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: u_3. p_18 -> ~w. w. p_18 or ~q.
~p_18 can be inferred via the modus tollens rule. u_3 and w can be inferred via the conjunction rule. w and u_3 can be inferred via the conjunction rule. q -> p_18 can be inferred via the rewriting rule.