Consider the following premises. q -> u_2. forall x_12: P_12(x_12). P_12(f_3) -> u_2. Can we infer u_2 from them?
 From forall x_12: P_12(x_12) we can infer P_12(f_3). From P_12(f_3) we can infer P_12(f_3) or q. Finally, from P_12(f_3) -> u_2, q -> u_2, P_12(f_3) or q we can infer u_2. Therefore, the answer is yes.