and he hires a man with an abacus, and when the abacus keeping track sees that he's given away more gold than he is in storage, he says, stop. you see? or my mother, who used to look at my checkbook, when she saw that, in fact, i had written more checks than i had in the account, she would grab it. stop. you see? so what is it here that's less abstract that the computer says, stop? >> it is -- >> how is that less abstract than king tut, if we had the same thing with a grain elevator, if we had the same thing with a reservoir of water, if we had the same thing with my checkbook? you see the point. >> i do see the point, justice breyer, and it seems to me that it goes to the question of the methodology you're going to employ. >> methodology is just that you said, stop. >> well, we could -- >> so what we have different here is the computer stops rather than the abacus man stopping or my mother stopping or the guy that the grain elevator has that says stop. so just saying, what is that it? in other words, if you say, computer stop, you have an invention. useful add but if you say, mother sto