Consider the following premises. p_6 -> t. w_3 <-> p_6. t <-> q_14. ~q_14. Can we infer ~w_3 from them? If possible, name the inference rules being used at each step.
 From t <-> q_14, ~q_14 we can infer ~t via biconditional elimination. From p_6 -> t, ~t we can infer ~p_6 via modus tollens. From w_3 <-> p_6 we can infer w_3 -> p_6 via biconditional elimination. Finally, from w_3 -> p_6, ~p_6 we can infer ~w_3 via modus tollens. Therefore, the answer is yes.