She identified one, maybe this is the relative maximum point. But as we talk about in other videos, in order to use the first derivative test, so to speak, and find this place where the first derivative is zero, in order to test whether it is a maximum or a minimum point is you have to sample values on either side of it to make sure that you have a change in sign of the derivative. But you have to make sure that when you test on either side that you're not going beyond another critical point because critical points are places where you can change direction. And so let's see what she does in step three right over here. Well, it is indeed in step three that she's testing, she's trying to test values on either side of the critical point that she, that the one critical point that she identified. But the problem here, the reason why this is a little shady is this is beyond another critical point that is less than zero, and this is beyond, this is greater than another critical point that is greater than zero. This is larger than the critical point one, and this is less than the critical point negative one.