What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall y: W(y) <-> S_2(y). exists y: T(y) -> S_2(y). forall y: ~W(y). forall y: W(y) -> S_2(y).
forall y: W(y) -> S_2(y). forall y: S_2(y) -> W(y). forall y: ~S_2(y).