TSTP Solution File: SET101-7 by Bliksem---1.12

View Problem - Process Solution

%------------------------------------------------------------------------------
% File     : Bliksem---1.12
% Problem  : SET101-7 : TPTP v8.1.0. Bugfixed v2.1.0.
% Transfm  : none
% Format   : tptp:raw
% Command  : bliksem %s

% Computer : n021.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 22:47:06 EDT 2022

% Result   : Unsatisfiable 1.97s 2.39s
% Output   : Refutation 1.97s
% Verified : 
% SZS Type : -

% Comments : 
%------------------------------------------------------------------------------
%----WARNING: Could not form TPTP format derivation
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.11/0.12  % Problem  : SET101-7 : TPTP v8.1.0. Bugfixed v2.1.0.
% 0.11/0.12  % Command  : bliksem %s
% 0.12/0.33  % Computer : n021.cluster.edu
% 0.12/0.33  % Model    : x86_64 x86_64
% 0.12/0.33  % CPU      : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.12/0.33  % Memory   : 8042.1875MB
% 0.12/0.33  % OS       : Linux 3.10.0-693.el7.x86_64
% 0.12/0.33  % CPULimit : 300
% 0.12/0.33  % DateTime : Sat Jul  9 16:49:06 EDT 2022
% 0.12/0.34  % CPUTime  : 
% 0.43/1.10  *** allocated 10000 integers for termspace/termends
% 0.43/1.10  *** allocated 10000 integers for clauses
% 0.43/1.10  *** allocated 10000 integers for justifications
% 0.43/1.10  Bliksem 1.12
% 0.43/1.10  
% 0.43/1.10  
% 0.43/1.10  Automatic Strategy Selection
% 0.43/1.10  
% 0.43/1.10  Clauses:
% 0.43/1.10  [
% 0.43/1.10     [ ~( subclass( X, Y ) ), ~( member( Z, X ) ), member( Z, Y ) ],
% 0.43/1.10     [ member( 'not_subclass_element'( X, Y ), X ), subclass( X, Y ) ],
% 0.43/1.10     [ ~( member( 'not_subclass_element'( X, Y ), Y ) ), subclass( X, Y ) ]
% 0.43/1.10    ,
% 0.43/1.10     [ subclass( X, 'universal_class' ) ],
% 0.43/1.10     [ ~( =( X, Y ) ), subclass( X, Y ) ],
% 0.43/1.10     [ ~( =( X, Y ) ), subclass( Y, X ) ],
% 0.43/1.10     [ ~( subclass( X, Y ) ), ~( subclass( Y, X ) ), =( X, Y ) ],
% 0.43/1.10     [ ~( member( X, 'unordered_pair'( Y, Z ) ) ), =( X, Y ), =( X, Z ) ]
% 0.43/1.10    ,
% 0.43/1.10     [ ~( member( X, 'universal_class' ) ), member( X, 'unordered_pair'( X, Y
% 0.43/1.10     ) ) ],
% 0.43/1.10     [ ~( member( X, 'universal_class' ) ), member( X, 'unordered_pair'( Y, X
% 0.43/1.10     ) ) ],
% 0.43/1.10     [ member( 'unordered_pair'( X, Y ), 'universal_class' ) ],
% 0.43/1.10     [ =( 'unordered_pair'( X, X ), singleton( X ) ) ],
% 0.43/1.10     [ =( 'unordered_pair'( singleton( X ), 'unordered_pair'( X, singleton( Y
% 0.43/1.10     ) ) ), 'ordered_pair'( X, Y ) ) ],
% 0.43/1.10     [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T ) ) ), member( 
% 0.43/1.10    X, Z ) ],
% 0.43/1.10     [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T ) ) ), member( 
% 0.43/1.10    Y, T ) ],
% 0.43/1.10     [ ~( member( X, Y ) ), ~( member( Z, T ) ), member( 'ordered_pair'( X, Z
% 0.43/1.10     ), 'cross_product'( Y, T ) ) ],
% 0.43/1.10     [ ~( member( X, 'cross_product'( Y, Z ) ) ), =( 'ordered_pair'( first( X
% 0.43/1.10     ), second( X ) ), X ) ],
% 0.43/1.10     [ subclass( 'element_relation', 'cross_product'( 'universal_class', 
% 0.43/1.10    'universal_class' ) ) ],
% 0.43/1.10     [ ~( member( 'ordered_pair'( X, Y ), 'element_relation' ) ), member( X, 
% 0.43/1.10    Y ) ],
% 0.43/1.10     [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( 'universal_class'
% 0.43/1.10    , 'universal_class' ) ) ), ~( member( X, Y ) ), member( 'ordered_pair'( X
% 0.43/1.10    , Y ), 'element_relation' ) ],
% 0.43/1.10     [ ~( member( X, intersection( Y, Z ) ) ), member( X, Y ) ],
% 0.43/1.10     [ ~( member( X, intersection( Y, Z ) ) ), member( X, Z ) ],
% 0.43/1.10     [ ~( member( X, Y ) ), ~( member( X, Z ) ), member( X, intersection( Y, 
% 0.43/1.10    Z ) ) ],
% 0.43/1.10     [ ~( member( X, complement( Y ) ) ), ~( member( X, Y ) ) ],
% 0.43/1.10     [ ~( member( X, 'universal_class' ) ), member( X, complement( Y ) ), 
% 0.43/1.10    member( X, Y ) ],
% 0.43/1.10     [ =( complement( intersection( complement( X ), complement( Y ) ) ), 
% 0.43/1.10    union( X, Y ) ) ],
% 0.43/1.10     [ =( intersection( complement( intersection( X, Y ) ), complement( 
% 0.43/1.10    intersection( complement( X ), complement( Y ) ) ) ), 
% 0.43/1.10    'symmetric_difference'( X, Y ) ) ],
% 0.43/1.10     [ =( intersection( X, 'cross_product'( Y, Z ) ), restrict( X, Y, Z ) ) ]
% 0.43/1.10    ,
% 0.43/1.10     [ =( intersection( 'cross_product'( X, Y ), Z ), restrict( Z, X, Y ) ) ]
% 0.43/1.10    ,
% 0.43/1.10     [ ~( =( restrict( X, singleton( Y ), 'universal_class' ), 'null_class' )
% 0.43/1.10     ), ~( member( Y, 'domain_of'( X ) ) ) ],
% 0.43/1.10     [ ~( member( X, 'universal_class' ) ), =( restrict( Y, singleton( X ), 
% 0.43/1.10    'universal_class' ), 'null_class' ), member( X, 'domain_of'( Y ) ) ],
% 0.43/1.10     [ subclass( rotate( X ), 'cross_product'( 'cross_product'( 
% 0.43/1.10    'universal_class', 'universal_class' ), 'universal_class' ) ) ],
% 0.43/1.10     [ ~( member( 'ordered_pair'( 'ordered_pair'( X, Y ), Z ), rotate( T ) )
% 0.43/1.10     ), member( 'ordered_pair'( 'ordered_pair'( Y, Z ), X ), T ) ],
% 0.43/1.10     [ ~( member( 'ordered_pair'( 'ordered_pair'( X, Y ), Z ), T ) ), ~( 
% 0.43/1.10    member( 'ordered_pair'( 'ordered_pair'( Z, X ), Y ), 'cross_product'( 
% 0.43/1.10    'cross_product'( 'universal_class', 'universal_class' ), 
% 0.43/1.10    'universal_class' ) ) ), member( 'ordered_pair'( 'ordered_pair'( Z, X ), 
% 0.43/1.10    Y ), rotate( T ) ) ],
% 0.43/1.10     [ subclass( flip( X ), 'cross_product'( 'cross_product'( 
% 0.43/1.10    'universal_class', 'universal_class' ), 'universal_class' ) ) ],
% 0.43/1.10     [ ~( member( 'ordered_pair'( 'ordered_pair'( X, Y ), Z ), flip( T ) ) )
% 0.43/1.10    , member( 'ordered_pair'( 'ordered_pair'( Y, X ), Z ), T ) ],
% 0.43/1.10     [ ~( member( 'ordered_pair'( 'ordered_pair'( X, Y ), Z ), T ) ), ~( 
% 0.43/1.10    member( 'ordered_pair'( 'ordered_pair'( Y, X ), Z ), 'cross_product'( 
% 0.43/1.10    'cross_product'( 'universal_class', 'universal_class' ), 
% 0.43/1.10    'universal_class' ) ) ), member( 'ordered_pair'( 'ordered_pair'( Y, X ), 
% 0.43/1.10    Z ), flip( T ) ) ],
% 0.43/1.10     [ =( 'domain_of'( flip( 'cross_product'( X, 'universal_class' ) ) ), 
% 0.43/1.10    inverse( X ) ) ],
% 0.43/1.10     [ =( 'domain_of'( inverse( X ) ), 'range_of'( X ) ) ],
% 0.43/1.10     [ =( first( 'not_subclass_element'( restrict( X, Y, singleton( Z ) ), 
% 0.43/1.10    'null_class' ) ), domain( X, Y, Z ) ) ],
% 0.43/1.10     [ =( second( 'not_subclass_element'( restrict( X, singleton( Y ), Z ), 
% 0.43/1.10    'null_class' ) ), range( X, Y, Z ) ) ],
