Consider the following premises. forall x_15: P_15(x_15) or ~Q_15(x_15). forall x_15: Q_15(x_15). Can we infer P_15(a_9) or t from them?
 From forall x_15: P_15(x_15) or ~Q_15(x_15) we can infer forall x_15: Q_15(x_15) -> P_15(x_15). From forall x_15: Q_15(x_15) -> P_15(x_15), forall x_15: Q_15(x_15) we can infer forall x_15: P_15(x_15). From forall x_15: P_15(x_15) we can infer P_15(a_9). Finally, from P_15(a_9) we can infer P_15(a_9) or t. Therefore, the answer is yes.