TPTP Problem File: SEV108^5.p

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%------------------------------------------------------------------------------
% File     : SEV108^5 : TPTP v7.1.0. Released v4.0.0.
% Domain   : Set Theory (Relations)
% Problem  : TPS problem from RELN-THMS
% Version  : Especial.
% English  :

% Refs     : [Bro09] Brown (2009), Email to Geoff Sutcliffe
% Source   : [Bro09]
% Names    : tps_1163 [Bro09]

% Status   : Theorem
% Rating   : 0.25 v7.0.0, 0.29 v6.4.0, 0.33 v6.3.0, 0.40 v6.2.0, 0.57 v6.1.0, 0.43 v5.5.0, 0.50 v5.4.0, 0.80 v4.1.0, 1.00 v4.0.0
% Syntax   : Number of formulae    :    1 (   0 unit;   0 type;   0 defn)
%            Number of atoms       :   78 (  18 equality;  60 variable)
%            Maximal formula depth :   26 (  26 average)
%            Number of connectives :   62 (  21   ~;   1   |;  22   &;  16   @)
%                                         (   0 <=>;   2  =>;   0  <=;   0 <~>)
%                                         (   0  ~|;   0  ~&)
%            Number of type conns  :    2 (   2   >;   0   *;   0   +;   0  <<)
%            Number of symbols     :    2 (   0   :;   0   =)
%            Number of variables   :   12 (   0 sgn;   9   !;   3   ?;   0   ^)
%                                         (  12   :;   0  !>;   0  ?*)
%                                         (   0  @-;   0  @+)
% SPC      : TH0_THM_EQU_NAR

% Comments : This problem is from the TPS library. Copyright (c) 2009 The TPS
%            project in the Department of Mathematical Sciences at Carnegie
%            Mellon University. Distributed under the Creative Commons copyleft
%            license: http://creativecommons.org/licenses/by-sa/3.0/
%          : 
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thf(cSIX_THEOREM_pme,conjecture,(
    ! [R: $i > $i > $o,A: $i,B: $i,C: $i,D: $i,E: $i,F: $i] :
      ( ( ! [Xx: $i,Xy: $i] :
            ( ( R @ Xx @ Xy )
           => ( R @ Xy @ Xx ) )
        & ( A != B )
        & ( A != C )
        & ( A != D )
        & ( A != E )
        & ( A != F )
        & ( B != C )
        & ( B != D )
        & ( B != E )
        & ( B != F )
        & ( C != D )
        & ( C != E )
        & ( C != F )
        & ( D != E )
        & ( D != F )
        & ( E != F ) )
     => ? [Xa: $i,Xb: $i,Xc: $i] :
          ( ( Xa != Xb )
          & ( Xa != Xc )
          & ( Xb != Xc )
          & ( ( ( R @ Xa @ Xb )
              & ( R @ Xa @ Xc )
              & ( R @ Xb @ Xc ) )
            | ( ~ ( R @ Xa @ Xb )
              & ~ ( R @ Xa @ Xc )
              & ~ ( R @ Xb @ Xc ) ) ) ) ) )).

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