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: q_12. w -> ~q_12. p_2 -> r. ~r.
~p_2 can be inferred via the modus tollens rule. ~w can be inferred via the modus tollens rule. q_12 and ~r can be inferred via the conjunction rule. ~r and q_12 can be inferred via the conjunction rule.