That might be an inflection point. And the reason why I say it might be is because the second derivative is definitely 0 here. You put 2 thirds here, you're going to get 0. What we have to do is see whether the second derivative is positive or negative on either sides of 2 thirds. And we already have a sense of that. We could try out a couple of numbers. We know that if we take x is greater than 2 thirds.