What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? exists y: U_1(y). forall y: T(y). forall y: T(y) <-> U_3(y).
exists y: U_1(y) and T(y). exists y: T(y) and U_1(y). forall y: T(y) -> U_3(y). forall y: U_3(y) -> T(y).