ =( X, 'null_class' ), =( intersection( X, regular( X ) )
% 4.57/4.96    , 'null_class' ) ] )
% 4.57/4.96  , clause( 20101, [ =( 'sum_class'( image( X, singleton( Y ) ) ), apply( X, 
% 4.57/4.96    Y ) ) ] )
% 4.57/4.96  , clause( 20102, [ function( choice ) ] )
% 4.57/4.96  , clause( 20103, [ ~( member( X, 'universal_class' ) ), =( X, 'null_class'
% 4.57/4.96     ), member( apply( choice, X ), X ) ] )
% 4.57/4.96  , clause( 20104, [ ~( 'one_to_one'( X ) ), function( X ) ] )
% 4.57/4.96  , clause( 20105, [ ~( 'one_to_one'( X ) ), function( inverse( X ) ) ] )
% 4.57/4.96  , clause( 20106, [ ~( function( inverse( X ) ) ), ~( function( X ) ), 
% 4.57/4.96    'one_to_one'( X ) ] )
% 4.57/4.96  , clause( 20107, [ =( intersection( 'cross_product'( 'universal_class', 
% 4.57/4.96    'universal_class' ), intersection( 'cross_product'( 'universal_class', 
% 4.57/4.96    'universal_class' ), complement( compose( complement( 'element_relation'
% 4.57/4.96     ), inverse( 'element_relation' ) ) ) ) ), 'subset_relation' ) ] )
% 4.57/4.96  , clause( 20108, [ =( intersection( inverse( 'subset_relation' ), 
% 4.57/4.96    'subset_relation' ), 'identity_relation' ) ] )
% 4.57/4.96  , clause( 20109, [ =( complement( 'domain_of'( intersection( X, 
% 4.57/4.96    'identity_relation' ) ) ), diagonalise( X ) ) ] )
% 4.57/4.96  , clause( 20110, [ =( intersection( 'domain_of'( X ), diagonalise( compose( 
% 4.57/4.96    inverse( 'element_relation' ), X ) ) ), cantor( X ) ) ] )
% 4.57/4.96  , clause( 20111, [ ~( operation( X ) ), function( X ) ] )
% 4.57/4.96  , clause( 20112, [ ~( operation( X ) ), =( 'cross_product'( 'domain_of'( 
% 4.57/4.96    'domain_of'( X ) ), 'domain_of'( 'domain_of'( X ) ) ), 'domain_of'( X ) )
% 4.57/4.96     ] )
% 4.57/4.96  , clause( 20113, [ ~( operation( X ) ), subclass( 'range_of'( X ), 
% 4.57/4.96    'domain_of'( 'domain_of'( X ) ) ) ] )
% 4.57/4.96  , clause( 20114, [ ~( function( X ) ), ~( =( 'cross_product'( 'domain_of'( 
% 4.57/4.96    'domain_of'( X ) ), 'domain_of'( 'domain_of'( X ) ) ), 'domain_of'( X ) )
% 4.57/4.96     ), ~( subclass( 'range_of'( X ), 'domain_of'( 'domain_of'( X ) ) ) ), 
% 4.57/4.96    operation( X ) ] )
% 4.57/4.96  , clause( 20115, [ ~( compatible( X, Y, Z ) ), function( X ) ] )
% 4.57/4.96  , clause( 20116, [ ~( compatible( X, Y, Z ) ), =( 'domain_of'( 'domain_of'( 
% 4.57/4.96    Y ) ), 'domain_of'( X ) ) ] )
% 4.57/4.96  , clause( 20117, [ ~( compatible( X, Y, Z ) ), subclass( 'range_of'( X ), 
% 4.57/4.96    'domain_of'( 'domain_of'( Z ) ) ) ] )
% 4.57/4.96  , clause( 20118, [ ~( function( X ) ), ~( =( 'domain_of'( 'domain_of'( Y )
% 4.57/4.96     ), 'domain_of'( X ) ) ), ~( subclass( 'range_of'( X ), 'domain_of'( 
% 4.57/4.96    'domain_of'( Z ) ) ) ), compatible( X, Y, Z ) ] )
% 4.57/4.96  , clause( 20119, [ ~( homomorphism( X, Y, Z ) ), operation( Y ) ] )
% 4.57/4.96  , clause( 20120, [ ~( homomorphism( X, Y, Z ) ), operation( Z ) ] )
