“If the universe were infinite, there would be infinite humans”
As discussed elsewhere in this thread, I think there are entirely plausible—perhape even probable! - cosmologies wherein an infinite universe can yield infinite Boltzmann Brains but not infinite humans. Having infinite humans would require infinite negentropy (or if you prefer infinite matter and energy), not just infinite spacetime. Boltzmann Brains could exist in an infinitely long, post-stellar-epoch, post-heat-death, maximum-entropy, infinite de-Sitter-space universe with no remaining free energy sources, but humans couldn’t.
“BBs with years worth of highly ordered pseudo-memories would be very rare compared to ones with chaotic pseudo-memories”
I agree, but if both types of Boltzmann Brains are infinite (even though one type is much more rare than the other) yet humans are finite, we’d expect most beings with our experiences to be those rare-type Boltzmann Brains, not humans. (I don’t use this to argue in favour of our being Boltzmann Brains, but as part of the paradox I set-out in a previous reply.)
As discussed elsewhere in this thread, I think there are entirely plausible—perhape even probable! - cosmologies wherein an infinite universe can yield infinite Boltzmann Brains but not infinite humans. Having infinite humans would require infinite negentropy (or if you prefer infinite matter and energy), not just infinite spacetime. Boltzmann Brains could exist in an infinitely long, post-stellar-epoch, post-heat-death, maximum-entropy, infinite de-Sitter-space universe with no remaining free energy sources, but humans couldn’t.
I agree, but if both types of Boltzmann Brains are infinite (even though one type is much more rare than the other) yet humans are finite, we’d expect most beings with our experiences to be those rare-type Boltzmann Brains, not humans. (I don’t use this to argue in favour of our being Boltzmann Brains, but as part of the paradox I set-out in a previous reply.)