Consider the following premises. ~t_2 or q. t_2 or p_6. p_6 <-> p. q -> p. Can we infer p from them?
 From p_6 <-> p we can infer p_6 -> p. From t_2 or p_6, ~t_2 or q we can infer p_6 or q. Finally, from p_6 -> p, q -> p, p_6 or q we can infer p. Therefore, the answer is yes.