What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall y_3: Q(y_3) <-> S_2(y_3). forall y_3: ~Q(y_3). forall y_3: Q(y_3) -> S_2(y_3).
forall y_3: Q(y_3) -> S_2(y_3). forall y_3: S_2(y_3) -> Q(y_3). forall y_3: ~S_2(y_3).