Now that's a concept that's always fascinated me: the real world. Only a very specific subset of people use the term, have you noticed? To me, it seems self-evident that everyone lives in the real world - we all breathe real oxygen, eat real food, the earth under our feet feels equally solid to all of us. But clearly these people have a far more tightly circumscribed definition of reality, one that I find deeply mysterious, and an almost pathologically intense need to bring others into line with that definition.