Consider the following premises. ~s. p_6 or q. p_6 -> q_6. q_6 -> s. Can we infer ~q from them?
 From p_6 -> q_6, q_6 -> s we can infer p_6 -> s. From p_6 -> s, ~s we can infer ~p_6. Finally, from p_6 or q, ~p_6 we can infer q, which contradicts ~q. Therefore, the answer is no.