% 4.57/4.96  , clause( 20121, [ ~( homomorphism( X, Y, Z ) ), compatible( X, Y, Z ) ] )
% 4.57/4.96  , clause( 20122, [ ~( homomorphism( X, Y, Z ) ), ~( member( 'ordered_pair'( 
% 4.57/4.96    T, U ), 'domain_of'( Y ) ) ), =( apply( Z, 'ordered_pair'( apply( X, T )
% 4.57/4.96    , apply( X, U ) ) ), apply( X, apply( Y, 'ordered_pair'( T, U ) ) ) ) ]
% 4.57/4.96     )
% 4.57/4.96  , clause( 20123, [ ~( operation( X ) ), ~( operation( Y ) ), ~( compatible( 
% 4.57/4.96    Z, X, Y ) ), member( 'ordered_pair'( 'not_homomorphism1'( Z, X, Y ), 
% 4.57/4.96    'not_homomorphism2'( Z, X, Y ) ), 'domain_of'( X ) ), homomorphism( Z, X
% 4.57/4.96    , Y ) ] )
% 4.57/4.96  , clause( 20124, [ ~( operation( X ) ), ~( operation( Y ) ), ~( compatible( 
% 4.57/4.96    Z, X, Y ) ), ~( =( apply( Y, 'ordered_pair'( apply( Z, 
% 4.57/4.96    'not_homomorphism1'( Z, X, Y ) ), apply( Z, 'not_homomorphism2'( Z, X, Y
% 4.57/4.96     ) ) ) ), apply( Z, apply( X, 'ordered_pair'( 'not_homomorphism1'( Z, X, 
% 4.57/4.96    Y ), 'not_homomorphism2'( Z, X, Y ) ) ) ) ) ), homomorphism( Z, X, Y ) ]
% 4.57/4.96     )
% 4.57/4.96  , clause( 20125, [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T
% 4.57/4.96     ) ) ), member( X, 'unordered_pair'( X, Y ) ) ] )
% 4.57/4.96  , clause( 20126, [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T
% 4.57/4.96     ) ) ), member( Y, 'unordered_pair'( X, Y ) ) ] )
% 4.57/4.96  , clause( 20127, [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T
% 4.57/4.96     ) ) ), member( X, 'universal_class' ) ] )
% 4.57/4.96  , clause( 20128, [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T
% 4.57/4.96     ) ) ), member( Y, 'universal_class' ) ] )
% 4.57/4.96  , clause( 20129, [ subclass( X, X ) ] )
% 4.57/4.96  , clause( 20130, [ ~( subclass( X, Y ) ), ~( subclass( Y, Z ) ), subclass( 
% 4.57/4.96    X, Z ) ] )
% 4.57/4.96  , clause( 20131, [ =( X, Y ), member( 'not_subclass_element'( X, Y ), X ), 
% 4.57/4.96    member( 'not_subclass_element'( Y, X ), Y ) ] )
% 4.57/4.96  , clause( 20132, [ ~( member( 'not_subclass_element'( X, Y ), Y ) ), =( X, 
% 4.57/4.96    Y ), member( 'not_subclass_element'( Y, X ), Y ) ] )
% 4.57/4.96  , clause( 20133, [ ~( member( 'not_subclass_element'( X, Y ), Y ) ), =( Y, 
% 4.57/4.96    X ), member( 'not_subclass_element'( Y, X ), Y ) ] )
% 4.57/4.96  , clause( 20134, [ ~( member( 'not_subclass_element'( X, Y ), Y ) ), ~( 
% 4.57/4.96    member( 'not_subclass_element'( Y, X ), X ) ), =( X, Y ) ] )
% 4.57/4.96  , clause( 20135, [ ~( member( X, intersection( complement( Y ), Y ) ) ) ]
% 4.57/4.96     )
% 4.57/4.96  , clause( 20136, [ ~( member( X, 'null_class' ) ) ] )
% 4.57/4.96  , clause( 20137, [ subclass( 'null_class', X ) ] )
% 4.57/4.96  , clause( 20138, [ ~( subclass( X, 'null_class' ) ), =( X, 'null_class' ) ]
% 4.57/4.96     )
% 4.57/4.96  , clause( 20139, [ =( X, 'null_class' ), member( 'not_subclass_element'( X
% 4.57/4.96    , 'null_class' ), X ) ] )
