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% File     : SYO014^1 : TPTP v9.0.0. Removed v4.0.0.
% Domain   : Syntactic
% Problem  : A theorem of MBb
% Version  : Especial.
% English  :

% Refs     : [Ben99] Benzmueller (1999), Equality and Extensionality in Hig
%          : [BB05]  Benzmueller & Brown (2005), A Structured Set of Higher
%          : [Ben09] Benzmueller (2009), Email to Geoff Sutcliffe
% Source   : [Ben09]
% Names    : Example 16 [BB05]

% Status   : Theorem
%          : Without Boolean extensionality : CounterSatisfiable
% Rating   : 0.33 v3.7.0
% Syntax   : Number of formulae    :    4 (   2 unit;   3 type;   0 defn)
%            Number of atoms       :   11 (   0 equality;   0 variable)
%            Maximal formula depth :    4 (   3 average)
%            Number of connectives :    6 (   0   ~;   0   |;   2   &;   3   @)
%                                         (   0 <=>;   1  =>;   0  <=;   0 <~>)
%                                         (   0  ~|;   0  ~&;   0  !!;   0  ??)
%            Number of type conns  :    1 (   1   >;   0   *;   0   +)
%            Number of symbols     :    4 (   3   :;   0  :=)
%            Number of variables   :    0 (   0 sgn;   0   !;   0   ?;   0   ^)
%                                         (   0   :;   0  :=;   0  !>;   0  ?*)

% Comments : THF0 syntax
% Bugfixes : v4.0.0 - Removed because it's SYN983^1.
%------------------------------------------------------------------------------