Consider the following premises. forall x_9: ~P_9(x_9). forall x_9: T_4(x_9) or Q(x_9). forall x_9: T_4(x_9) -> P_9(x_9). exists x_9: P_9(x_9) -> T_4(x_9). Can we infer exists x_9: Q(x_9) from them?
 From exists x_9: P_9(x_9) -> T_4(x_9), forall x_9: T_4(x_9) -> P_9(x_9) we can infer exists x_9: P_9(x_9) <-> T_4(x_9). From exists x_9: P_9(x_9) <-> T_4(x_9), forall x_9: ~P_9(x_9) we can infer exists x_9: ~T_4(x_9). Finally, from forall x_9: T_4(x_9) or Q(x_9), exists x_9: ~T_4(x_9) we can infer exists x_9: Q(x_9). Therefore, the answer is yes.