proposition: Lemma intensional_model : exists V (M : interp V), standard M /\ forall rho, rho ⊫ ZFeq'.
proof: Proof. exists Acz, Acz_interp. split; try apply Acz_standard. apply Acz_ZFeq'. Qed.
imports: Undecidability.FOL(Syntax.Facts Semantics.Tarski.FullFacts ZF) Undecidability.FOL.Sets(ZF binZF) Undecidability.FOL.Sets.Models(Aczel Aczel_CE Aczel_TD) Coq(Lia)