What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall x: S_1(x) <-> W(x). forall x: ~S(x). forall x: S_1(x) -> S(x).
forall x: ~S_1(x). forall x: S_1(x) -> W(x). forall x: W(x) -> S_1(x).