Consider the following premises. ~R_9(a_9) or w_3. forall x_9: R_9(x_9) or S_9(x_9). ~w_3. ~S_9(a_9) or p_1. Can we infer p_1 from them? If possible, name the inference rules being used at each step.
 From forall x_9: R_9(x_9) or S_9(x_9) we can infer R_9(a_9) or S_9(a_9) via universal instantiation. From R_9(a_9) or S_9(a_9), ~R_9(a_9) or w_3 we can infer S_9(a_9) or w_3 via resolution. From S_9(a_9) or w_3, ~S_9(a_9) or p_1 we can infer w_3 or p_1 via resolution. Finally, from w_3 or p_1, ~w_3 we can infer p_1 via disjunctive syllogism. Therefore, the answer is yes.