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. u -> ~s. p_16 or u. ~p_16 or p_1. s.
~u can be inferred via the modus tollens rule. p and s can be inferred via the conjunction rule. s and p can be inferred via the conjunction rule. u or p_1 can be inferred via the resolution rule.