Consider the following premises. t <-> t_3. q_7. p <-> t_3. t -> ~q_7. Can we infer p from them?
 From t -> ~q_7, q_7 we can infer ~t. From t <-> t_3, ~t we can infer ~t_3. Finally, from p <-> t_3, ~t_3 we can infer ~p, which contradicts p. Therefore, the answer is no.