What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? exists x_9: W(x_9) <-> U_1(x_9). forall x_9: W(x_9) <-> Q_3(x_9).
forall x_9: W(x_9) -> Q_3(x_9). exists x_9: W(x_9) -> U_1(x_9). forall x_9: Q_3(x_9) -> W(x_9). exists x_9: U_1(x_9) -> W(x_9).