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_2. ~r -> q_1. q. r -> ~s_2.
~r can be inferred via the modus tollens rule. s_2 and q can be inferred via the conjunction rule. q and s_2 can be inferred via the conjunction rule.