% 0.43/1.10     [ =( 'range_of'( restrict( X, Y, 'universal_class' ) ), image( X, Y ) )
% 0.43/1.10     ],
% 0.43/1.10     [ =( union( X, singleton( X ) ), successor( X ) ) ],
% 0.43/1.10     [ subclass( 'successor_relation', 'cross_product'( 'universal_class', 
% 0.43/1.10    'universal_class' ) ) ],
% 0.43/1.10     [ ~( member( 'ordered_pair'( X, Y ), 'successor_relation' ) ), =( 
% 0.43/1.10    successor( X ), Y ) ],
% 0.43/1.10     [ ~( =( successor( X ), Y ) ), ~( member( 'ordered_pair'( X, Y ), 
% 0.43/1.10    'cross_product'( 'universal_class', 'universal_class' ) ) ), member( 
% 0.43/1.10    'ordered_pair'( X, Y ), 'successor_relation' ) ],
% 0.43/1.10     [ ~( inductive( X ) ), member( 'null_class', X ) ],
% 0.43/1.10     [ ~( inductive( X ) ), subclass( image( 'successor_relation', X ), X ) ]
% 0.43/1.10    ,
% 0.43/1.10     [ ~( member( 'null_class', X ) ), ~( subclass( image( 
% 0.43/1.10    'successor_relation', X ), X ) ), inductive( X ) ],
% 0.43/1.10     [ inductive( omega ) ],
% 0.43/1.10     [ ~( inductive( X ) ), subclass( omega, X ) ],
% 0.43/1.10     [ member( omega, 'universal_class' ) ],
% 0.43/1.10     [ =( 'domain_of'( restrict( 'element_relation', 'universal_class', X ) )
% 0.43/1.10    , 'sum_class'( X ) ) ],
% 0.43/1.10     [ ~( member( X, 'universal_class' ) ), member( 'sum_class'( X ), 
% 0.43/1.10    'universal_class' ) ],
% 0.43/1.10     [ =( complement( image( 'element_relation', complement( X ) ) ), 
% 0.43/1.10    'power_class'( X ) ) ],
% 0.43/1.10     [ ~( member( X, 'universal_class' ) ), member( 'power_class'( X ), 
% 0.43/1.10    'universal_class' ) ],
% 0.43/1.10     [ subclass( compose( X, Y ), 'cross_product'( 'universal_class', 
% 0.43/1.10    'universal_class' ) ) ],
% 0.43/1.10     [ ~( member( 'ordered_pair'( X, Y ), compose( Z, T ) ) ), member( Y, 
% 0.43/1.10    image( Z, image( T, singleton( X ) ) ) ) ],
% 0.43/1.10     [ ~( member( X, image( Y, image( Z, singleton( T ) ) ) ) ), ~( member( 
% 0.43/1.10    'ordered_pair'( T, X ), 'cross_product'( 'universal_class', 
% 0.43/1.10    'universal_class' ) ) ), member( 'ordered_pair'( T, X ), compose( Y, Z )
% 0.43/1.10     ) ],
% 0.43/1.10     [ ~( 'single_valued_class'( X ) ), subclass( compose( X, inverse( X ) )
% 0.43/1.10    , 'identity_relation' ) ],
% 0.43/1.10     [ ~( subclass( compose( X, inverse( X ) ), 'identity_relation' ) ), 
% 0.43/1.10    'single_valued_class'( X ) ],
% 0.43/1.10     [ ~( function( X ) ), subclass( X, 'cross_product'( 'universal_class', 
% 0.43/1.10    'universal_class' ) ) ],
% 0.43/1.10     [ ~( function( X ) ), subclass( compose( X, inverse( X ) ), 
% 0.43/1.10    'identity_relation' ) ],
% 0.43/1.10     [ ~( subclass( X, 'cross_product'( 'universal_class', 'universal_class'
% 0.43/1.10     ) ) ), ~( subclass( compose( X, inverse( X ) ), 'identity_relation' ) )
% 0.43/1.10    , function( X ) ],
% 0.43/1.10     [ ~( function( X ) ), ~( member( Y, 'universal_class' ) ), member( image( 
% 0.43/1.10    X, Y ), 'universal_class' ) ],
% 0.43/1.10     [ =( X, 'null_class' ), member( regular( X ), X ) ],
% 0.43/1.10     [ =( X, 'null_class' ), =( intersection( X, regular( X ) ), 'null_class'
% 0.43/1.10     ) ],
% 0.43/1.10     [ =( 'sum_class'( image( X, singleton( Y ) ) ), apply( X, Y ) ) ],
% 0.43/1.10     [ function( choice ) ],
% 0.43/1.10     [ ~( member( X, 'universal_class' ) ), =( X, 'null_class' ), member( 
% 0.43/1.10    apply( choice, X ), X ) ],
% 0.43/1.10     [ ~( 'one_to_one'( X ) ), function( X ) ],
% 0.43/1.10     [ ~( 'one_to_one'( X ) ), function( inverse( X ) ) ],
% 0.43/1.10     [ ~( function( inverse( X ) ) ), ~( function( X ) ), 'one_to_one'( X ) ]
% 0.43/1.10    ,
% 0.43/1.10     [ =( intersection( 'cross_product'( 'universal_class', 'universal_class'
% 0.43/1.10     ), intersection( 'cross_product'( 'universal_class', 'universal_class' )
% 0.43/1.10    , complement( compose( complement( 'element_relation' ), inverse( 
% 0.43/1.10    'element_relation' ) ) ) ) ), 'subset_relation' ) ],
% 0.43/1.10     [ =( intersection( inverse( 'subset_relation' ), 'subset_relation' ), 
% 0.43/1.10    'identity_relation' ) ],
% 0.43/1.10     [ =( complement( 'domain_of'( intersection( X, 'identity_relation' ) ) )
% 0.43/1.10    , diagonalise( X ) ) ],
% 0.43/1.10     [ =( intersection( 'domain_of'( X ), diagonalise( compose( inverse( 
% 0.43/1.10    'element_relation' ), X ) ) ), cantor( X ) ) ],
% 0.43/1.10     [ ~( operation( X ) ), function( X ) ],
% 0.43/1.10     [ ~( operation( X ) ), =( 'cross_product'( 'domain_of'( 'domain_of'( X )
% 0.43/1.10     ), 'domain_of'( 'domain_of'( X ) ) ), 'domain_of'( X ) ) ],
% 0.43/1.10     [ ~( operation( X ) ), subclass( 'range_of'( X ), 'domain_of'( 
% 0.43/1.10    'domain_of'( X ) ) ) ],
% 0.43/1.10     [ ~( function( X ) ), ~( =( 'cross_product'( 'domain_of'( 'domain_of'( X
% 0.43/1.10     ) ), 'domain_of'( 'domain_of'( X ) ) ), 'domain_of'( X ) ) ), ~( 
% 0.43/1.10    subclass( 'range_of'( X ), 'domain_of'( 'domain_of'( X ) ) ) ), operation( 
% 0.43/1.10    X ) ],
% 0.43/1.10     [ ~( compatible( X, Y, Z ) ), function( X ) ],
% 0.43/1.10     [ ~( compatible( X, Y, Z ) ), =( 'domain_of'( 'domain_of'( Y ) ), 
% 0.43/1.10    'domain_of'( X ) ) ],
% 0.43/1.10     [ ~( compatible( X, Y, Z ) ), subclass( 'range_of'( X ), 'domain_of'( 
% 0.43/1.10    'domain_of'( Z ) ) ) ],
% 0.43/1.10     [ ~( function( X ) ), ~( =( 'domain_of'( 'domain_of'( Y ) ), 'domain_of'( 
% 0.43/1.10    X ) ) ), ~( subclass( 'range_of'( X ), 'domain_of'( 'domain_of'( Z ) ) )
% 0.43/1.10     ), compatible( X, Y, Z ) ],
% 0.43/1.10     [ ~( homomorphism( X, Y, Z ) ), operation( Y ) ],
% 0.43/1.10     [ ~( homomorphism( X, Y, Z ) ), operation( Z ) ],
% 0.43/1.10     [ ~( homomorphism( X, Y, Z ) ), compatible( X, Y, Z ) ],
% 0.43/1.10     [ ~( homomorphism( X, Y, Z ) ), ~( member( 'ordered_pair'( T, U ), 
% 0.43/1.10    'domain_of'( Y ) ) ), =( apply( Z, 'ordered_pair'( apply( X, T ), apply( 
% 0.43/1.10    X, U ) ) ), apply( X, apply( Y, 'ordered_pair'( T, U ) ) ) ) ],
% 0.43/1.10     [ ~( operation( X ) ), ~( operation( Y ) ), ~( compatible( Z, X, Y ) ), 
% 0.43/1.10    member( 'ordered_pair'( 'not_homomorphism1'( Z, X, Y ), 
% 0.43/1.10    'not_homomorphism2'( Z, X, Y ) ), 'domain_of'( X ) ), homomorphism( Z, X
% 0.43/1.10    , Y ) ],
% 0.43/1.10     [ ~( operation( X ) ), ~( operation( Y ) ), ~( compatible( Z, X, Y ) ), 
% 0.43/1.10    ~( =( apply( Y, 'ordered_pair'( apply( Z, 'not_homomorphism1'( Z, X, Y )
% 0.43/1.10     ), apply( Z, 'not_homomorphism2'( Z, X, Y ) ) ) ), apply( Z, apply( X, 
% 0.43/1.10    'ordered_pair'( 'not_homomorphism1'( Z, X, Y ), 'not_homomorphism2'( Z, X
% 0.43/1.10    , Y ) ) ) ) ) ), homomorphism( Z, X, Y ) ],
