What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall x: S_3(x) <-> Q(x). forall x: W_4(x) -> S_3(x). exists x: U(x) or ~Q(x).
exists x: Q(x) -> U(x). forall x: S_3(x) -> Q(x). forall x: Q(x) -> S_3(x).