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: P_9(a_7) -> S(a_7). forall x_9: P_9(x_9) or ~S(x_9).
forall x_9: S(x_9) -> P_9(x_9) can be inferred via the universal rewriting rule.