What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? exists z: ~W_2(z). forall z: T(z) <-> W(z). forall z: W(z) <-> W_2(z).
forall z: T(z) -> W(z). forall z: W(z) -> W_2(z). forall z: W(z) -> T(z). forall z: W_2(z) -> W(z). exists z: ~W(z).