% 0.43/1.10     [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T ) ) ), member( 
% 0.43/1.10    X, 'unordered_pair'( X, Y ) ) ],
% 0.43/1.10     [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T ) ) ), member( 
% 0.43/1.10    Y, 'unordered_pair'( X, Y ) ) ],
% 0.43/1.10     [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T ) ) ), member( 
% 0.43/1.10    X, 'universal_class' ) ],
% 0.43/1.10     [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T ) ) ), member( 
% 0.43/1.10    Y, 'universal_class' ) ],
% 0.43/1.10     [ subclass( X, X ) ],
% 0.43/1.10     [ ~( subclass( X, Y ) ), ~( subclass( Y, Z ) ), subclass( X, Z ) ],
% 0.43/1.10     [ =( X, Y ), member( 'not_subclass_element'( X, Y ), X ), member( 
% 0.43/1.10    'not_subclass_element'( Y, X ), Y ) ],
% 0.43/1.10     [ ~( member( 'not_subclass_element'( X, Y ), Y ) ), =( X, Y ), member( 
% 0.43/1.10    'not_subclass_element'( Y, X ), Y ) ],
% 0.43/1.10     [ ~( member( 'not_subclass_element'( X, Y ), Y ) ), =( Y, X ), member( 
% 0.43/1.10    'not_subclass_element'( Y, X ), Y ) ],
% 0.43/1.10     [ ~( member( 'not_subclass_element'( X, Y ), Y ) ), ~( member( 
% 0.43/1.10    'not_subclass_element'( Y, X ), X ) ), =( X, Y ) ],
% 0.43/1.10     [ ~( member( X, intersection( complement( Y ), Y ) ) ) ],
% 0.43/1.10     [ ~( member( X, 'null_class' ) ) ],
% 0.43/1.10     [ subclass( 'null_class', X ) ],
% 0.43/1.10     [ ~( subclass( X, 'null_class' ) ), =( X, 'null_class' ) ],
% 0.43/1.10     [ =( X, 'null_class' ), member( 'not_subclass_element'( X, 'null_class'
% 0.43/1.10     ), X ) ],
% 0.43/1.10     [ member( 'null_class', 'universal_class' ) ],
% 0.43/1.10     [ =( 'unordered_pair'( X, Y ), 'unordered_pair'( Y, X ) ) ],
% 0.43/1.10     [ subclass( singleton( X ), 'unordered_pair'( X, Y ) ) ],
% 0.43/1.10     [ subclass( singleton( X ), 'unordered_pair'( Y, X ) ) ],
% 0.43/1.10     [ member( X, 'universal_class' ), =( 'unordered_pair'( Y, X ), singleton( 
% 0.43/1.10    Y ) ) ],
% 0.43/1.10     [ member( X, 'universal_class' ), =( 'unordered_pair'( X, Y ), singleton( 
% 0.43/1.10    Y ) ) ],
% 0.43/1.10     [ =( 'unordered_pair'( X, Y ), 'null_class' ), member( X, 
% 0.43/1.10    'universal_class' ), member( Y, 'universal_class' ) ],
% 0.43/1.10     [ ~( =( 'unordered_pair'( X, Y ), 'unordered_pair'( X, Z ) ) ), ~( 
% 0.43/1.10    member( 'ordered_pair'( Y, Z ), 'cross_product'( 'universal_class', 
% 0.43/1.10    'universal_class' ) ) ), =( Y, Z ) ],
% 0.43/1.10     [ ~( =( 'unordered_pair'( X, Y ), 'unordered_pair'( Z, Y ) ) ), ~( 
% 0.43/1.10    member( 'ordered_pair'( X, Z ), 'cross_product'( 'universal_class', 
% 0.43/1.10    'universal_class' ) ) ), =( X, Z ) ],
% 0.43/1.10     [ ~( member( X, 'universal_class' ) ), ~( =( 'unordered_pair'( X, Y ), 
% 0.43/1.10    'null_class' ) ) ],
% 0.43/1.10     [ ~( member( X, 'universal_class' ) ), ~( =( 'unordered_pair'( Y, X ), 
% 0.43/1.10    'null_class' ) ) ],
% 0.43/1.10     [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T ) ) ), ~( =( 
% 0.43/1.10    'unordered_pair'( X, Y ), 'null_class' ) ) ],
% 1.97/2.39     [ ~( member( X, Y ) ), ~( member( Z, Y ) ), subclass( 'unordered_pair'( 
% 1.97/2.39    X, Z ), Y ) ],
% 1.97/2.39     [ member( singleton( X ), 'universal_class' ) ],
% 1.97/2.39     [ member( singleton( X ), 'unordered_pair'( Y, singleton( X ) ) ) ],
% 1.97/2.39     [ ~( member( X, 'universal_class' ) ), member( X, singleton( X ) ) ]
% 1.97/2.39    ,
% 1.97/2.39     [ ~( member( X, 'universal_class' ) ), ~( =( singleton( X ), 
% 1.97/2.39    'null_class' ) ) ],
% 1.97/2.39     [ member( 'null_class', singleton( 'null_class' ) ) ],
% 1.97/2.39     [ ~( member( X, singleton( Y ) ) ), =( X, Y ) ],
% 1.97/2.39     [ member( X, 'universal_class' ), =( singleton( X ), 'null_class' ) ]
% 1.97/2.39    ,
% 1.97/2.39     [ ~( =( singleton( X ), singleton( Y ) ) ), ~( member( X, 
% 1.97/2.39    'universal_class' ) ), =( X, Y ) ],
% 1.97/2.39     [ ~( =( singleton( X ), singleton( Y ) ) ), ~( member( Y, 
% 1.97/2.39    'universal_class' ) ), =( X, Y ) ],
% 1.97/2.39     [ ~( =( 'unordered_pair'( X, Y ), singleton( Z ) ) ), ~( member( Z, 
% 1.97/2.39    'universal_class' ) ), =( Z, X ), =( Z, Y ) ],
% 1.97/2.39     [ ~( member( X, 'universal_class' ) ), member( 'member_of'( singleton( X
% 1.97/2.39     ) ), 'universal_class' ) ],
% 1.97/2.39     [ ~( member( X, 'universal_class' ) ), =( singleton( 'member_of'( 
% 1.97/2.39    singleton( X ) ) ), singleton( X ) ) ],
% 1.97/2.39     [ member( 'member_of'( X ), 'universal_class' ), =( 'member_of'( X ), X
% 1.97/2.39     ) ],
% 1.97/2.39     [ =( singleton( 'member_of'( X ) ), X ), =( 'member_of'( X ), X ) ],
% 1.97/2.39     [ ~( member( X, 'universal_class' ) ), =( 'member_of'( singleton( X ) )
% 1.97/2.39    , X ) ],
% 1.97/2.39     [ member( 'member_of1'( X ), 'universal_class' ), =( 'member_of'( X ), X
% 1.97/2.39     ) ],
% 1.97/2.39     [ =( singleton( 'member_of1'( X ) ), X ), =( 'member_of'( X ), X ) ]
% 1.97/2.39    ,
% 1.97/2.39     [ ~( =( singleton( 'member_of'( X ) ), X ) ), member( X, 
% 1.97/2.39    'universal_class' ) ],
% 1.97/2.39     [ ~( =( singleton( 'member_of'( X ) ), X ) ), ~( member( Y, X ) ), =( 
% 1.97/2.39    'member_of'( X ), Y ) ],
% 1.97/2.39     [ ~( member( X, Y ) ), subclass( singleton( X ), Y ) ],
% 1.97/2.39     [ ~( subclass( X, singleton( Y ) ) ), =( X, 'null_class' ), =( singleton( 
% 1.97/2.39    Y ), X ) ],
% 1.97/2.39     [ member( 'not_subclass_element'( intersection( complement( singleton( 
% 1.97/2.39    'not_subclass_element'( X, 'null_class' ) ) ), X ), 'null_class' ), 
% 1.97/2.39    intersection( complement( singleton( 'not_subclass_element'( X, 
% 1.97/2.39    'null_class' ) ) ), X ) ), =( singleton( 'not_subclass_element'( X, 
% 1.97/2.39    'null_class' ) ), X ), =( X, 'null_class' ) ],
% 1.97/2.39     [ member( 'not_subclass_element'( intersection( complement( singleton( 
% 1.97/2.39    'not_subclass_element'( X, 'null_class' ) ) ), X ), 'null_class' ), X ), 
% 1.97/2.39    =( singleton( 'not_subclass_element'( X, 'null_class' ) ), X ), =( X, 
% 1.97/2.39    'null_class' ) ],
% 1.97/2.39     [ ~( =( 'not_subclass_element'( intersection( complement( singleton( 
% 1.97/2.39    'not_subclass_element'( X, 'null_class' ) ) ), X ), 'null_class' ), 
% 1.97/2.39    'not_subclass_element'( X, 'null_class' ) ) ), =( singleton( 
% 1.97/2.39    'not_subclass_element'( X, 'null_class' ) ), X ), =( X, 'null_class' ) ]
% 1.97/2.39    ,
% 1.97/2.39     [ =( 'unordered_pair'( X, Y ), union( singleton( X ), singleton( Y ) ) )
% 1.97/2.39     ],
% 1.97/2.39     [ member( 'ordered_pair'( X, Y ), 'universal_class' ) ],
% 1.97/2.39     [ ~( member( singleton( x ), 'ordered_pair'( x, y ) ) ) ]
% 1.97/2.39  ] .
