What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall x_9: Q_9(x_9) -> R_9(x_9). forall x_9: ~P_5(x_9). forall x_9: Q(x_9) -> Q_9(x_9). exists x_9: P_5(x_9) <-> R_9(x_9).
forall x_9: Q(x_9) -> R_9(x_9). exists x_9: P_5(x_9) -> R_9(x_9). exists x_9: R_9(x_9) -> P_5(x_9). exists x_9: ~R_9(x_9).