Do you agree, then, that psychology, insofar as it is the science of consciousness, is in principle capable of the same degree of precision and objectivity as is physics? — Wayfarer
I don’t believe in a science of consciousness as a thing. I believe in a science of life and mind - of biosemiosis.
Is consciousness a substance or a process? Have you got it clear what kind of "scientific" account you are even committed to?
People betray their substance ontology by talking of consciousness as a fundamental simple. A property or quality. They will talk indeed of "qualia" and "phenomenology" as if they are very sciency bits of jargon. They get enthusiastic about quantum conscious, panpsychism, information theory, and other crackpot proposals because that sounds like science "heading in the right direction".
But I understand life and mind as processes. Consciousness is not a noun but a verb. And if I say I am conscious, it is of something. What I really mean is that I can attend and report. I can introspect in the socially approved fashion of turning my neurobiology of attention onto even things that I wouldn't naturally waste time noticing – like the "redness" of red – and speak about it in a narrative fashion as something that "I" have "experienced".
So to be able to look inwards and report is a skill we learn that boils down to being socially trained to use language to direct our attention to all the "phenomenology" that our brain is instead evolved just to "look past". The brain is busy trying to assimilate the world to its running predictive models. Society sets itself up as a higher level self in our heads and demands a full account of all our thoughts and feelings so that we can become "self-regulating" beings – aware of ourselves as actors within larger sociocultural contexts.
Consciousness is treated as a big deal in modern culture because it really matters to society that it can sit inside our heads and make sure we run all our decisions through its larger filter. We must notice the details and be ready to report them.
I've said often enough that I can drive in busy traffic without taking in the world as anything more than a vague unremembered flow. Society would be aghast to hear that admitted. We are supposed to always be giving full attention to everything and holding it in memory long enough to report exactly what happened in the event we had to offer a full narration in a court of justice.
But the brain evolved not to pay attention to the world as much as possible by sensible design. And until humans wrapped themselves up in the new collective habit of narrative self-regulation, that is all brains did. Act as "unconsciously" as circumstances would allow. Stopping to note every passing detail was not what "being conscious" was about.
So any scientific theory of consciousness starts with accepting we are dealing with an evolved process not a fundamental substance. And then the first practical bit of business would be deflating the overly socially-constructed notion of consciousness that everyone employs.
After that, the real science could begin.
As I have said, biosemiosis, the modelling relation, Bayesian mechanics, are what I regard as the right kind of approach. They say life and mind arise out of material being, but they have a difference. There is some mechanism or algorithm by which they can grow out of a physical substrate.
This clicks into place when the material ground is understood in the language of dissipative structure. Matter poised at criticality is a source of instability that can be tapped to do stuff by forms that can impose the constraints of mechanistic stability.
An engine can capture an explosion of petrol vapour and force it to turn a crank. A source of physical instability can be harnessed to give a stablised output. Information (as structural negentropy) can regulate the flow of entropy.
So where nature exhibits physical criticality - as it does at the quasi-classical nanoscale – there is an instability which can be fruitfully ratcheted to support a living and mindful organism. There is something a mechanism or algorithm can latch on to and start to proliferate.
The job of science thus becomes creating a generalised theory of such a mechanism or algorithm. Identify the exact design of this essential scrap of form from which wild and complex growth can result. Discover the very thing that makes an organism an organism.
And that is what biosemiosis/the modelling relation/Bayesian mechanics are about. Writing the specifications of the self-organising growth algorithm that allowed this thing we call life and mind to take hold on a material substrate and begin to grow – to develop and evolve.
Friston does want to make it as precise and objectified as physics. He offers differential equations that sum up the central trick of the modelling relation. He calls it Bayesian mechanics so that it can sit alongside classical mechanics, statistical mechanics and quantum mechanics.
And regardless of how you judge his actual formula, at least we know this is what a science of life and mind would look like if it were to achieve the same kind of general format as the physical sciences.
You seem to think science must give some kind of account of all your attended and reported experiences and feels as if they were atomised "states of being" – qualitative stuff. But life and mind are processes that exist parasitically on the Universe as itself a process. There is dissipative structure and then organisms that ratchet dissipative structure.
And the discovery that there is just the one kind of negentropic growth algorithm that explains how evolution could take hold – the algorithm that is the semiotic and Bayesian modelling relation – is the kind of huge simplification we were hoping for from science.