What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall x_9: W(x_9) or T(x_9). exists x_9: W(x_9) -> Q_1(x_9). forall x_9: P_9(x_9) <-> T(x_9). forall x_9: Q_1(x_9) -> P_9(x_9).
exists x_9: W(x_9) -> P_9(x_9). forall x_9: P_9(x_9) -> T(x_9). forall x_9: T(x_9) -> P_9(x_9).