From https://news.ycombinator.com/item?id=35622236 https://westurner.github.io/hnlog/#comment-35622236 :

> If quantum information is never destroyed – and classical information is quantum information without the complex term i – perhaps our brain states are already preserved in the universe; like reflections in water droplets in the quantum foam.

> Lagrangian points, non-intersecting paths through accretion discs, and microscopic black holes all preserve data - modulated energy; information - for some time before reversible or unreversible transformation.

How do phonons interact with such phenomena?

> Perhaps Superfluid quantum gravity can afford insight into the interior topology of black holes and other quantum foam phenomena?