- #211
loseyourname
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hypnagogue said:Not necessarily. If we find that B always accompanies C, it could be because there is some sort of causitive link between the two. However, it could also be that they are both caused by A. In that case, although they are always correlated, one does not cause the other.
That's why it is inconclusive evidence. It is, nonetheless, evidence. Seeing someone at the scene of a crime is evidence that he committed the crime. Scanty evidence, but still evidence.
Chalmers proposes that phenomenality is an aspect of information, and Rosenberg proposes that phenomenality is the intrinsic basis of the physical. In both cases, phenomenality does not arise from the physical, but (in some sense) sits along side it. Surely, both accept that the structure and function of the physical brain conditions the nature of a system's p-consciousness, but I don't think either view can be fairly portrayed as saying that consciousness arises from, or is a product of, the brain.
What you are saying doesn't make any sense to me. Phenomenality is an aspect of information. Information, in humans, is stored in and processed by the brain. The information that has phenomenality as an aspect is a product of the brain. In what sense can we say that the brain is not here a cause of consciousness. There is no case in which a brain can process the information that it does and not produce consciousness. Again, strictly speaking, information processing devices other than the brain may produce consciousness. In this case, a brain is not necessary. A brain is, however, necessary for human consciousness, at least until we are able to transfer our selves into information processing machines that can carry out the same functions as a brain.
In the case of Rosenberg's framework, again, is it not the intrinsic base of the physical makeup of the brain that results in human consciousness? If no brain is present, there is nothing that we recognize as consciousness. He is simply postulating properties of the substance of which the brain (indeed, all physical things) is made that are not physically detectable. They are nonetheless, properties of the substance of which the brain is made. We never experience what happens in the non-physical parts of our lymph nodes.
In fact, insofar as both accept the logical possibility of zombies, both would claim that we could have a physical brain (in a world distinct from ours in its non-physical aspects, but identical to ours in its physical aspects) but still not have p-consciousness.
I don't know about Rosenberg, but I remember Chalmers explicitly stating in a paper that you linked to that zombies are an empirical impossibility granted that they have the same brains we have. Logical possibility only means that no contradiction arises. By the same token, no contradiction arises if we imagine that the Earth had no gravitational field. Nonetheless, you are never going to find a person jump at a velocity less than escape velocity and fail to come back down.
So perhaps Chalmers and Rosenberg might say that the physical brain causes p-consciousness to take the particular form it does, but neither would say that the physical brain produces p-consciousness, in the sense that the latter supervenes on the former.
I'm only claiming that what the brain causes is human consciousness. It may not be necessary to all forms of subjective experience, but it is certainly necessary for my subjective experience. Without the brain, my ego, my personality, the world-line of subjective experience that is Adam Acosta, would cease to exist (again, unless Chalmers and Dennett are right and we devise a means of transferring the necessary information-stream into a machine).