Because it says anything can happen, although it could be very, very, very unprobable. So the thing I talked about at the beginning of the video is when you figure out a normal distribution, you can't just look at this point on the graph. Let me get the pen tool back. You have to figure out the area under the curve between two points. So if I wanted to say, let's say this was our distribution. I said, what is the probability that I get 0? I don't know what phenomena this is describing, but that 0 happened.