What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall z: S(z) -> R_3(z). forall z: P(z) -> S(z). exists z: P(z) or ~R_3(z).
forall z: P(z) -> R_3(z). exists z: R_3(z) -> P(z).