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 -> q. u_4. p_12 -> q_12. ~q.
~q_12 can be inferred via the modus tollens rule. p_12 -> q can be inferred via the transitivity rule. u_4 and ~q can be inferred via the conjunction rule. ~q and u_4 can be inferred via the conjunction rule.