What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? Name the inference rule being used: forall z: P(z) -> R_1(z). forall z: Q(z) or ~R_1(z). forall z: Q(z) -> P(z).
forall z: Q(z) -> R_1(z) can be inferred via the universal transitivity rule. forall z: R_1(z) -> Q(z) can be inferred via the universal rewriting rule.