Consider the following premises. p <-> p_9. p_9 or ~p. Can we infer p_9 -> p from them? If possible, name the inference rules being used at each step.
 From p_9 or ~p we can infer p -> p_9 via rewriting. Finally, from p <-> p_9 we can infer p_9 -> p via biconditional elimination. Therefore, the answer is yes.