Consider the following premises. ~R_3(a_3) or p_2. forall x_3: R_3(x_3) or S_3(x_3). Can we infer S_3(a_3) or p_2 from them? If possible, name the inference rules being used at each step.
 From forall x_3: R_3(x_3) or S_3(x_3) we can infer R_3(a_3) or S_3(a_3) via universal instantiation. Finally, from R_3(a_3) or S_3(a_3), ~R_3(a_3) or p_2 we can infer S_3(a_3) or p_2 via resolution. Therefore, the answer is yes.