Consider the following premises. forall x_6: R_6(x_6) or S_6(x_6). q -> r. S_6(b_1) -> r. ~R_6(b_1) or q. Can we infer r from them? If possible, name the inference rules being used at each step.
 From forall x_6: R_6(x_6) or S_6(x_6) we can infer R_6(b_1) or S_6(b_1) via universal instantiation. From R_6(b_1) or S_6(b_1), ~R_6(b_1) or q we can infer S_6(b_1) or q via resolution. Finally, from S_6(b_1) -> r, q -> r, S_6(b_1) or q we can infer r via disjunction elimination. Therefore, the answer is yes.