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