Consider the following premises. R_8(a_8) -> ~w. w. forall x_8: R_8(x_8) or S_8(x_8). Can we infer S_8(a_8) from them?
 From forall x_8: R_8(x_8) or S_8(x_8) we can infer R_8(a_8) or S_8(a_8). From R_8(a_8) -> ~w, w we can infer ~R_8(a_8). Finally, from R_8(a_8) or S_8(a_8), ~R_8(a_8) we can infer S_8(a_8). Therefore, the answer is yes.