Consider the following premises. q. u_2 <-> u. p_17 <-> u_2. ~p_17. u <-> r. Can we infer q and ~r from them?
 From p_17 <-> u_2, ~p_17 we can infer ~u_2. From u_2 <-> u, ~u_2 we can infer ~u. From u <-> r, ~u we can infer ~r. Finally, from q, ~r we can infer q and ~r. Therefore, the answer is yes.