Consider the following premises. t -> r_11. p_11 or t. p_11 -> r_11. q <-> r_11. Can we infer q from them?
 From p_11 -> r_11, t -> r_11, p_11 or t we can infer r_11. From q <-> r_11 we can infer r_11 -> q. Finally, from r_11 -> q, r_11 we can infer q. Therefore, the answer is yes.