What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall y_4: P_2(y_4) <-> S(y_4). ~P_2(h). forall y_4: S(y_4) -> P_2(y_4).
forall y_4: P_2(y_4) -> S(y_4). forall y_4: S(y_4) -> P_2(y_4).