Consider the following premises. r -> q_9. r or u_2. p_9 <-> q_9. u_2 -> p_9. Can we infer p_9 from them?
 From p_9 <-> q_9 we can infer q_9 -> p_9. From r -> q_9, q_9 -> p_9 we can infer r -> p_9. Finally, from r -> p_9, u_2 -> p_9, r or u_2 we can infer p_9. Therefore, the answer is yes.