% 1.97/2.39  
% 1.97/2.39  
% 1.97/2.39  percentage equality = 0.294915, percentage horn = 0.828767
% 1.97/2.39  This is a problem with some equality
% 1.97/2.39  
% 1.97/2.39  
% 1.97/2.39  
% 1.97/2.39  Options Used:
% 1.97/2.39  
% 1.97/2.39  useres =            1
% 1.97/2.39  useparamod =        1
% 1.97/2.39  useeqrefl =         1
% 1.97/2.39  useeqfact =         1
% 1.97/2.39  usefactor =         1
% 1.97/2.39  usesimpsplitting =  0
% 1.97/2.39  usesimpdemod =      5
% 1.97/2.39  usesimpres =        3
% 1.97/2.39  
% 1.97/2.39  resimpinuse      =  1000
% 1.97/2.39  resimpclauses =     20000
% 1.97/2.39  substype =          eqrewr
% 1.97/2.39  backwardsubs =      1
% 1.97/2.39  selectoldest =      5
% 1.97/2.39  
% 1.97/2.39  litorderings [0] =  split
% 1.97/2.39  litorderings [1] =  extend the termordering, first sorting on arguments
% 1.97/2.39  
% 1.97/2.39  termordering =      kbo
% 1.97/2.39  
% 1.97/2.39  litapriori =        0
% 1.97/2.39  termapriori =       1
% 1.97/2.39  litaposteriori =    0
% 1.97/2.39  termaposteriori =   0
% 1.97/2.39  demodaposteriori =  0
% 1.97/2.39  ordereqreflfact =   0
% 1.97/2.39  
% 1.97/2.39  litselect =         negord
% 1.97/2.39  
% 1.97/2.39  maxweight =         15
% 1.97/2.39  maxdepth =          30000
% 1.97/2.39  maxlength =         115
% 1.97/2.39  maxnrvars =         195
% 1.97/2.39  excuselevel =       1
% 1.97/2.39  increasemaxweight = 1
% 1.97/2.39  
% 1.97/2.39  maxselected =       10000000
% 1.97/2.39  maxnrclauses =      10000000
% 1.97/2.39  
% 1.97/2.39  showgenerated =    0
% 1.97/2.39  showkept =         0
% 1.97/2.39  showselected =     0
% 1.97/2.39  showdeleted =      0
% 1.97/2.39  showresimp =       1
% 1.97/2.39  showstatus =       2000
% 1.97/2.39  
% 1.97/2.39  prologoutput =     1
% 1.97/2.39  nrgoals =          5000000
% 1.97/2.39  totalproof =       1
% 1.97/2.39  
% 1.97/2.39  Symbols occurring in the translation:
% 1.97/2.39  
% 1.97/2.39  {}  [0, 0]      (w:1, o:2, a:1, s:1, b:0), 
% 1.97/2.39  .  [1, 2]      (w:1, o:58, a:1, s:1, b:0), 
% 1.97/2.39  !  [4, 1]      (w:0, o:31, a:1, s:1, b:0), 
% 1.97/2.39  =  [13, 2]      (w:1, o:0, a:0, s:1, b:0), 
% 1.97/2.39  ==>  [14, 2]      (w:1, o:0, a:0, s:1, b:0), 
% 1.97/2.39  subclass  [41, 2]      (w:1, o:83, a:1, s:1, b:0), 
% 1.97/2.39  member  [43, 2]      (w:1, o:84, a:1, s:1, b:0), 
% 1.97/2.39  'not_subclass_element'  [44, 2]      (w:1, o:85, a:1, s:1, b:0), 
% 1.97/2.39  'universal_class'  [45, 0]      (w:1, o:21, a:1, s:1, b:0), 
% 1.97/2.39  'unordered_pair'  [46, 2]      (w:1, o:86, a:1, s:1, b:0), 
% 1.97/2.39  singleton  [47, 1]      (w:1, o:39, a:1, s:1, b:0), 
% 1.97/2.39  'ordered_pair'  [48, 2]      (w:1, o:87, a:1, s:1, b:0), 
% 1.97/2.39  'cross_product'  [50, 2]      (w:1, o:88, a:1, s:1, b:0), 
% 1.97/2.39  first  [52, 1]      (w:1, o:40, a:1, s:1, b:0), 
% 1.97/2.39  second  [53, 1]      (w:1, o:41, a:1, s:1, b:0), 
% 1.97/2.39  'element_relation'  [54, 0]      (w:1, o:25, a:1, s:1, b:0), 
% 1.97/2.39  intersection  [55, 2]      (w:1, o:90, a:1, s:1, b:0), 
% 1.97/2.39  complement  [56, 1]      (w:1, o:42, a:1, s:1, b:0), 
% 1.97/2.39  union  [57, 2]      (w:1, o:91, a:1, s:1, b:0), 
% 1.97/2.39  'symmetric_difference'  [58, 2]      (w:1, o:92, a:1, s:1, b:0), 
% 1.97/2.39  restrict  [60, 3]      (w:1, o:95, a:1, s:1, b:0), 
% 1.97/2.39  'null_class'  [61, 0]      (w:1, o:26, a:1, s:1, b:0), 
% 1.97/2.39  'domain_of'  [62, 1]      (w:1, o:44, a:1, s:1, b:0), 
% 1.97/2.39  rotate  [63, 1]      (w:1, o:36, a:1, s:1, b:0), 
% 1.97/2.39  flip  [65, 1]      (w:1, o:45, a:1, s:1, b:0), 
% 1.97/2.39  inverse  [66, 1]      (w:1, o:46, a:1, s:1, b:0), 
% 1.97/2.39  'range_of'  [67, 1]      (w:1, o:37, a:1, s:1, b:0), 
% 1.97/2.39  domain  [68, 3]      (w:1, o:97, a:1, s:1, b:0), 
% 1.97/2.39  range  [69, 3]      (w:1, o:98, a:1, s:1, b:0), 
% 1.97/2.39  image  [70, 2]      (w:1, o:89, a:1, s:1, b:0), 
% 1.97/2.39  successor  [71, 1]      (w:1, o:47, a:1, s:1, b:0), 
% 1.97/2.39  'successor_relation'  [72, 0]      (w:1, o:6, a:1, s:1, b:0), 
% 1.97/2.39  inductive  [73, 1]      (w:1, o:48, a:1, s:1, b:0), 
% 1.97/2.39  omega  [74, 0]      (w:1, o:9, a:1, s:1, b:0), 
% 1.97/2.39  'sum_class'  [75, 1]      (w:1, o:49, a:1, s:1, b:0), 
% 1.97/2.39  'power_class'  [76, 1]      (w:1, o:52, a:1, s:1, b:0), 
% 1.97/2.39  compose  [78, 2]      (w:1, o:93, a:1, s:1, b:0), 
% 1.97/2.39  'single_valued_class'  [79, 1]      (w:1, o:53, a:1, s:1, b:0), 
% 1.97/2.39  'identity_relation'  [80, 0]      (w:1, o:27, a:1, s:1, b:0), 
% 1.97/2.39  function  [82, 1]      (w:1, o:54, a:1, s:1, b:0), 
% 1.97/2.39  regular  [83, 1]      (w:1, o:38, a:1, s:1, b:0), 
% 1.97/2.39  apply  [84, 2]      (w:1, o:94, a:1, s:1, b:0), 
% 1.97/2.39  choice  [85, 0]      (w:1, o:28, a:1, s:1, b:0), 
% 1.97/2.39  'one_to_one'  [86, 1]      (w:1, o:50, a:1, s:1, b:0), 
% 1.97/2.39  'subset_relation'  [87, 0]      (w:1, o:5, a:1, s:1, b:0), 
% 1.97/2.39  diagonalise  [88, 1]      (w:1, o:55, a:1, s:1, b:0), 
% 1.97/2.39  cantor  [89, 1]      (w:1, o:43, a:1, s:1, b:0), 
% 1.97/2.39  operation  [90, 1]      (w:1, o:51, a:1, s:1, b:0), 
% 1.97/2.39  compatible  [94, 3]      (w:1, o:96, a:1, s:1, b:0), 
% 1.97/2.39  homomorphism  [95, 3]      (w:1, o:99, a:1, s:1, b:0), 
% 1.97/2.39  'not_homomorphism1'  [96, 3]      (w:1, o:100, a:1, s:1, b:0), 
% 1.97/2.39  'not_homomorphism2'  [97, 3]      (w:1, o:101, a:1, s:1, b:0), 
% 1.97/2.39  'member_of'  [98, 1]      (w:1, o:56, a:1, s:1, b:0), 
% 1.97/2.39  'member_of1'  [99, 1]      (w:1, o:57, a:1, s:1, b:0), 
% 1.97/2.39  x  [100, 0]      (w:1, o:29, a:1, s:1, b:0), 
% 1.97/2.39  y  [101, 0]      (w:1, o:30, a:1, s:1, b:0).
% 1.97/2.39  
% 1.97/2.39  
% 1.97/2.39  Starting Search:
% 1.97/2.39  
% 1.97/2.39  Resimplifying inuse:
% 1.97/2.39  Done
% 1.97/2.39  
% 1.97/2.39  
% 1.97/2.39  Intermediate Status:
% 1.97/2.39  Generated:    4171
% 1.97/2.39  Kept:         2009
% 1.97/2.39  Inuse:        121
% 1.97/2.39  Deleted:      5
% 1.97/2.39  Deletedinuse: 2
% 1.97/2.39  
% 1.97/2.39  Resimplifying inuse:
% 1.97/2.39  Done
% 1.97/2.39  
% 1.97/2.39  Resimplifying inuse:
% 1.97/2.39  Done
% 1.97/2.39  
% 1.97/2.39  
% 1.97/2.39  Intermediate Status:
% 1.97/2.39  Generated:    9978
% 1.97/2.39  Kept:         4012
% 1.97/2.39  Inuse:        195
% 1.97/2.39  Deleted:      10
% 1.97/2.39  Deletedinuse: 4
% 1.97/2.39  
% 1.97/2.39  Resimplifying inuse:
% 1.97/2.39  Done
% 1.97/2.39  
% 1.97/2.39  Resimplifying inuse:
% 1.97/2.39  Done
% 1.97/2.39  
% 1.97/2.39  
% 1.97/2.39  Intermediate Status:
% 1.97/2.39  Generated:    15176
% 1.97/2.39  Kept:         6016
% 1.97/2.39  Inuse:        275
% 1.97/2.39  Deleted:      57
% 1.97/2.39  Deletedinuse: 39
% 1.97/2.39  
% 1.97/2.39  Resimplifying inuse:
% 1.97/2.39  Done
% 1.97/2.39  
% 1.97/2.39  Resimplifying inuse:
% 1.97/2.39  Done
% 1.97/2.39  
% 1.97/2.39  
% 1.97/2.39  Intermediate Status:
% 1.97/2.39  Generated:    20704
% 1.97/2.39  Kept:         8035
% 1.97/2.39  Inuse:        355
% 1.97/2.39  Deleted:      65
% 1.97/2.39  Deletedinuse: 45
% 1.97/2.39  
% 1.97/2.39  Resimplifying inuse:
% 1.97/2.39  Done
% 1.97/2.39  
% 1.97/2.39  Resimplifying inuse:
% 1.97/2.39  Done
% 1.97/2.39  
% 1.97/2.39  
% 1.97/2.39  Intermediate Status:
% 1.97/2.39  Generated:    27139
% 1.97/2.39  Kept:         10119
% 1.97/2.39  Inuse:        391
% 1.97/2.39  Deleted:      65
% 1.97/2.39  Deletedinuse: 45
% 1.97/2.39  
% 1.97/2.39  Resimplifying inuse:
% 1.97/2.39  Done
% 1.97/2.39  
% 1.97/2.39  Resimplifying inuse:
% 1.97/2.39  Done
% 1.97/2.39  
% 1.97/2.39  
% 1.97/2.39  Intermediate Status:
% 1.97/2.39  Generated:    36642
% 1.97/2.39  Kept:         12189
% 1.97/2.39  Inuse:        430
% 1.97/2.39  Deleted:      67
% 1.97/2.39  Deletedinuse: 46
% 1.97/2.39  
% 1.97/2.39  Resimplifying inuse:
% 1.97/2.39  Done
% 1.97/2.39  
% 1.97/2.39  
% 1.97/2.39  Bliksems!, er is een bewijs:
% 1.97/2.39  % SZS status Unsatisfiable
% 1.97/2.39  % SZS output start Refutation
% 1.97/2.39  
% 1.97/2.39  clause( 7, [ ~( member( X, 'universal_class' ) ), member( X, 
% 1.97/2.39    'unordered_pair'( X, Y ) ) ] )
% 1.97/2.39  .
