Consider the following premises. q_6 -> s. ~s. p_6 -> q_6. p_6 or q. Can we infer q from them? If possible, name the inference rules being used at each step.
 From p_6 -> q_6, q_6 -> s we can infer p_6 -> s via transitivity. From p_6 -> s, ~s we can infer ~p_6 via modus tollens. Finally, from p_6 or q, ~p_6 we can infer q via disjunctive syllogism. Therefore, the answer is yes.