TPTP Problem File: SEV394^5.p

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```%------------------------------------------------------------------------------
% File     : SEV394^5 : TPTP v7.5.0. Released v4.0.0.
% Domain   : Set Theory
% Problem  : TPS problem THM269
% Version  : Especial.
% English  : Example for CADE-15.

% Refs     : [Bro09] Brown (2009), Email to Geoff Sutcliffe
% Source   : [Bro09]
% Names    : tps_0317 [Bro09]
%          : THM108 [TPS]
%          : THM269 [TPS]

% Status   : Theorem
% Rating   : 0.09 v7.5.0, 0.00 v7.4.0, 0.11 v7.2.0, 0.00 v7.1.0, 0.12 v7.0.0, 0.14 v6.4.0, 0.17 v6.3.0, 0.20 v6.2.0, 0.14 v5.5.0, 0.17 v5.4.0, 0.20 v4.1.0, 0.00 v4.0.1, 0.33 v4.0.0
% Syntax   : Number of formulae    :    2 (   0 unit;   1 type;   0 defn)
%            Number of atoms       :   16 (   1 equality;  14 variable)
%            Maximal formula depth :   11 (   6 average)
%            Number of connectives :   15 (   2   ~;   0   |;   3   &;   7   @)
%                                         (   0 <=>;   3  =>;   0  <=;   0 <~>)
%                                         (   0  ~|;   0  ~&)
%            Number of type conns  :    3 (   3   >;   0   *;   0   +;   0  <<)
%            Number of symbols     :    4 (   1   :;   0   =)
%            Number of variables   :    7 (   1 sgn;   5   !;   0   ?;   2   ^)
%                                         (   7   :;   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
%          : Polymorphic definitions expanded.
%------------------------------------------------------------------------------
thf(a_type,type,(
a: \$tType )).

thf(cTHM269_pme,conjecture,(
! [Xw: a > \$o,Xy: a > \$o,Xz: a > \$o] :
( ( ! [Xx: a] :
( ( ( Xw @ Xx )
& ~ ( Xz @ Xx ) )
=> ( Xy @ Xx ) )
& ( ( ^ [Xx: a] :
( ( Xz @ Xx )
& ~ ( Xy @ Xx ) ) )
= ( ^ [Xx: a] : \$false ) ) )
=> ! [Xx: a] :
( ( Xw @ Xx )
=> ( Xy @ Xx ) ) ) )).

%------------------------------------------------------------------------------
```