What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall z: W(z) <-> T_4(z). forall z: ~T_4(z). forall z: T_4(z) <-> W(z).
forall z: W(z) -> T_4(z). forall z: T_4(z) -> W(z). forall z: T_4(z) -> W(z). forall z: W(z) -> T_4(z). forall z: ~W(z). forall z: ~W(z).