What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? exists z: T_2(z) -> P_1(z). forall z: P(z) -> T_2(z). forall z: P_1(z) <-> S(z).
exists z: P(z) -> P_1(z). forall z: P_1(z) -> S(z). forall z: S(z) -> P_1(z).