What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall z: S_1(z) or ~T(z). exists z: S_1(z) -> T_1(z). forall z: T_1(z) -> U(z).
exists z: S_1(z) -> U(z). forall z: T(z) -> S_1(z).