Consider the following premises. forall x_8: ~R_8(x_8). ~w or s. w or R_8(a_8). Can we infer s from them? If possible, name the inference rules being used at each step.
 From forall x_8: ~R_8(x_8) we can infer ~R_8(a_8) via universal instantiation. From w or R_8(a_8), ~w or s we can infer R_8(a_8) or s via resolution. Finally, from R_8(a_8) or s, ~R_8(a_8) we can infer s via disjunctive syllogism. Therefore, the answer is yes.