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