Consider the following premises. forall x_13: Q_13(x_13) -> U(x_13). forall x_13: P_13(x_13) or Q_13(x_13). U(f) -> s. forall x_13: P_13(x_13) -> U(x_13). Can we infer ~u_3 from them?
We cannot infer that from the premises. Therefore the answer is no.