The Boltzmann brain thought experiment suggests that it might be more likely for a single brain to spontaneously form in a void, complete with a memory of having existed in our universe, rather than for the entire universe to come about in the manner cosmologists think it actually did.
The Boltzmann brain
https://m.youtube.com/watch?v=4Stzj2_Rlo4
Fuck fuck fuck
There’s a story or comic I read recently about a man who realises he is a Boltzmann Brain and had dreamt up the world around him to stave off madness.
https://www.badspacecomics.com/post/boltzmann