proposition: Remark closedT : forall v : nat, ~ In_freeVarSys LNN v T.
proof: Proof. intros v [x [? ?]]; now destruct (closedT1 v x). Qed.
imports: Coq(Arith List) hydras.Ackermann(ListExt folProp subProp extEqualNat Languages LNN NewNotations)