The point I was making is that people do discuss probabilities of different worlds that are not seen as possibilities for some single world. And comparing probabilities of different worlds in themselves seems to be an error for basically the same reason as comparing probabilities of two cities in themselves is an error. I think this is an important error, and realizing it makes a lot of ideas about reasoning in the context of multiple worlds clearly wrong.
The point I was making is that people do discuss probabilities of different worlds that are not seen as possibilities for some single world. And comparing probabilities of different worlds in themselves seems to be an error for basically the same reason as comparing probabilities of two cities in themselves is an error. I think this is an important error, and realizing it makes a lot of ideas about reasoning in the context of multiple worlds clearly wrong.