proposition: Lemma Forall_tails_id {A P} (ls : list A) (H : Forall_tails P ls) : P ls.
proof: Proof. destruct ls; simpl in *; try assumption. destruct H; assumption. Defined.
imports: Fiat.Common.Coq__8_4__8_5__Compat Coq.ZArith.ZArith Coq.Lists.List Coq.Lists.SetoidList Coq.Bool.Bool Fiat.Common Fiat.Common.List.Operations Fiat.Common.Equality Fiat.Common.List.FlattenList Fiat.Common.LogicFacts