There's the milk. The container of milk on the table there has to do with the idea that all ideas in that kind of space are external ideas. What I meant when I said, "There's the milk," is that all things you have in any given situation are external concepts. They're not your concepts. You don't know how you feel about them. The world has these things and you're in the world so you take these things that the world has at that moment. You go to the supermarket and buy everthing that everybody else buys. Not all the things. But you don't think about whether that stuff should be in the supermarket in the first place. That never occured to you.