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_10 -> r. ~r. u. s_1 -> q_10.
~q_10 can be inferred via the modus tollens rule. s_1 -> r can be inferred via the transitivity rule. ~r and u can be inferred via the conjunction rule. u and ~r can be inferred via the conjunction rule.