Consider the following premises. q_11 or ~s_3. s_3 <-> q_11. Can we infer s_3 -> q_11 from them?
 From s_3 <-> q_11 we can infer q_11 -> s_3. Finally, from q_11 or ~s_3 we can infer s_3 -> q_11. Therefore, the answer is yes.