What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall z_1: P_1(z_1). exists z_1: S_3(z_1) <-> P(z_1). forall z_1: S_3(z_1) -> ~P_1(z_1).
forall z_1: ~S_3(z_1). exists z_1: S_3(z_1) -> P(z_1). exists z_1: P(z_1) -> S_3(z_1).