But what about x being less than 2 thirds? So when x is less than 2 thirds, let me write it, let me scroll down a little bit. When x is less than 2 thirds, what's going on? I'll rewrite it. f prime prime of x, second derivative, 12x times 3x minus 2. Well, if we go, you know, really far less, we're going to get a negative number here. And this might be negative.