What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall x: Q_1(x) -> R(x). forall x: ~Q(x). forall x: Q(x) -> Q_1(x). exists x: W(x) <-> Q_1(x). forall x: R(x) -> Q(x).
forall x: ~R(x). forall x: Q_1(x) -> Q(x). forall x: Q(x) -> R(x). forall x: R(x) -> Q_1(x). exists x: W(x) -> Q_1(x). exists x: Q_1(x) -> W(x).