Consider the following premises. q_4 -> u. forall x_2: ~T(x_2). T(f) or q_4. Can we infer u from them?
 From forall x_2: ~T(x_2) we can infer ~T(f). From T(f) or q_4, ~T(f) we can infer q_4. Finally, from q_4 -> u, q_4 we can infer u. Therefore, the answer is yes.