What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall x_15: Q_7(x_15) -> W(x_15). forall x_15: ~W(x_15). forall x_15: S_1(x_15) -> Q_7(x_15). exists x_15: U(x_15) <-> S_1(x_15). forall x_15: U(x_15) -> S_1(x_15).
forall x_15: ~Q_7(x_15). forall x_15: S_1(x_15) -> W(x_15). forall x_15: U(x_15) -> Q_7(x_15). exists x_15: U(x_15) -> S_1(x_15). exists x_15: S_1(x_15) -> U(x_15).