proposition: Lemma un_menteur_bool (a b c d : Z) dit: dit a =? c -> dit b =? d -> (d =? a) || (b =? c) -> (a =? c) || (a =? d) -> (b =? c) || (b =? d) -> a =? d.
proof: Proof. Proof using. verit. Qed.
imports: SMTCoq Bool PArray Int63 List ZArith