Then your probability won't make any sense. But hopefully if you take this sum, it comes to some number, and we'll say, oh, there's only a 10% chance that you have more than 4 inches tomorrow. And all of this should kind of immediately lead to one light bulb in your head, is that the probability of all of the events that might occur can't be more than 100%, right? All of the events combined can't, you know, there's a probability of 1 that one of these events will occur. So essentially, the whole area under this curve has to be equal to 1. So if we took the integral of f of x from 0 to infinity, this thing, at least as I've drawn it, dx should be equal to 1, for those of you who have studied calculus. For those of you who haven't, an integral is just the area under a curve, and you can watch the calculus videos if you want to learn a little bit more about how to do them.