I can assure you that both my leg and desk lamps are perfectly real examples. There is a common kind of desk lamp that is even fairly mechanically similar to a human leg, with a knee , tension springs, and a ball-and-socket joint to permit free repositioning in multiple degrees of freedom, and about the same size. But the different design processes involved have resulted in very different designs, and a major reason for that is precisely the use of standardized parts in the desk lamp, but not in my leg, which results precisely from the kind of specialization we have been talking about. I don't see how much less vague I could have been. Are you being sarcastic?