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: s_3 -> r. ~r. q_3.
~s_3 can be inferred via the modus tollens rule. ~r and q_3 can be inferred via the conjunction rule. q_3 and ~r can be inferred via the conjunction rule.