% 1.97/2.39  clause( 11, [ =( 'unordered_pair'( singleton( X ), 'unordered_pair'( X, 
% 1.97/2.39    singleton( Y ) ) ), 'ordered_pair'( X, Y ) ) ] )
% 1.97/2.39  .
% 1.97/2.39  clause( 117, [ member( singleton( X ), 'universal_class' ) ] )
% 1.97/2.39  .
% 1.97/2.39  clause( 142, [ ~( member( singleton( x ), 'ordered_pair'( x, y ) ) ) ] )
% 1.97/2.39  .
% 1.97/2.39  clause( 564, [ member( singleton( X ), 'ordered_pair'( X, Y ) ) ] )
% 1.97/2.39  .
% 1.97/2.39  clause( 13737, [] )
% 1.97/2.39  .
% 1.97/2.39  
% 1.97/2.39  
% 1.97/2.39  % SZS output end Refutation
% 1.97/2.39  found a proof!
% 1.97/2.39  
% 1.97/2.39  % ABCDEFGHIJKLMNOPQRSTUVWXYZ
% 1.97/2.39  
% 1.97/2.39  initialclauses(
% 1.97/2.39  [ clause( 13739, [ ~( subclass( X, Y ) ), ~( member( Z, X ) ), member( Z, Y
% 1.97/2.39     ) ] )
% 1.97/2.39  , clause( 13740, [ member( 'not_subclass_element'( X, Y ), X ), subclass( X
% 1.97/2.39    , Y ) ] )
% 1.97/2.39  , clause( 13741, [ ~( member( 'not_subclass_element'( X, Y ), Y ) ), 
% 1.97/2.39    subclass( X, Y ) ] )
% 1.97/2.39  , clause( 13742, [ subclass( X, 'universal_class' ) ] )
% 1.97/2.39  , clause( 13743, [ ~( =( X, Y ) ), subclass( X, Y ) ] )
% 1.97/2.39  , clause( 13744, [ ~( =( X, Y ) ), subclass( Y, X ) ] )
% 1.97/2.39  , clause( 13745, [ ~( subclass( X, Y ) ), ~( subclass( Y, X ) ), =( X, Y )
% 1.97/2.39     ] )
% 1.97/2.39  , clause( 13746, [ ~( member( X, 'unordered_pair'( Y, Z ) ) ), =( X, Y ), 
% 1.97/2.39    =( X, Z ) ] )
% 1.97/2.39  , clause( 13747, [ ~( member( X, 'universal_class' ) ), member( X, 
% 1.97/2.39    'unordered_pair'( X, Y ) ) ] )
% 1.97/2.39  , clause( 13748, [ ~( member( X, 'universal_class' ) ), member( X, 
% 1.97/2.39    'unordered_pair'( Y, X ) ) ] )
% 1.97/2.39  , clause( 13749, [ member( 'unordered_pair'( X, Y ), 'universal_class' ) ]
% 1.97/2.39     )
% 1.97/2.39  , clause( 13750, [ =( 'unordered_pair'( X, X ), singleton( X ) ) ] )
% 1.97/2.39  , clause( 13751, [ =( 'unordered_pair'( singleton( X ), 'unordered_pair'( X
% 1.97/2.39    , singleton( Y ) ) ), 'ordered_pair'( X, Y ) ) ] )
% 1.97/2.39  , clause( 13752, [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T
% 1.97/2.39     ) ) ), member( X, Z ) ] )
% 1.97/2.39  , clause( 13753, [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T
% 1.97/2.39     ) ) ), member( Y, T ) ] )
% 1.97/2.39  , clause( 13754, [ ~( member( X, Y ) ), ~( member( Z, T ) ), member( 
% 1.97/2.39    'ordered_pair'( X, Z ), 'cross_product'( Y, T ) ) ] )
% 1.97/2.39  , clause( 13755, [ ~( member( X, 'cross_product'( Y, Z ) ) ), =( 
% 1.97/2.39    'ordered_pair'( first( X ), second( X ) ), X ) ] )
% 1.97/2.39  , clause( 13756, [ subclass( 'element_relation', 'cross_product'( 
% 1.97/2.39    'universal_class', 'universal_class' ) ) ] )
% 1.97/2.39  , clause( 13757, [ ~( member( 'ordered_pair'( X, Y ), 'element_relation' )
% 1.97/2.39     ), member( X, Y ) ] )
% 1.97/2.39  , clause( 13758, [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( 
% 1.97/2.39    'universal_class', 'universal_class' ) ) ), ~( member( X, Y ) ), member( 
% 1.97/2.39    'ordered_pair'( X, Y ), 'element_relation' ) ] )
% 1.97/2.39  , clause( 13759, [ ~( member( X, intersection( Y, Z ) ) ), member( X, Y ) ]
% 1.97/2.39     )
% 1.97/2.39  , clause( 13760, [ ~( member( X, intersection( Y, Z ) ) ), member( X, Z ) ]
% 1.97/2.39     )
% 1.97/2.39  , clause( 13761, [ ~( member( X, Y ) ), ~( member( X, Z ) ), member( X, 
% 1.97/2.39    intersection( Y, Z ) ) ] )
% 1.97/2.39  , clause( 13762, [ ~( member( X, complement( Y ) ) ), ~( member( X, Y ) ) ]
% 1.97/2.39     )
% 1.97/2.39  , clause( 13763, [ ~( member( X, 'universal_class' ) ), member( X, 
% 1.97/2.39    complement( Y ) ), member( X, Y ) ] )
% 1.97/2.39  , clause( 13764, [ =( complement( intersection( complement( X ), complement( 
% 1.97/2.39    Y ) ) ), union( X, Y ) ) ] )
% 1.97/2.39  , clause( 13765, [ =( intersection( complement( intersection( X, Y ) ), 
% 1.97/2.39    complement( intersection( complement( X ), complement( Y ) ) ) ), 
% 1.97/2.39    'symmetric_difference'( X, Y ) ) ] )
% 1.97/2.39  , clause( 13766, [ =( intersection( X, 'cross_product'( Y, Z ) ), restrict( 
% 1.97/2.39    X, Y, Z ) ) ] )
% 1.97/2.39  , clause( 13767, [ =( intersection( 'cross_product'( X, Y ), Z ), restrict( 
% 1.97/2.39    Z, X, Y ) ) ] )
% 1.97/2.39  , clause( 13768, [ ~( =( restrict( X, singleton( Y ), 'universal_class' ), 
% 1.97/2.39    'null_class' ) ), ~( member( Y, 'domain_of'( X ) ) ) ] )
% 1.97/2.39  , clause( 13769, [ ~( member( X, 'universal_class' ) ), =( restrict( Y, 
% 1.97/2.39    singleton( X ), 'universal_class' ), 'null_class' ), member( X, 
% 1.97/2.39    'domain_of'( Y ) ) ] )
% 1.97/2.39  , clause( 13770, [ subclass( rotate( X ), 'cross_product'( 'cross_product'( 
% 1.97/2.39    'universal_class', 'universal_class' ), 'universal_class' ) ) ] )
% 1.97/2.39  , clause( 13771, [ ~( member( 'ordered_pair'( 'ordered_pair'( X, Y ), Z ), 
% 1.97/2.39    rotate( T ) ) ), member( 'ordered_pair'( 'ordered_pair'( Y, Z ), X ), T )
% 1.97/2.39     ] )
% 1.97/2.39  , clause( 13772, [ ~( member( 'ordered_pair'( 'ordered_pair'( X, Y ), Z ), 
% 1.97/2.39    T ) ), ~( member( 'ordered_pair'( 'ordered_pair'( Z, X ), Y ), 
% 1.97/2.39    'cross_product'( 'cross_product'( 'universal_class', 'universal_class' )
% 1.97/2.39    , 'universal_class' ) ) ), member( 'ordered_pair'( 'ordered_pair'( Z, X )
% 1.97/2.39    , Y ), rotate( T ) ) ] )
% 1.97/2.39  , clause( 13773, [ subclass( flip( X ), 'cross_product'( 'cross_product'( 
% 1.97/2.39    'universal_class', 'universal_class' ), 'universal_class' ) ) ] )
% 1.97/2.39  , clause( 13774, [ ~( member( 'ordered_pair'( 'ordered_pair'( X, Y ), Z ), 
% 1.97/2.39    flip( T ) ) ), member( 'ordered_pair'( 'ordered_pair'( Y, X ), Z ), T ) ]
% 1.97/2.39     )
% 1.97/2.39  , clause( 13775, [ ~( member( 'ordered_pair'( 'ordered_pair'( X, Y ), Z ), 
% 1.97/2.39    T ) ), ~( member( 'ordered_pair'( 'ordered_pair'( Y, X ), Z ), 
% 1.97/2.39    'cross_product'( 'cross_product'( 'universal_class', 'universal_class' )
% 1.97/2.39    , 'universal_class' ) ) ), member( 'ordered_pair'( 'ordered_pair'( Y, X )
% 1.97/2.39    , Z ), flip( T ) ) ] )
% 1.97/2.39  , clause( 13776, [ =( 'domain_of'( flip( 'cross_product'( X, 
% 1.97/2.39    'universal_class' ) ) ), inverse( X ) ) ] )
% 1.97/2.39  , clause( 13777, [ =( 'domain_of'( inverse( X ) ), 'range_of'( X ) ) ] )
% 1.97/2.39  , clause( 13778, [ =( first( 'not_subclass_element'( restrict( X, Y, 
% 1.97/2.39    singleton( Z ) ), 'null_class' ) ), domain( X, Y, Z ) ) ] )
