Consider the following premises. forall z_1: T(z_1) or ~S(z_1). forall z_1: U(z_1) <-> S(z_1). Can we infer forall z_1: U(z_1) -> T(z_1) from them?
 From forall z_1: T(z_1) or ~S(z_1) we can infer forall z_1: S(z_1) -> T(z_1). From forall z_1: U(z_1) <-> S(z_1) we can infer forall z_1: U(z_1) -> S(z_1). Finally, from forall z_1: U(z_1) -> S(z_1), forall z_1: S(z_1) -> T(z_1) we can infer forall z_1: U(z_1) -> T(z_1). Therefore, the answer is yes.