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% File     : LCL232-1 : TPTP v8.2.0. Bugfixed v2.3.0.
% Domain   : Logic Calculi (Propositional)
% Problem  : Principia Mathematica 3.1
% Version  : [WR27] axioms.
% English  :

% Refs     : [WR27]  Whitehead & Russell (1927), Principia Mathematica
%          : [NSS63] Newell et al. (1963), Empirical Explorations with the
%          : [ORo89] O'Rourke (1989), LT Revisited: Explanation-Based Learn
%          : [SE94]  Segre & Elkan (1994), A High-Performance Explanation-B
% Source   : [SE94]
% Names    : Problem 3.1 [WR27]

% Status   : Satisfiable
% Rating   : 0.67 v2.2.1, 0.75 v2.2.0, 0.67 v2.1.0, 1.00 v2.0.0
% Syntax   :

% Comments :
% Bugfixes : v2.3.0 - Removed. Should be an axiom.
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