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) <-> W(z). forall z: T_2(z) <-> W(z). forall z: ~T(z). forall z: P(z) -> T_2(z). exists z: T_2(z) -> P(z).
exists z: T_2(z) <-> P(z). exists z: P(z) <-> T_2(z). forall z: T(z) -> W(z). forall z: T_2(z) -> W(z). forall z: W(z) -> T(z). forall z: W(z) -> T_2(z). forall z: ~W(z).