%------------------------------------------------------------------------------
% File     : LAT230-10 : TPTP v9.0.0. Released v7.3.0.
% Domain   : Puzzles
% Problem  : Equation H18 is Huntington by implication
% Version  : Especial.
% English  :

% Refs     : [CS18]  Claessen & Smallbone (2018), Efficient Encodings of Fi
%          : [Sma18] Smallbone (2018), Email to Geoff Sutcliffe
% Source   : [Sma18]
% Names    :

% Status   : Unsatisfiable
% Rating   : 0.64 v9.0.0, 0.59 v8.2.0, 0.62 v8.1.0, 0.75 v7.5.0, 0.67 v7.4.0, 0.65 v7.3.0
% Syntax   : Number of clauses     :   15 (  15 unt;   0 nHn;   2 RR)
%            Number of literals    :   15 (  15 equ;   1 neg)
%            Maximal clause size   :    1 (   1 avg)
%            Maximal term depth    :    6 (   2 avg)
%            Number of predicates  :    1 (   0 usr;   0 prp; 2-2 aty)
%            Number of functors    :    8 (   8 usr;   4 con; 0-4 aty)
%            Number of variables   :   26 (   3 sgn)
% SPC      : CNF_UNS_RFO_PEQ_UEQ

% Comments : Converted from LAT230-1 to UEQ using [CS18].
%------------------------------------------------------------------------------
cnf(ifeq_axiom,axiom,
    ifeq(A,A,B,C) = B ).

cnf(idempotence_of_meet,axiom,
    meet(X,X) = X ).

cnf(idempotence_of_join,axiom,
    join(X,X) = X ).

cnf(absorption1,axiom,
    meet(X,join(X,Y)) = X ).

cnf(absorption2,axiom,
    join(X,meet(X,Y)) = X ).

cnf(commutativity_of_meet,axiom,
    meet(X,Y) = meet(Y,X) ).

cnf(commutativity_of_join,axiom,
    join(X,Y) = join(Y,X) ).

cnf(associativity_of_meet,axiom,
    meet(meet(X,Y),Z) = meet(X,meet(Y,Z)) ).

cnf(associativity_of_join,axiom,
    join(join(X,Y),Z) = join(X,join(Y,Z)) ).

cnf(complement_join,axiom,
    join(X,complement(X)) = one ).

cnf(complement_meet,axiom,
    meet(X,complement(X)) = zero ).

cnf(meet_join_complement,axiom,
    ifeq(join(X,Y),one,ifeq(meet(X,Y),zero,complement(X),Y),Y) = Y ).

cnf(equation_H18,axiom,
    join(meet(X,Y),meet(X,Z)) = meet(X,join(meet(X,Y),join(meet(X,Z),meet(Y,join(X,Z))))) ).

cnf(prove_distributivity_hypothesis,hypothesis,
    meet(b,a) = a ).

cnf(prove_distributivity,negated_conjecture,
    join(complement(b),complement(a)) != complement(a) ).

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