Consider the following premises. ~p_7. p_16 <-> q. ~p_16. p_7 <-> q_7. Can we infer ~q_7 and ~q from them? If possible, name the inference rules being used at each step.
 From p_16 <-> q, ~p_16 we can infer ~q via biconditional elimination. From p_7 <-> q_7, ~p_7 we can infer ~q_7 via biconditional elimination. Finally, from ~q_7, ~q we can infer ~q_7 and ~q via conjunction. Therefore, the answer is yes.