proposition: Lemma uneta_bool {b : bool} : (if b then true else false) = b.
proof: Proof. destruct b; reflexivity. Qed.
imports: Coq.Strings.String Coq.Strings.Ascii Coq.Arith.Arith Coq.ZArith.BinInt Coq.NArith.BinNat Coq.Bool.Bool Coq.Classes.Morphisms Fiat.Common.Coq__8_4__8_5__Compat