Consider the following premises. forall x_10: Q_10(x_10) -> P_10(x_10). forall x_10: P_10(x_10) -> Q_10(x_10). u_3 -> P_10(a_5). u_3 or Q_10(a_5). Can we infer u_3 -> P_10(a_5) from them?
That is one of the premises. Therefore, the answer is yes.