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_22 or q_22. u -> r_6. t or u. t -> r_6. ~p_22. t_3 -> ~q_22.
q_22 can be inferred via the disjunctive syllogism rule. r_6 can be inferred via the disjunction elimination rule.