What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall y_4: T_4(y_4) <-> T_2(y_4). T_2(i) -> T_4(i).
forall y_4: T_4(y_4) -> T_2(y_4). forall y_4: T_2(y_4) -> T_4(y_4).