TimS comments on If there IS alien super-inteligence in our own galaxy, then what it could be like? - Less Wrong
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If physics allows for the spreading across alternative universes at a rate greater than that at which you can spread across our universe, the Fermi paradox becomes even more paradoxical.
Not necessarily - See Hilbert's Paradox.
https://en.wikipedia.org/wiki/Hilbert%27s_paradox_of_the_Grand_Hotel
This is only a paradox under naive definitions of infinity. Once one starts talking about cardinality, the "paradoxical" nature of the thought experiment fades away.
In other words, this is not really responsive to James_Miller's comment.