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(z). forall z: P(z) -> R_1(z). forall z: R_1(z) -> T_2(z).
forall z: P(z) -> T_2(z). exists z: T_2(z) -> R_1(z). exists z: R_1(z) -> P(z).