What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? Name the inference rule being used: forall x_9: P_9(x_9) -> Q_9(x_9). forall x_9: Q_9(x_9) -> R_9(x_9). forall x_9: P_6(x_9) or ~R_9(x_9). forall x_9: P_6(x_9) -> R(x_9).
forall x_9: P_9(x_9) -> R_9(x_9) can be inferred via the universal transitivity rule. forall x_9: R_9(x_9) -> P_6(x_9) can be inferred via the universal rewriting rule.