Consider the following premises. S_8(a_8) <-> q_2. P(a_8) -> q_2. forall x_8: P(x_8) or S_8(x_8). Can we infer q_2 from them?
 From forall x_8: P(x_8) or S_8(x_8) we can infer P(a_8) or S_8(a_8). From S_8(a_8) <-> q_2 we can infer S_8(a_8) -> q_2. Finally, from P(a_8) -> q_2, S_8(a_8) -> q_2, P(a_8) or S_8(a_8) we can infer q_2. Therefore, the answer is yes.