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: r_4 and s. forall x_23: R_23(x_23) -> S_23(x_23). q_6 -> S_23(a_23). R_23(a_23) or q_6.
r_4 can be inferred via the simplification rule. s can be inferred via the simplification rule.