% 4.57/4.96  , clause( 20140, [ member( 'null_class', 'universal_class' ) ] )
% 4.57/4.96  , clause( 20141, [ =( 'unordered_pair'( X, Y ), 'unordered_pair'( Y, X ) )
% 4.57/4.96     ] )
% 4.57/4.96  , clause( 20142, [ subclass( singleton( X ), 'unordered_pair'( X, Y ) ) ]
% 4.57/4.96     )
% 4.57/4.96  , clause( 20143, [ subclass( singleton( X ), 'unordered_pair'( Y, X ) ) ]
% 4.57/4.96     )
% 4.57/4.96  , clause( 20144, [ member( X, 'universal_class' ), =( 'unordered_pair'( Y, 
% 4.57/4.96    X ), singleton( Y ) ) ] )
% 4.57/4.96  , clause( 20145, [ member( X, 'universal_class' ), =( 'unordered_pair'( X, 
% 4.57/4.96    Y ), singleton( Y ) ) ] )
% 4.57/4.96  , clause( 20146, [ =( 'unordered_pair'( X, Y ), 'null_class' ), member( X, 
% 4.57/4.96    'universal_class' ), member( Y, 'universal_class' ) ] )
% 4.57/4.96  , clause( 20147, [ ~( =( 'unordered_pair'( X, Y ), 'unordered_pair'( X, Z )
% 4.57/4.96     ) ), ~( member( 'ordered_pair'( Y, Z ), 'cross_product'( 
% 4.57/4.96    'universal_class', 'universal_class' ) ) ), =( Y, Z ) ] )
% 4.57/4.96  , clause( 20148, [ ~( =( 'unordered_pair'( X, Y ), 'unordered_pair'( Z, Y )
% 4.57/4.96     ) ), ~( member( 'ordered_pair'( X, Z ), 'cross_product'( 
% 4.57/4.96    'universal_class', 'universal_class' ) ) ), =( X, Z ) ] )
% 4.57/4.96  , clause( 20149, [ ~( member( X, 'universal_class' ) ), ~( =( 
% 4.57/4.96    'unordered_pair'( X, Y ), 'null_class' ) ) ] )
% 4.57/4.96  , clause( 20150, [ ~( member( X, 'universal_class' ) ), ~( =( 
% 4.57/4.96    'unordered_pair'( Y, X ), 'null_class' ) ) ] )
% 4.57/4.96  , clause( 20151, [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T
% 4.57/4.96     ) ) ), ~( =( 'unordered_pair'( X, Y ), 'null_class' ) ) ] )
% 4.57/4.96  , clause( 20152, [ ~( member( X, Y ) ), ~( member( Z, Y ) ), subclass( 
% 4.57/4.96    'unordered_pair'( X, Z ), Y ) ] )
% 4.57/4.96  , clause( 20153, [ member( singleton( X ), 'universal_class' ) ] )
% 4.57/4.96  , clause( 20154, [ member( singleton( X ), 'unordered_pair'( Y, singleton( 
% 4.57/4.96    X ) ) ) ] )
% 4.57/4.96  , clause( 20155, [ ~( member( X, 'universal_class' ) ), member( X, 
% 4.57/4.96    singleton( X ) ) ] )
% 4.57/4.96  , clause( 20156, [ ~( member( X, 'universal_class' ) ), ~( =( singleton( X
% 4.57/4.96     ), 'null_class' ) ) ] )
% 4.57/4.96  , clause( 20157, [ member( 'null_class', singleton( 'null_class' ) ) ] )
% 4.57/4.96  , clause( 20158, [ ~( member( X, singleton( Y ) ) ), =( X, Y ) ] )
% 4.57/4.96  , clause( 20159, [ member( X, 'universal_class' ), =( singleton( X ), 
% 4.57/4.96    'null_class' ) ] )
% 4.57/4.96  , clause( 20160, [ ~( =( singleton( X ), singleton( Y ) ) ), ~( member( X, 
% 4.57/4.96    'universal_class' ) ), =( X, Y ) ] )
% 4.57/4.96  , clause( 20161, [ ~( =( singleton( X ), singleton( Y ) ) ), ~( member( Y, 
% 4.57/4.96    'universal_class' ) ), =( X, Y ) ] )
% 4.57/4.96  , clause( 20162, [ ~( =( 'unordered_pair'( X, Y ), singleton( Z ) ) ), ~( 
