What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall z: P(z) -> Q(z). exists z: ~T_4(z). forall z: Q(z) -> P_2(z). forall z: P_2(z) -> T_4(z).
exists z: ~P_2(z). forall z: P(z) -> P_2(z). forall z: Q(z) -> T_4(z).