What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall z: P_3(z) -> T(z). exists z: Q(z) or Q_4(z). forall z: Q(z) -> T(z). forall z: Q_4(z) -> P_3(z).
forall z: Q_4(z) -> T(z).