cnf(a_not_equal_to_additive_identity_3,negated_conjecture, ( ~ equalish(a,additive_identity) )). cnf(b_not_equal_to_additive_identity_4,negated_conjecture, ( ~ equalish(b,additive_identity) )). cnf(add_not_equal_to_multiply_5,negated_conjecture, ( ~ equalish(add(multiplicative_inverse(a),multiplicative_inverse(b)),multiply(add(a,b),multiplicative_inverse(multiply(a,b)))) )).