Consider the following premises. forall x_5: T_4(x_5) -> S_1(x_5). forall x_5: U(x_5). forall x_5: S(x_5) or T_4(x_5). forall x_5: S(x_5) -> S_1(x_5). Can we infer forall x_5: U(x_5) from them?
That is one of the premises. Therefore, the answer is yes.