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