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_6 or w_2. q. ~p_6. q -> u.
u can be inferred via the modus ponens rule. w_2 can be inferred via the disjunctive syllogism rule. q and ~p_6 can be inferred via the conjunction rule. ~p_6 and q can be inferred via the conjunction rule.