While the linked to blog post discussion is somewhat interesting it seems misleading to call it a ‘many-world-like question’. In trying to extract the ‘rationalist moral’ from the link perhaps the best quote that I can extract is the preceding sentence:
from the hypothesis that the universe is infinite, it doesn’t logically follow that all possible Earth-like planets have to exist somewhere.
At a stretch the ‘rationalist moral’ could be the general principle ‘Don’t make logical errors just because infinity confuses you’. (I’d certainly endorse that as an often neglected insight!)
While the linked to blog post discussion is somewhat interesting it seems misleading to call it a ‘many-world-like question’. In trying to extract the ‘rationalist moral’ from the link perhaps the best quote that I can extract is the preceding sentence:
At a stretch the ‘rationalist moral’ could be the general principle ‘Don’t make logical errors just because infinity confuses you’. (I’d certainly endorse that as an often neglected insight!)