> what if we had a restaurant named China Wok in Springfield, USA? Hardly unique. Add the state, you say? Probably still not unique. Ok sure, but then you hav

> what if we had a restaurant named China Wok in Springfield, USA? Hardly unique. Add the state, you say? Probably still not unique. Ok sure, but then you have 2 restaurants which are indistinguishable from one another in your database. It doesn't matter that the thing has a unique id next to it. You can't know which is which. That's not useful.