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: W(z) -> Q(z). forall z: T_2(z) -> U(z). exists z: W(z) or ~U(z).
exists z: U(z) -> W(z) can be inferred via the existential rewriting rule.