What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall y: W(y) <-> Q_4(y). forall y: U_4(y) -> W(y). forall y: ~Q_4(y).
forall y: W(y) -> Q_4(y). forall y: Q_4(y) -> W(y). forall y: ~W(y).