% 1.97/2.39  , clause( 13779, [ =( second( 'not_subclass_element'( restrict( X, 
% 1.97/2.39    singleton( Y ), Z ), 'null_class' ) ), range( X, Y, Z ) ) ] )
% 1.97/2.39  , clause( 13780, [ =( 'range_of'( restrict( X, Y, 'universal_class' ) ), 
% 1.97/2.39    image( X, Y ) ) ] )
% 1.97/2.39  , clause( 13781, [ =( union( X, singleton( X ) ), successor( X ) ) ] )
% 1.97/2.39  , clause( 13782, [ subclass( 'successor_relation', 'cross_product'( 
% 1.97/2.39    'universal_class', 'universal_class' ) ) ] )
% 1.97/2.39  , clause( 13783, [ ~( member( 'ordered_pair'( X, Y ), 'successor_relation'
% 1.97/2.39     ) ), =( successor( X ), Y ) ] )
% 1.97/2.39  , clause( 13784, [ ~( =( successor( X ), Y ) ), ~( member( 'ordered_pair'( 
% 1.97/2.39    X, Y ), 'cross_product'( 'universal_class', 'universal_class' ) ) ), 
% 1.97/2.39    member( 'ordered_pair'( X, Y ), 'successor_relation' ) ] )
% 1.97/2.39  , clause( 13785, [ ~( inductive( X ) ), member( 'null_class', X ) ] )
% 1.97/2.39  , clause( 13786, [ ~( inductive( X ) ), subclass( image( 
% 1.97/2.39    'successor_relation', X ), X ) ] )
% 1.97/2.39  , clause( 13787, [ ~( member( 'null_class', X ) ), ~( subclass( image( 
% 1.97/2.39    'successor_relation', X ), X ) ), inductive( X ) ] )
% 1.97/2.39  , clause( 13788, [ inductive( omega ) ] )
% 1.97/2.39  , clause( 13789, [ ~( inductive( X ) ), subclass( omega, X ) ] )
% 1.97/2.39  , clause( 13790, [ member( omega, 'universal_class' ) ] )
% 1.97/2.39  , clause( 13791, [ =( 'domain_of'( restrict( 'element_relation', 
% 1.97/2.39    'universal_class', X ) ), 'sum_class'( X ) ) ] )
% 1.97/2.39  , clause( 13792, [ ~( member( X, 'universal_class' ) ), member( 'sum_class'( 
% 1.97/2.39    X ), 'universal_class' ) ] )
% 1.97/2.39  , clause( 13793, [ =( complement( image( 'element_relation', complement( X
% 1.97/2.39     ) ) ), 'power_class'( X ) ) ] )
% 1.97/2.39  , clause( 13794, [ ~( member( X, 'universal_class' ) ), member( 
% 1.97/2.39    'power_class'( X ), 'universal_class' ) ] )
% 1.97/2.39  , clause( 13795, [ subclass( compose( X, Y ), 'cross_product'( 
% 1.97/2.39    'universal_class', 'universal_class' ) ) ] )
% 1.97/2.39  , clause( 13796, [ ~( member( 'ordered_pair'( X, Y ), compose( Z, T ) ) ), 
% 1.97/2.39    member( Y, image( Z, image( T, singleton( X ) ) ) ) ] )
% 1.97/2.39  , clause( 13797, [ ~( member( X, image( Y, image( Z, singleton( T ) ) ) ) )
% 1.97/2.39    , ~( member( 'ordered_pair'( T, X ), 'cross_product'( 'universal_class', 
% 1.97/2.39    'universal_class' ) ) ), member( 'ordered_pair'( T, X ), compose( Y, Z )
% 1.97/2.39     ) ] )
% 1.97/2.39  , clause( 13798, [ ~( 'single_valued_class'( X ) ), subclass( compose( X, 
% 1.97/2.39    inverse( X ) ), 'identity_relation' ) ] )
% 1.97/2.39  , clause( 13799, [ ~( subclass( compose( X, inverse( X ) ), 
% 1.97/2.39    'identity_relation' ) ), 'single_valued_class'( X ) ] )
% 1.97/2.39  , clause( 13800, [ ~( function( X ) ), subclass( X, 'cross_product'( 
% 1.97/2.39    'universal_class', 'universal_class' ) ) ] )
% 1.97/2.39  , clause( 13801, [ ~( function( X ) ), subclass( compose( X, inverse( X ) )
% 1.97/2.39    , 'identity_relation' ) ] )
% 1.97/2.39  , clause( 13802, [ ~( subclass( X, 'cross_product'( 'universal_class', 
% 1.97/2.39    'universal_class' ) ) ), ~( subclass( compose( X, inverse( X ) ), 
% 1.97/2.39    'identity_relation' ) ), function( X ) ] )
% 1.97/2.39  , clause( 13803, [ ~( function( X ) ), ~( member( Y, 'universal_class' ) )
% 1.97/2.39    , member( image( X, Y ), 'universal_class' ) ] )
% 1.97/2.39  , clause( 13804, [ =( X, 'null_class' ), member( regular( X ), X ) ] )
% 1.97/2.39  , clause( 13805, [ =( X, 'null_class' ), =( intersection( X, regular( X ) )
% 1.97/2.39    , 'null_class' ) ] )
% 1.97/2.39  , clause( 13806, [ =( 'sum_class'( image( X, singleton( Y ) ) ), apply( X, 
% 1.97/2.39    Y ) ) ] )
% 1.97/2.39  , clause( 13807, [ function( choice ) ] )
% 1.97/2.39  , clause( 13808, [ ~( member( X, 'universal_class' ) ), =( X, 'null_class'
% 1.97/2.39     ), member( apply( choice, X ), X ) ] )
% 1.97/2.39  , clause( 13809, [ ~( 'one_to_one'( X ) ), function( X ) ] )
% 1.97/2.39  , clause( 13810, [ ~( 'one_to_one'( X ) ), function( inverse( X ) ) ] )
% 1.97/2.39  , clause( 13811, [ ~( function( inverse( X ) ) ), ~( function( X ) ), 
% 1.97/2.39    'one_to_one'( X ) ] )
% 1.97/2.39  , clause( 13812, [ =( intersection( 'cross_product'( 'universal_class', 
% 1.97/2.39    'universal_class' ), intersection( 'cross_product'( 'universal_class', 
% 1.97/2.39    'universal_class' ), complement( compose( complement( 'element_relation'
% 1.97/2.39     ), inverse( 'element_relation' ) ) ) ) ), 'subset_relation' ) ] )
% 1.97/2.39  , clause( 13813, [ =( intersection( inverse( 'subset_relation' ), 
% 1.97/2.39    'subset_relation' ), 'identity_relation' ) ] )
% 1.97/2.39  , clause( 13814, [ =( complement( 'domain_of'( intersection( X, 
% 1.97/2.39    'identity_relation' ) ) ), diagonalise( X ) ) ] )
% 1.97/2.39  , clause( 13815, [ =( intersection( 'domain_of'( X ), diagonalise( compose( 
% 1.97/2.39    inverse( 'element_relation' ), X ) ) ), cantor( X ) ) ] )
% 1.97/2.39  , clause( 13816, [ ~( operation( X ) ), function( X ) ] )
% 1.97/2.39  , clause( 13817, [ ~( operation( X ) ), =( 'cross_product'( 'domain_of'( 
% 1.97/2.39    'domain_of'( X ) ), 'domain_of'( 'domain_of'( X ) ) ), 'domain_of'( X ) )
% 1.97/2.39     ] )
% 1.97/2.39  , clause( 13818, [ ~( operation( X ) ), subclass( 'range_of'( X ), 
% 1.97/2.39    'domain_of'( 'domain_of'( X ) ) ) ] )
% 1.97/2.39  , clause( 13819, [ ~( function( X ) ), ~( =( 'cross_product'( 'domain_of'( 
% 1.97/2.39    'domain_of'( X ) ), 'domain_of'( 'domain_of'( X ) ) ), 'domain_of'( X ) )
% 1.97/2.39     ), ~( subclass( 'range_of'( X ), 'domain_of'( 'domain_of'( X ) ) ) ), 
% 1.97/2.39    operation( X ) ] )
% 1.97/2.39  , clause( 13820, [ ~( compatible( X, Y, Z ) ), function( X ) ] )
% 1.97/2.39  , clause( 13821, [ ~( compatible( X, Y, Z ) ), =( 'domain_of'( 'domain_of'( 
% 1.97/2.39    Y ) ), 'domain_of'( X ) ) ] )
% 1.97/2.39  , clause( 13822, [ ~( compatible( X, Y, Z ) ), subclass( 'range_of'( X ), 
% 1.97/2.39    'domain_of'( 'domain_of'( Z ) ) ) ] )
% 1.97/2.39  , clause( 13823, [ ~( function( X ) ), ~( =( 'domain_of'( 'domain_of'( Y )
% 1.97/2.39     ), 'domain_of'( X ) ) ), ~( subclass( 'range_of'( X ), 'domain_of'( 
% 1.97/2.39    'domain_of'( Z ) ) ) ), compatible( X, Y, Z ) ] )
% 1.97/2.39  , clause( 13824, [ ~( homomorphism( X, Y, Z ) ), operation( Y ) ] )
% 1.97/2.39  , clause( 13825, [ ~( homomorphism( X, Y, Z ) ), operation( Z ) ] )
% 1.97/2.39  , clause( 13826, [ ~( homomorphism( X, Y, Z ) ), compatible( X, Y, Z ) ] )
