Consider the following premises. forall x_9: P_6(x_9) -> W(x_9). exists x_9: Q_2(x_9). forall x_9: P_9(x_9) <-> W(x_9). forall x_9: P_6(x_9) or P_9(x_9). Can we infer exists x_9: Q_2(x_9) from them?
That is one of the premises. Therefore, the answer is yes.