Consider the following premises. q_12. w. ~p_2 -> t. p_2 -> ~q_12. Can we infer w and t from them? If possible, name the inference rules being used at each step.
 From p_2 -> ~q_12, q_12 we can infer ~p_2 via modus tollens. From ~p_2 -> t, ~p_2 we can infer t via modus ponens. Finally, from w, t we can infer w and t via conjunction. Therefore, the answer is yes.