Consider the following premises. forall y_4: U_3(y_4) or W_1(y_4). q_1 -> s_3. W_1(a_8) -> q_1. U_3(a_8) -> s_3. Can we infer U_3(a_8) -> s_3 from them? If possible, name the inference rules being used at each step.
That is one of the premises. Therefore, the answer is yes.