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: t. w_2 -> ~t. ~w_4 or r_2. ~p_12 or w_2. p_12.
~w_2 can be inferred via the modus tollens rule. t and p_12 can be inferred via the conjunction rule. p_12 and t can be inferred via the conjunction rule.