Boltzmann brain

And so, if not the work of a giant brain, then what if reality is the result of just one brain, yours? On Earth, we call this notion solipsism, the somewhat narcissistic assertion that only your mind can be guaranteed to exist, and that everything else, no matter how convincing, should be taken as if it were a dream.

In space, however, this idea takes on a more otherworldly and unsettling form, an isolated, tortured Boltzmann brain floating in the darkness of space, unable to escape its perpetual slumber.

A Boltzmann brain is a structure that emerges from random, spontaneous fluctuations in an eternal vacuum.

As an arbitrarily improbable alignment of particles momentarily assumes the form of a human brain in space, complete with a set of falsified memories of being alive in our universe.

In this scenario, the idea of a finely-tuned cosmos is disregarded entirely in favor of a near vacuum that spends the majority of eternity in a featureless state of heat death, with only random, inconsequential microscopic fluctuations for the most part.

But given enough time, far exceeding the conventional cosmic timescales to which we are accustomed, an almost impossibly rare sequence of thermal fluctuations would give rise to a structure which spontaneously emulates the neural pathways of a conscious brain, your brain.

Even if only for an instant, you would then find yourself trapped in a falsified, protracted delusion of reality, believing you existed in a finely-tuned universe while your true being floats through an empty, timeless void, blissfully unaware of the terrifying truth.

Though not actually a solution to the question of fine-tuning, its architect, Ludwig Boltzmann, used it to challenge the then-contemporary assumption that the universe must be infinite, arguing that random fluctuations would be much more likely to birth a one-off, disillusioned Boltzmann brain on a small scale than they would a living, large-scale planet with some eight billion human brains existing simultaneously.

And presumably neither is the nebula.

The Boltzmann brain, Deborah the nebula, Rukiya, all one in the same.

It's a, it's a very Holy Ghost sort of thing.

Mm-hmm.

[laughs]

Why is she...

If she's been absorbed, right, into the, into the Boltzmann brain, why is she then not allowed to, like, watch what happens on, in, like, you know-

Mm-hmm

Or he may not have.

filed a report on it given but because I guess it wasn't in the ship's records that his daughter Rukia was even on the ship he was keeping that hidden What I found kind of a problem with this episode was, well, if Rukia has merged with this Boltzmann brain, then and by the way, for folks who may not be aware, Boltzmann brain is a concept from physics.

It's named after a physicist named Boltzmann, who but the idea is if you have a universe of.

randomly configured and colliding particles, they're more likely to condense into just a brain that can have thoughts, even though it didn't biologically evolve from previous life forms, and that random fluctuations are going to generate more random consciousnesses in this way than evolution and normal biological reproduction would.

They should have said it clearer than they did.

Yeah.

But when the crew showed up again, the Rukia Boltzmann brain consciousness sensed Lon's crisis emotionally about her and her shadow self and decided to weave the narrative around him to help her out.

Okay.