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: U(z) or ~P(z). exists z: T(z) -> P(z). forall z: W_4(z) -> P(z). forall z: W_4(z) or T(z).
forall z: P(z) -> U(z) can be inferred via the universal rewriting rule. exists z: P(z) can be inferred via the existential disjunction elimination rule.