 But if I could show you all the dots preceding that dot, and then I ask you where the next dot's going to be, you could say, well, let me take a ruler, and I can put it up here, and I can sort of plot it, and the next dot's going to be up here somewhere. If all you know is the present, and I ask you, where do you see things going? You say, I don't know. It could go anywhere. But if I can show you how people have acted in the past in certain situations, you can say, you know what? I can sort of think that people will sort of act that way in the future, and it's probably going to go in this direction.