 David Lewis doesn’t face this problem due to his concretist theory of possible worlds. Lewis holds that, in addition to the world we live in, there are many other concrete worlds of the same kind as the world we live in. Moreover, he holds that contained in some of these worlds are 500 kg duplicate men, some of whom are popular, and some of whom are not. Given Lewis’s concretist theory of possible worlds, then, being a popular man who is 500 kg is classified as extrinsic by (12).