Consider the following premises. forall x_1: R(x_1) <-> T(x_1). forall x_1: R(x_1) <-> U(x_1). Can we infer forall x_1: U(x_1) -> T(x_1) from them?
 From forall x_1: R(x_1) <-> T(x_1) we can infer forall x_1: R(x_1) -> T(x_1). From forall x_1: R(x_1) <-> U(x_1) we can infer forall x_1: U(x_1) -> R(x_1). Finally, from forall x_1: U(x_1) -> R(x_1), forall x_1: R(x_1) -> T(x_1) we can infer forall x_1: U(x_1) -> T(x_1). Therefore, the answer is yes.