% 4.57/4.96    member( Z, 'universal_class' ) ), =( Z, X ), =( Z, Y ) ] )
% 4.57/4.96  , clause( 20163, [ ~( member( X, 'universal_class' ) ), member( 'member_of'( 
% 4.57/4.96    singleton( X ) ), 'universal_class' ) ] )
% 4.57/4.96  , clause( 20164, [ ~( member( X, 'universal_class' ) ), =( singleton( 
% 4.57/4.96    'member_of'( singleton( X ) ) ), singleton( X ) ) ] )
% 4.57/4.96  , clause( 20165, [ member( 'member_of'( X ), 'universal_class' ), =( 
% 4.57/4.96    'member_of'( X ), X ) ] )
% 4.57/4.96  , clause( 20166, [ =( singleton( 'member_of'( X ) ), X ), =( 'member_of'( X
% 4.57/4.96     ), X ) ] )
% 4.57/4.96  , clause( 20167, [ ~( member( X, 'universal_class' ) ), =( 'member_of'( 
% 4.57/4.96    singleton( X ) ), X ) ] )
% 4.57/4.96  , clause( 20168, [ member( 'member_of1'( X ), 'universal_class' ), =( 
% 4.57/4.96    'member_of'( X ), X ) ] )
% 4.57/4.96  , clause( 20169, [ =( singleton( 'member_of1'( X ) ), X ), =( 'member_of'( 
% 4.57/4.96    X ), X ) ] )
% 4.57/4.96  , clause( 20170, [ ~( =( singleton( 'member_of'( X ) ), X ) ), member( X, 
% 4.57/4.96    'universal_class' ) ] )
% 4.57/4.96  , clause( 20171, [ ~( =( singleton( 'member_of'( X ) ), X ) ), ~( member( Y
% 4.57/4.96    , X ) ), =( 'member_of'( X ), Y ) ] )
% 4.57/4.96  , clause( 20172, [ ~( member( X, Y ) ), subclass( singleton( X ), Y ) ] )
% 4.57/4.96  , clause( 20173, [ ~( subclass( X, singleton( Y ) ) ), =( X, 'null_class' )
% 4.57/4.96    , =( singleton( Y ), X ) ] )
% 4.57/4.96  , clause( 20174, [ member( 'not_subclass_element'( intersection( complement( 
% 4.57/4.96    singleton( 'not_subclass_element'( X, 'null_class' ) ) ), X ), 
% 4.57/4.96    'null_class' ), intersection( complement( singleton( 
% 4.57/4.96    'not_subclass_element'( X, 'null_class' ) ) ), X ) ), =( singleton( 
% 4.57/4.96    'not_subclass_element'( X, 'null_class' ) ), X ), =( X, 'null_class' ) ]
% 4.57/4.96     )
% 4.57/4.96  , clause( 20175, [ member( 'not_subclass_element'( intersection( complement( 
% 4.57/4.96    singleton( 'not_subclass_element'( X, 'null_class' ) ) ), X ), 
% 4.57/4.96    'null_class' ), X ), =( singleton( 'not_subclass_element'( X, 
% 4.57/4.96    'null_class' ) ), X ), =( X, 'null_class' ) ] )
% 4.57/4.96  , clause( 20176, [ ~( =( 'not_subclass_element'( intersection( complement( 
% 4.57/4.96    singleton( 'not_subclass_element'( X, 'null_class' ) ) ), X ), 
% 4.57/4.96    'null_class' ), 'not_subclass_element'( X, 'null_class' ) ) ), =( 
% 4.57/4.96    singleton( 'not_subclass_element'( X, 'null_class' ) ), X ), =( X, 
% 4.57/4.96    'null_class' ) ] )
% 4.57/4.96  , clause( 20177, [ =( 'unordered_pair'( X, Y ), union( singleton( X ), 
% 4.57/4.96    singleton( Y ) ) ) ] )
% 4.57/4.96  , clause( 20178, [ member( 'ordered_pair'( X, Y ), 'universal_class' ) ] )
% 4.57/4.96  , clause( 20179, [ ~( member( 'unordered_pair'( x, singleton( y ) ), 
% 4.57/4.96    'ordered_pair'( x, y ) ) ) ] )
% 4.57/4.96  ] ).
