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_11. p_11 or ~u. q_1.
~u can be inferred via the disjunctive syllogism rule. ~p_11 and q_1 can be inferred via the conjunction rule. q_1 and ~p_11 can be inferred via the conjunction rule. u -> p_11 can be inferred via the rewriting rule.