So these both meet our criteria for being a maximum point. So, so far, our criteria seems pretty good. Now let's make sure that somehow this point right over here, which we identified in the last video as a critical point, let's make, and I think we call this, let's see, this was x zero, this was x one, this was x two, this was x one, this was x two, so this is x three. Let's make sure that this doesn't somehow meet the criteria because we see visually that this is not a maximum point. So as we approach this, our slope is negative, and then as we cross it, our slope is still negative. We're still decreasing. So we haven't switched signs.