What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall z_1: S_2(z_1) <-> P(z_1). exists z_1: W(z_1) or ~P(z_1).
exists z_1: P(z_1) -> W(z_1). forall z_1: S_2(z_1) -> P(z_1). forall z_1: P(z_1) -> S_2(z_1).