Consider the following premises. exists x_12: P_12(x_12) or ~Q_12(x_12). forall x_12: P_8(x_12) -> P_12(x_12). forall x_12: P_8(x_12) or Q_12(x_12). Can we infer forall x_12: P_8(x_12) -> P_12(x_12) from them?
That is one of the premises. Therefore, the answer is yes.