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Unconscious/Chalmers: only a small part of the information of human cognition seems to correspond to the information of conscious experiences. Most of it is unconscious. If the two-aspects principle applies unreservedly, then the "unconscious" information is realized in experiences, but not in our experiences! (> Panpsychism,> Thermostat), e.g. if we assume that individual neurons can have experiences of me like a thermostat.
The overall system of my brain is then only a system of a set of systems, namely that which has the global control. Evolution has shaped such systems to form a coherent cognitive structure.
Brain: when we accept this, we can also assume that different sets of experiences take place in a set of information spaces.
Then I may have a number of related but slightly different phenomenal relatives from processes in my brain.
This follows only from the unrestricted two-aspect principle. The alternative is to limit this principle so that the amount of physically realized information spaces is reduced, preferably by limiting how information is processed.
Criterion: for a "real" information processing the criterion might be the strength of the signal, or the type of causation.
The Conscious Mind Oxford New York 1996
Constructing the World Oxford 2014