Consider the following premises. ~p_11. p_11 or ~q_11. Can we infer q_11 from them? If possible, name the inference rules being used at each step.
 From p_11 or ~q_11 we can infer q_11 -> p_11 via rewriting. Finally, from q_11 -> p_11, ~p_11 we can infer ~q_11 via modus tollens, which contradicts q_11. Therefore, the answer is no.