consciousness then evolves into telepathy..the scientists while hard at work studying these growing cell masses then start hallucinating while in the presence of the mini brains, driving them into insanity.. and next thing you know we've gone full on Akira and the destruction of neo Tokyo is imminent
Is it possible to write a story from the perspective of the brain? Would the first few pages or even the first chapter just be blank or would it be nonsensical noise?
Would it even make sense to use words? Maybe a visual/interactive medium like a game would make more sense.
On that note, what does somebody who was born blind perceive? Do they perceive blackness or is there no sense of sight at all?
Boltzmann Brains don't fluctuate into existence, they get created when entropy is moderate enough to produce galaxies with people in them that develop tech for cloning.
Probably some of scale - while body and brain size map together well enough that tanners knew that any creature had enough brains to tan their hide there are limits to how small a viable brain may be. Second would be exposure towards some sort of input to respond to.
One may hope so, though even nature has never shown itself to be kind about things, merely expedient.
Just as when the discussion is about AI, it is my sad belief that we as a species do not have a single concept of consciousness sufficient to even be tested for, merely a collection of vague ideas that at best refer to each other and at worst to nothing at all.
https://en.wikipedia.org/wiki/Cerebral_organoid#Ethics