Natural science is the branch of science that deals with the material world, e.g., physics, chemistry, and biology. Given this, there is no reason to assume, as you appear to be, that ‘consciousness’ cannot be reduced to the neurological function of the brain and nervous system. Or that ‘consciousness' is anything more than a biological system accessible to examination by the physical sciences.
You are straying into the social sciences by introducing psychology. Even so, Daniel Dennett, whom you previously resisted, is well equipped to deal with these questions. He is, after all, a philosopher, writer, and cognitive scientist whose research centres on the philosophy of mind, philosophy of science, and philosophy of biology. It is he who says: “I suspect that dualism would never be seriously considered if there weren't such a strong undercurrent of desire to protect the mind from science, by supposing it composed of a stuff that is in principle uninvestigatable by the methods of the physical sciences”. With all due respect, I think this applies to you.
You seem to be confusing ‘psychology’ with ‘consciousness’; the former is the province of the social sciences, i.e. the study of people and societies, whereas the latter belongs to the physical sciences, which deal with the material world including biology...see above. It is the latter that concerns us here.
Let us be clear: I don't assume anything. I
affirm that the language that actually describes human behaviour and mental activities cannot be translated into the language of neurology and much less into that of physics or biology (natural sciences)
at this moment.
Physics and biology don't study the human behaviour as a whole. Psychology does it. To do this, it uses categories that are specific. Some are the outcome of nervous system research; others depend on observing human behaviour; others involve mental actions that are not directly observable.
Psychologists know full well that the latter cannot be translated into a physicalistic language, that is, limited to concepts of biology, neurology and behavioural observation. I asked you to present some research in this regard and, of course, you were not able to provide any.
Instead, you provide a text from a philosopher, Daniel Dennett, who is an expert in philosophy of language and a disciple of another language philosopher I know well, Gilbert Ryle. All my respects to them, but by quoting them here you agree with me. The problem of the relations between mind and brain is a philosophical problem, not a scientific one.
To clarify my position, I bring you a text by Dennett. As you will see it is not written in the natural science format and includes concepts such as "rejected as irrelevant by the agent consciously" that would not fit into a physicalistic language.
The model of decision making I am proposing has the following feature: when we are faced with an important decision, a consideration-generator whose output is to some degree undetermined, produces a series of considerations, some of which may of course be immediately rejected as irrelevant by the agent (consciously or unconsciously). Those considerations that are selected by the agent as having a more than negligible bearing on the decision then figure in a reasoning process, and if the agent is in the main reasonable, those considerations ultimately serve as predictors and explicators of the agent's final decision. (Brainstorms: Philosophical Essays on Mind and Psychology, MIT Press (1978) Drawn from Wikipedia)
This fragment supports my main idea: the description of mental processes cannot be made in terms of the natural sciences
now, nor is it predictable in the short term. Difficulties can be either surmountable or insurmountable.
I have never stated the latter!