% 4.57/4.96  
% 4.57/4.96  
% 4.57/4.96  
% 4.57/4.96  subsumption(
% 4.57/4.96  clause( 8, [ ~( member( X, 'universal_class' ) ), member( X, 
% 4.57/4.96    'unordered_pair'( Y, X ) ) ] )
% 4.57/4.96  , clause( 20043, [ ~( member( X, 'universal_class' ) ), member( X, 
% 4.57/4.96    'unordered_pair'( Y, X ) ) ] )
% 4.57/4.96  , substitution( 0, [ :=( X, X ), :=( Y, Y )] ), permutation( 0, [ ==>( 0, 0
% 4.57/4.96     ), ==>( 1, 1 )] ) ).
% 4.57/4.96  
% 4.57/4.96  
% 4.57/4.96  subsumption(
% 4.57/4.96  clause( 9, [ member( 'unordered_pair'( X, Y ), 'universal_class' ) ] )
% 4.57/4.96  , clause( 20044, [ member( 'unordered_pair'( X, Y ), 'universal_class' ) ]
% 4.57/4.96     )
% 4.57/4.96  , substitution( 0, [ :=( X, X ), :=( Y, Y )] ), permutation( 0, [ ==>( 0, 0
% 4.57/4.96     )] ) ).
% 4.57/4.96  
% 4.57/4.96  
% 4.57/4.96  subsumption(
% 4.57/4.96  clause( 11, [ =( 'unordered_pair'( singleton( X ), 'unordered_pair'( X, 
% 4.57/4.96    singleton( Y ) ) ), 'ordered_pair'( X, Y ) ) ] )
% 4.57/4.96  , clause( 20046, [ =( 'unordered_pair'( singleton( X ), 'unordered_pair'( X
% 4.57/4.96    , singleton( Y ) ) ), 'ordered_pair'( X, Y ) ) ] )
% 4.57/4.96  , substitution( 0, [ :=( X, X ), :=( Y, Y )] ), permutation( 0, [ ==>( 0, 0
% 4.57/4.96     )] ) ).
% 4.57/4.96  
% 4.57/4.96  
% 4.57/4.96  subsumption(
% 4.57/4.96  clause( 142, [ ~( member( 'unordered_pair'( x, singleton( y ) ), 
% 4.57/4.96    'ordered_pair'( x, y ) ) ) ] )
% 4.57/4.96  , clause( 20179, [ ~( member( 'unordered_pair'( x, singleton( y ) ), 
% 4.57/4.96    'ordered_pair'( x, y ) ) ) ] )
% 4.57/4.96  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 0 )] ) ).
% 4.57/4.96  
% 4.57/4.96  
% 4.57/4.96  paramod(
% 4.57/4.96  clause( 20330, [ member( 'unordered_pair'( X, singleton( Y ) ), 
% 4.57/4.96    'ordered_pair'( X, Y ) ), ~( member( 'unordered_pair'( X, singleton( Y )
% 4.57/4.96     ), 'universal_class' ) ) ] )
% 4.57/4.96  , clause( 11, [ =( 'unordered_pair'( singleton( X ), 'unordered_pair'( X, 
% 4.57/4.96    singleton( Y ) ) ), 'ordered_pair'( X, Y ) ) ] )
% 4.57/4.96  , 0, clause( 8, [ ~( member( X, 'universal_class' ) ), member( X, 
% 4.57/4.96    'unordered_pair'( Y, X ) ) ] )
% 4.57/4.96  , 1, 5, substitution( 0, [ :=( X, X ), :=( Y, Y )] ), substitution( 1, [ 
% 4.57/4.96    :=( X, 'unordered_pair'( X, singleton( Y ) ) ), :=( Y, singleton( X ) )] )
% 4.57/4.96    ).