% 1.97/2.39  , clause( 13827, [ ~( homomorphism( X, Y, Z ) ), ~( member( 'ordered_pair'( 
% 1.97/2.39    T, U ), 'domain_of'( Y ) ) ), =( apply( Z, 'ordered_pair'( apply( X, T )
% 1.97/2.39    , apply( X, U ) ) ), apply( X, apply( Y, 'ordered_pair'( T, U ) ) ) ) ]
% 1.97/2.39     )
% 1.97/2.39  , clause( 13828, [ ~( operation( X ) ), ~( operation( Y ) ), ~( compatible( 
% 1.97/2.39    Z, X, Y ) ), member( 'ordered_pair'( 'not_homomorphism1'( Z, X, Y ), 
% 1.97/2.39    'not_homomorphism2'( Z, X, Y ) ), 'domain_of'( X ) ), homomorphism( Z, X
% 1.97/2.39    , Y ) ] )
% 1.97/2.39  , clause( 13829, [ ~( operation( X ) ), ~( operation( Y ) ), ~( compatible( 
% 1.97/2.39    Z, X, Y ) ), ~( =( apply( Y, 'ordered_pair'( apply( Z, 
% 1.97/2.39    'not_homomorphism1'( Z, X, Y ) ), apply( Z, 'not_homomorphism2'( Z, X, Y
% 1.97/2.39     ) ) ) ), apply( Z, apply( X, 'ordered_pair'( 'not_homomorphism1'( Z, X, 
% 1.97/2.39    Y ), 'not_homomorphism2'( Z, X, Y ) ) ) ) ) ), homomorphism( Z, X, Y ) ]
% 1.97/2.39     )
% 1.97/2.39  , clause( 13830, [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T
% 1.97/2.39     ) ) ), member( X, 'unordered_pair'( X, Y ) ) ] )
% 1.97/2.39  , clause( 13831, [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T
% 1.97/2.39     ) ) ), member( Y, 'unordered_pair'( X, Y ) ) ] )
% 1.97/2.39  , clause( 13832, [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T
% 1.97/2.39     ) ) ), member( X, 'universal_class' ) ] )
% 1.97/2.39  , clause( 13833, [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T
% 1.97/2.39     ) ) ), member( Y, 'universal_class' ) ] )
% 1.97/2.39  , clause( 13834, [ subclass( X, X ) ] )
% 1.97/2.39  , clause( 13835, [ ~( subclass( X, Y ) ), ~( subclass( Y, Z ) ), subclass( 
% 1.97/2.39    X, Z ) ] )
% 1.97/2.39  , clause( 13836, [ =( X, Y ), member( 'not_subclass_element'( X, Y ), X ), 
% 1.97/2.39    member( 'not_subclass_element'( Y, X ), Y ) ] )
% 1.97/2.39  , clause( 13837, [ ~( member( 'not_subclass_element'( X, Y ), Y ) ), =( X, 
% 1.97/2.39    Y ), member( 'not_subclass_element'( Y, X ), Y ) ] )
% 1.97/2.39  , clause( 13838, [ ~( member( 'not_subclass_element'( X, Y ), Y ) ), =( Y, 
% 1.97/2.39    X ), member( 'not_subclass_element'( Y, X ), Y ) ] )
% 1.97/2.39  , clause( 13839, [ ~( member( 'not_subclass_element'( X, Y ), Y ) ), ~( 
% 1.97/2.39    member( 'not_subclass_element'( Y, X ), X ) ), =( X, Y ) ] )
% 1.97/2.39  , clause( 13840, [ ~( member( X, intersection( complement( Y ), Y ) ) ) ]
% 1.97/2.39     )
% 1.97/2.39  , clause( 13841, [ ~( member( X, 'null_class' ) ) ] )
% 1.97/2.39  , clause( 13842, [ subclass( 'null_class', X ) ] )
% 1.97/2.39  , clause( 13843, [ ~( subclass( X, 'null_class' ) ), =( X, 'null_class' ) ]
% 1.97/2.39     )
% 1.97/2.39  , clause( 13844, [ =( X, 'null_class' ), member( 'not_subclass_element'( X
% 1.97/2.39    , 'null_class' ), X ) ] )
% 1.97/2.39  , clause( 13845, [ member( 'null_class', 'universal_class' ) ] )
% 1.97/2.39  , clause( 13846, [ =( 'unordered_pair'( X, Y ), 'unordered_pair'( Y, X ) )
% 1.97/2.39     ] )
% 1.97/2.39  , clause( 13847, [ subclass( singleton( X ), 'unordered_pair'( X, Y ) ) ]
% 1.97/2.39     )
% 1.97/2.39  , clause( 13848, [ subclass( singleton( X ), 'unordered_pair'( Y, X ) ) ]
% 1.97/2.39     )
% 1.97/2.39  , clause( 13849, [ member( X, 'universal_class' ), =( 'unordered_pair'( Y, 
% 1.97/2.39    X ), singleton( Y ) ) ] )
% 1.97/2.39  , clause( 13850, [ member( X, 'universal_class' ), =( 'unordered_pair'( X, 
% 1.97/2.39    Y ), singleton( Y ) ) ] )
% 1.97/2.39  , clause( 13851, [ =( 'unordered_pair'( X, Y ), 'null_class' ), member( X, 
% 1.97/2.39    'universal_class' ), member( Y, 'universal_class' ) ] )
% 1.97/2.39  , clause( 13852, [ ~( =( 'unordered_pair'( X, Y ), 'unordered_pair'( X, Z )
% 1.97/2.39     ) ), ~( member( 'ordered_pair'( Y, Z ), 'cross_product'( 
% 1.97/2.39    'universal_class', 'universal_class' ) ) ), =( Y, Z ) ] )
% 1.97/2.39  , clause( 13853, [ ~( =( 'unordered_pair'( X, Y ), 'unordered_pair'( Z, Y )
% 1.97/2.39     ) ), ~( member( 'ordered_pair'( X, Z ), 'cross_product'( 
% 1.97/2.39    'universal_class', 'universal_class' ) ) ), =( X, Z ) ] )
% 1.97/2.39  , clause( 13854, [ ~( member( X, 'universal_class' ) ), ~( =( 
% 1.97/2.39    'unordered_pair'( X, Y ), 'null_class' ) ) ] )
% 1.97/2.39  , clause( 13855, [ ~( member( X, 'universal_class' ) ), ~( =( 
% 1.97/2.39    'unordered_pair'( Y, X ), 'null_class' ) ) ] )
% 1.97/2.39  , clause( 13856, [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T
% 1.97/2.39     ) ) ), ~( =( 'unordered_pair'( X, Y ), 'null_class' ) ) ] )
% 1.97/2.39  , clause( 13857, [ ~( member( X, Y ) ), ~( member( Z, Y ) ), subclass( 
% 1.97/2.39    'unordered_pair'( X, Z ), Y ) ] )
% 1.97/2.39  , clause( 13858, [ member( singleton( X ), 'universal_class' ) ] )
% 1.97/2.39  , clause( 13859, [ member( singleton( X ), 'unordered_pair'( Y, singleton( 
% 1.97/2.39    X ) ) ) ] )
% 1.97/2.39  , clause( 13860, [ ~( member( X, 'universal_class' ) ), member( X, 
% 1.97/2.39    singleton( X ) ) ] )
% 1.97/2.39  , clause( 13861, [ ~( member( X, 'universal_class' ) ), ~( =( singleton( X
% 1.97/2.39     ), 'null_class' ) ) ] )
% 1.97/2.39  , clause( 13862, [ member( 'null_class', singleton( 'null_class' ) ) ] )
% 1.97/2.39  , clause( 13863, [ ~( member( X, singleton( Y ) ) ), =( X, Y ) ] )
% 1.97/2.39  , clause( 13864, [ member( X, 'universal_class' ), =( singleton( X ), 
% 1.97/2.39    'null_class' ) ] )
% 1.97/2.39  , clause( 13865, [ ~( =( singleton( X ), singleton( Y ) ) ), ~( member( X, 
% 1.97/2.39    'universal_class' ) ), =( X, Y ) ] )
% 1.97/2.39  , clause( 13866, [ ~( =( singleton( X ), singleton( Y ) ) ), ~( member( Y, 
% 1.97/2.39    'universal_class' ) ), =( X, Y ) ] )
% 1.97/2.39  , clause( 13867, [ ~( =( 'unordered_pair'( X, Y ), singleton( Z ) ) ), ~( 
% 1.97/2.39    member( Z, 'universal_class' ) ), =( Z, X ), =( Z, Y ) ] )
% 1.97/2.39  , clause( 13868, [ ~( member( X, 'universal_class' ) ), member( 'member_of'( 
% 1.97/2.39    singleton( X ) ), 'universal_class' ) ] )
% 1.97/2.39  , clause( 13869, [ ~( member( X, 'universal_class' ) ), =( singleton( 
% 1.97/2.39    'member_of'( singleton( X ) ) ), singleton( X ) ) ] )
% 1.97/2.39  , clause( 13870, [ member( 'member_of'( X ), 'universal_class' ), =( 
% 1.97/2.39    'member_of'( X ), X ) ] )
% 1.97/2.39  , clause( 13871, [ =( singleton( 'member_of'( X ) ), X ), =( 'member_of'( X
% 1.97/2.39     ), X ) ] )
% 1.97/2.39  , clause( 13872, [ ~( member( X, 'universal_class' ) ), =( 'member_of'( 
% 1.97/2.39    singleton( X ) ), X ) ] )
