Consider the following premises. forall x: U_3(x) -> W_3(x). forall x: W_3(x) -> T_3(x). exists x: ~T_3(x). forall x: T_3(x) <-> U_3(x). Can we infer forall x: T_3(x) <-> U_3(x) from them?
That is one of the premises. Therefore, the answer is yes.