% 4.57/4.96  
% 4.57/4.96  
% 4.57/4.96  resolution(
% 4.57/4.96  clause( 20331, [ member( 'unordered_pair'( X, singleton( Y ) ), 
% 4.57/4.96    'ordered_pair'( X, Y ) ) ] )
% 4.57/4.96  , clause( 20330, [ member( 'unordered_pair'( X, singleton( Y ) ), 
% 4.57/4.96    'ordered_pair'( X, Y ) ), ~( member( 'unordered_pair'( X, singleton( Y )
% 4.57/4.96     ), 'universal_class' ) ) ] )
% 4.57/4.96  , 1, clause( 9, [ member( 'unordered_pair'( X, Y ), 'universal_class' ) ]
% 4.57/4.96     )
% 4.57/4.96  , 0, substitution( 0, [ :=( X, X ), :=( Y, Y )] ), substitution( 1, [ :=( X
% 4.57/4.96    , X ), :=( Y, singleton( Y ) )] )).
% 4.57/4.96  
% 4.57/4.96  
% 4.57/4.96  subsumption(
% 4.57/4.96  clause( 563, [ member( 'unordered_pair'( X, singleton( Y ) ), 
% 4.57/4.96    'ordered_pair'( X, Y ) ) ] )
% 4.57/4.96  , clause( 20331, [ member( 'unordered_pair'( X, singleton( Y ) ), 
% 4.57/4.96    'ordered_pair'( X, Y ) ) ] )
% 4.57/4.96  , substitution( 0, [ :=( X, X ), :=( Y, Y )] ), permutation( 0, [ ==>( 0, 0
% 4.57/4.96     )] ) ).
% 4.57/4.96  
% 4.57/4.96  
% 4.57/4.96  resolution(
% 4.57/4.96  clause( 20332, [] )
% 4.57/4.96  , clause( 142, [ ~( member( 'unordered_pair'( x, singleton( y ) ), 
% 4.57/4.96    'ordered_pair'( x, y ) ) ) ] )
% 4.57/4.96  , 0, clause( 563, [ member( 'unordered_pair'( X, singleton( Y ) ), 
% 4.57/4.96    'ordered_pair'( X, Y ) ) ] )
% 4.57/4.96  , 0, substitution( 0, [] ), substitution( 1, [ :=( X, x ), :=( Y, y )] )
% 4.57/4.96    ).
% 4.57/4.96  
% 4.57/4.96  
% 4.57/4.96  subsumption(
% 4.57/4.96  clause( 20032, [] )
% 4.57/4.96  , clause( 20332, [] )
% 4.57/4.96  , substitution( 0, [] ), permutation( 0, [] ) ).
% 4.57/4.96  
% 4.57/4.96  
% 4.57/4.96  end.
% 4.57/4.96  
% 4.57/4.96  % ABCDEFGHIJKLMNOPQRSTUVWXYZ
% 4.57/4.96  
% 4.57/4.96  Memory use:
% 4.57/4.96  
% 4.57/4.96  space for terms:        355507
% 4.57/4.96  space for clauses:      912598
% 4.57/4.96  
% 4.57/4.96  
% 4.57/4.96  clauses generated:      61545
% 4.57/4.96  clauses kept:           20033
% 4.57/4.96  clauses selected:       490
% 4.57/4.96  clauses deleted:        1171
% 4.57/4.96  clauses inuse deleted:  53
% 4.57/4.96  
% 4.57/4.96  subsentry:          269094
% 4.57/4.96  literals s-matched: 209793
% 4.57/4.96  literals matched:   201926
% 4.57/4.96  full subsumption:   126469
% 4.57/4.96  
% 4.57/4.96  checksum:           -1323120820
% 4.57/4.96  
% 4.57/4.96  
% 4.57/4.96  Bliksem ended
%------------------------------------------------------------------------------