No one ever got fired for using the dominant prevalent model of the day, full stop. So if the dominant bodle is working, keep doing it, is my view. It's just when it doesn't work, ok wat, s just about to ask, how do we know if something isn't working any more? If you don't write that down, five from now, when sales are up 35 %, you're going to say, ye, exactly, this lige isis exactly what we what we said, sales increased 35%. That leads toe a bunch of human dynamic problems,. kindof that you have to take into account.