% 1.97/2.39  , clause( 13873, [ member( 'member_of1'( X ), 'universal_class' ), =( 
% 1.97/2.39    'member_of'( X ), X ) ] )
% 1.97/2.39  , clause( 13874, [ =( singleton( 'member_of1'( X ) ), X ), =( 'member_of'( 
% 1.97/2.39    X ), X ) ] )
% 1.97/2.39  , clause( 13875, [ ~( =( singleton( 'member_of'( X ) ), X ) ), member( X, 
% 1.97/2.39    'universal_class' ) ] )
% 1.97/2.39  , clause( 13876, [ ~( =( singleton( 'member_of'( X ) ), X ) ), ~( member( Y
% 1.97/2.39    , X ) ), =( 'member_of'( X ), Y ) ] )
% 1.97/2.39  , clause( 13877, [ ~( member( X, Y ) ), subclass( singleton( X ), Y ) ] )
% 1.97/2.39  , clause( 13878, [ ~( subclass( X, singleton( Y ) ) ), =( X, 'null_class' )
% 1.97/2.39    , =( singleton( Y ), X ) ] )
% 1.97/2.39  , clause( 13879, [ member( 'not_subclass_element'( intersection( complement( 
% 1.97/2.39    singleton( 'not_subclass_element'( X, 'null_class' ) ) ), X ), 
% 1.97/2.39    'null_class' ), intersection( complement( singleton( 
% 1.97/2.39    'not_subclass_element'( X, 'null_class' ) ) ), X ) ), =( singleton( 
% 1.97/2.39    'not_subclass_element'( X, 'null_class' ) ), X ), =( X, 'null_class' ) ]
% 1.97/2.39     )
% 1.97/2.39  , clause( 13880, [ member( 'not_subclass_element'( intersection( complement( 
% 1.97/2.39    singleton( 'not_subclass_element'( X, 'null_class' ) ) ), X ), 
% 1.97/2.39    'null_class' ), X ), =( singleton( 'not_subclass_element'( X, 
% 1.97/2.39    'null_class' ) ), X ), =( X, 'null_class' ) ] )
% 1.97/2.39  , clause( 13881, [ ~( =( 'not_subclass_element'( intersection( complement( 
% 1.97/2.39    singleton( 'not_subclass_element'( X, 'null_class' ) ) ), X ), 
% 1.97/2.39    'null_class' ), 'not_subclass_element'( X, 'null_class' ) ) ), =( 
% 1.97/2.39    singleton( 'not_subclass_element'( X, 'null_class' ) ), X ), =( X, 
% 1.97/2.39    'null_class' ) ] )
% 1.97/2.39  , clause( 13882, [ =( 'unordered_pair'( X, Y ), union( singleton( X ), 
% 1.97/2.39    singleton( Y ) ) ) ] )
% 1.97/2.39  , clause( 13883, [ member( 'ordered_pair'( X, Y ), 'universal_class' ) ] )
% 1.97/2.39  , clause( 13884, [ ~( member( singleton( x ), 'ordered_pair'( x, y ) ) ) ]
% 1.97/2.39     )
% 1.97/2.39  ] ).
% 1.97/2.39  
% 1.97/2.39  
% 1.97/2.39  
% 1.97/2.39  subsumption(
% 1.97/2.39  clause( 7, [ ~( member( X, 'universal_class' ) ), member( X, 
% 1.97/2.39    'unordered_pair'( X, Y ) ) ] )
% 1.97/2.39  , clause( 13747, [ ~( member( X, 'universal_class' ) ), member( X, 
% 1.97/2.39    'unordered_pair'( X, Y ) ) ] )
% 1.97/2.39  , substitution( 0, [ :=( X, X ), :=( Y, Y )] ), permutation( 0, [ ==>( 0, 0
% 1.97/2.39     ), ==>( 1, 1 )] ) ).
% 1.97/2.39  
% 1.97/2.39  
% 1.97/2.39  subsumption(
% 1.97/2.39  clause( 11, [ =( 'unordered_pair'( singleton( X ), 'unordered_pair'( X, 
% 1.97/2.39    singleton( Y ) ) ), 'ordered_pair'( X, Y ) ) ] )
% 1.97/2.39  , clause( 13751, [ =( 'unordered_pair'( singleton( X ), 'unordered_pair'( X
% 1.97/2.39    , singleton( Y ) ) ), 'ordered_pair'( X, Y ) ) ] )
% 1.97/2.39  , substitution( 0, [ :=( X, X ), :=( Y, Y )] ), permutation( 0, [ ==>( 0, 0
% 1.97/2.39     )] ) ).
% 1.97/2.39  
% 1.97/2.39  
% 1.97/2.39  subsumption(
% 1.97/2.39  clause( 117, [ member( singleton( X ), 'universal_class' ) ] )
% 1.97/2.39  , clause( 13858, [ member( singleton( X ), 'universal_class' ) ] )
% 1.97/2.39  , substitution( 0, [ :=( X, X )] ), permutation( 0, [ ==>( 0, 0 )] ) ).
% 1.97/2.39  
% 1.97/2.39  
% 1.97/2.39  subsumption(
% 1.97/2.39  clause( 142, [ ~( member( singleton( x ), 'ordered_pair'( x, y ) ) ) ] )
% 1.97/2.39  , clause( 13884, [ ~( member( singleton( x ), 'ordered_pair'( x, y ) ) ) ]
% 1.97/2.39     )
% 1.97/2.39  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 0 )] ) ).
% 1.97/2.39  
% 1.97/2.39  
% 1.97/2.39  paramod(
% 1.97/2.39  clause( 14099, [ member( singleton( X ), 'ordered_pair'( X, Y ) ), ~( 
% 1.97/2.39    member( singleton( X ), 'universal_class' ) ) ] )
% 1.97/2.39  , clause( 11, [ =( 'unordered_pair'( singleton( X ), 'unordered_pair'( X, 
% 1.97/2.39    singleton( Y ) ) ), 'ordered_pair'( X, Y ) ) ] )
% 1.97/2.39  , 0, clause( 7, [ ~( member( X, 'universal_class' ) ), member( X, 
% 1.97/2.39    'unordered_pair'( X, Y ) ) ] )
% 1.97/2.39  , 1, 3, substitution( 0, [ :=( X, X ), :=( Y, Y )] ), substitution( 1, [ 
% 1.97/2.39    :=( X, singleton( X ) ), :=( Y, 'unordered_pair'( X, singleton( Y ) ) )] )
% 1.97/2.39    ).
% 1.97/2.39  
% 1.97/2.39  
% 1.97/2.39  resolution(
% 1.97/2.39  clause( 14100, [ member( singleton( X ), 'ordered_pair'( X, Y ) ) ] )
% 1.97/2.39  , clause( 14099, [ member( singleton( X ), 'ordered_pair'( X, Y ) ), ~( 
% 1.97/2.39    member( singleton( X ), 'universal_class' ) ) ] )
% 1.97/2.39  , 1, clause( 117, [ member( singleton( X ), 'universal_class' ) ] )
% 1.97/2.39  , 0, substitution( 0, [ :=( X, X ), :=( Y, Y )] ), substitution( 1, [ :=( X
% 1.97/2.39    , X )] )).
% 1.97/2.39  
% 1.97/2.39  
% 1.97/2.39  subsumption(
% 1.97/2.39  clause( 564, [ member( singleton( X ), 'ordered_pair'( X, Y ) ) ] )
% 1.97/2.39  , clause( 14100, [ member( singleton( X ), 'ordered_pair'( X, Y ) ) ] )
% 1.97/2.39  , substitution( 0, [ :=( X, X ), :=( Y, Y )] ), permutation( 0, [ ==>( 0, 0
% 1.97/2.39     )] ) ).
% 1.97/2.39  
% 1.97/2.39  
% 1.97/2.39  resolution(
% 1.97/2.39  clause( 14101, [] )
% 1.97/2.39  , clause( 142, [ ~( member( singleton( x ), 'ordered_pair'( x, y ) ) ) ] )
% 1.97/2.39  , 0, clause( 564, [ member( singleton( X ), 'ordered_pair'( X, Y ) ) ] )
% 1.97/2.39  , 0, substitution( 0, [] ), substitution( 1, [ :=( X, x ), :=( Y, y )] )
% 1.97/2.39    ).
% 1.97/2.39  
% 1.97/2.39  
% 1.97/2.39  subsumption(
% 1.97/2.39  clause( 13737, [] )
% 1.97/2.39  , clause( 14101, [] )
% 1.97/2.39  , substitution( 0, [] ), permutation( 0, [] ) ).
% 1.97/2.39  
% 1.97/2.39  
% 1.97/2.39  end.
% 1.97/2.39  
% 1.97/2.39  % ABCDEFGHIJKLMNOPQRSTUVWXYZ
% 1.97/2.39  
% 1.97/2.39  Memory use:
% 1.97/2.39  
% 1.97/2.39  space for terms:        246456
% 1.97/2.39  space for clauses:      645554
% 1.97/2.39  
% 1.97/2.39  
% 1.97/2.39  clauses generated:      43114
% 1.97/2.39  clauses kept:           13738
% 1.97/2.39  clauses selected:       460
% 1.97/2.39  clauses deleted:        74
% 1.97/2.39  clauses inuse deleted:  47
% 1.97/2.39  
% 1.97/2.39  subsentry:          101545
% 1.97/2.39  literals s-matched: 78864
% 1.97/2.39  literals matched:   76269
% 1.97/2.39  full subsumption:   38451
% 1.97/2.39  
% 1.97/2.39  checksum:           -1102458299
% 1.97/2.39  
% 1.97/2.39  
% 1.97/2.39  Bliksem ended
%------------------------------------------------------------------------------