Consider the following premises. r_2 -> S_8(a). r_2. forall x_8: R_8(x_8) -> S_8(x_8). Can we infer S_8(a) from them? If possible, name the inference rules being used at each step.
 From forall x_8: R_8(x_8) -> S_8(x_8) we can infer R_8(a) -> S_8(a) via universal instantiation. From r_2 we can infer r_2 or R_8(a) via addition. Finally, from r_2 -> S_8(a), R_8(a) -> S_8(a), r_2 or R_8(a) we can infer S_8(a) via disjunction elimination. Therefore, the answer is yes.