ConradDJ said:
My point is that we know how to describe the world-in-itself objectively, and also how to describe our own subjective experience. But we don’t yet have the categories to describe a system that can meaningfully define information through interaction between different points of view.
I believe we take opposing (yet complementary) positions here. You are taking
difference as fundamental, whereas I see the flat featurelessness of equilbrium as the fundamental ground of reality.
We both agree to a basically dynamic or process ontology - the world is formed of its interactions. But you are concerned by the way a world can become complexly structured with embedded differences - the preservation of multiple viewpoints that makes reality a richly organised something. Whereas I say a structured world is a secondary and passing thing. The fundamental level of reality is instead a world where all differences have been thermalised, all viewpoints equilibrated away to create a flat, homogenous, informationless, realm.
This is the story of the universe, which starts in featureless thermal equilbrium (the big bang) and will end in the same (the heat death). So that is its fundamental state - a mass of interactions, a mass of dynamism, but ruled by maximum entropy.
Then secondarily, informational structures - complexity - can arise as the universe is sliding down its entropic gradient. You do get the phase transition that spits out a bunch of matter particles. You do get the gravitational clumping that creates a "structure of viewpoints". You do get dissipative structures like stars, and then planets coated with life.
All this negentropy (locally orderly and distinct information-preserving viewpoints vs global thermalisation) is of course paid for by the fact it accelerates the more general entropification.
You can relate human consciousness to this negentropic dissipative structure story. The universe wants to be flat and lacking in difference (thermalised). The human brain/mind is a highly structured point of view which balances the second law's books by being such a powerful entropy-producing device.
Just the brain alone burns more calories than muscle as a tissue. Humans had to be big consumers to have big brains.
And modern civilised humans are quite incredible entropifiers - way beyond anything else nature has invented. In a couple of hundred years, we will manage to waste a billion years accumulation of fossil fuel - enough to change a planet's climate.
So human consciousness is a "particular viewpoint" in directly measurable terms. The average state of the universe is measured by the spreading and cooling of the CMB - that is the baseline thermalisation process, the flat rate dynamic. Humans are then a highly localised acceleration of this general rate. Which is why we do feel so subjectively apart from this objective reality.
Where does QM fit into this? Well you can perhaps see that I take thermodynamics - the logic of equilibria - as being metaphysically basic. It is the systems view. QM (and relativity, and the standard model, and Newtonian mechanics, etc) would all have to assimilate to this more basic or generalised description of reality. Which is why I favour decoherence approaches to QM for instance - the powerlaw averaging away of QM's uncertainties and indeterminancies in the real thermal world.
But anyway, returning to your key point - the having of
local points of view is all about the having of a more fundamental global state of equilibrium. First we must have a baseline state which is flat and lacking difference - a thermalised state. Then we can talk about localised departures from that state as being "a point of view". And the physical theory that talks directly about this is thermodynamics (and its modern extensions, like dissipative structure theory), not QM, relativity, or anything else that is usually treated as metaphysically fundamental.
A theory of consciousness (the subjective) should be rooted ultimately in thermodynamics. And so should a theory of the universe (the objective).
Of course, this is a radical proposal as most would still see thermodynamics being a body of theory that needs to be assimilated to something else, like QM, rather than the other way round.
But that just makes it an interestingly contemporary question.
What is the baseline description of reality? Is it about the naming of the parts (the search for concrete local differences - like the particle zoo) or about the self-organisation of the whole (a rationale based on global dynamic equilibrium).
QM shows how particles, like the solitons of condensed matter physics, dissolve into uncertainty when you remove their constraining context (but QM just models the dissolution and not the "collapsing observation", the constraints that are the shaping context).
So QM demonstrates that a systems approach is necessary to make reality logical again. But it is not a systems model. Whereas thermodynamics is.