Consider the following premises. w_3. p_9 -> w_3. p_9 or ~w_3. Can we infer p_9 from them?
 From p_9 or ~w_3 we can infer w_3 -> p_9. From p_9 -> w_3, w_3 -> p_9 we can infer p_9 <-> w_3. From p_9 <-> w_3 we can infer w_3 -> p_9. Finally, from w_3 -> p_9, w_3 we can infer p_9. Therefore, the answer is yes.