Consider the following premises. p_1 -> q_9. p_1 or ~q_9. q_9 -> ~r_2. r_2. Can we infer p_1 from them?
 From p_1 or ~q_9 we can infer q_9 -> p_1. From q_9 -> ~r_2, r_2 we can infer ~q_9. From p_1 -> q_9, q_9 -> p_1 we can infer p_1 <-> q_9. Finally, from p_1 <-> q_9, ~q_9 we can infer ~p_1, which contradicts p_1. Therefore, the answer is no.