So what can I do? Well, I defined this second point here as just the first point, plus some h. And we have something in our toolkit called a limit. This h is just a general number. This h is just, it could be 10, it could be 2, it could be 0.02, it could be 1 times 10 to the negative 100. It could be an arbitrarily small number. So what happens, what would happen, at least just theoretically, if I were to take the limit as h approaches 0? So if first, maybe h is this fairly large number over here.