proposition: Fact S_ill_wc_weak Γ Δ B : Δ ⊢ B -> ‼Γ++Δ ⊢ B.
proof: Proof. intro; induction Γ; simpl; auto; apply in_ill4_weak; auto. Qed.
imports: List Permutation Arith Lia Undecidability.Shared.Libs.DLW(utils pos vec) Undecidability.ILL(ILL)