What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall x_14: P_14(x_14) -> R_13(x_14). forall x_14: P_14(x_14). t_4 -> ~R_13(a_9). forall x_14: Q_14(x_14) -> R_13(x_14).
forall x_14: R_13(x_14).