Abstract

Three big philosophical problems about consciousness are: Why does it exist? How do we explain and understand it? How can we explain brain-consciousness correlations? If functionalism were true, all three problems would be solved. But it is false, and that means all three problems remain unsolved (in that there is no other obvious candidate for a solution). Here, it is argued that the first problem cannot have a solution; this is inherent in the nature of explanation. The second problem is solved by recognizing that (a) there is an explanation as to why science cannot explain consciousness, and (b) consciousness can be explained by a different kind of explanation, empathic or “personalistic” explanation, compatible with, but not reducible to, scientific explanation. The third problem is solved by exploiting David Chalmers“principle of structural coherence”, and involves postulating that sensations experienced by us–visual, auditory, tactile, and so on–amount to minute scattered regions in a vast, multi dimensional “space” of all possible sensations, which vary smoothly, and in a linear way, throughout the space. There is also the space of all possible sentient brain processes. There is just one, unique one-one mapping between these two spaces that preserves continuity and linearity. It is this which provides the explanation as to why brain processes and sensations are correlated as they are. I consider objections to this unique-matching theory, and consider how the theory might be empirically confirmed.

Highlights

  • I am inclined to think that there are three basic philosophical1 problems that arise in connection with consciousness

  • What is so baffling and mysterious about consciousness is that each one of us knows it exists, and knows what it is, because we possess it, we are it, in a certain sense; and yet, if we examine a conscious brain, we find such things as neurons and synaptic junctions, but nothing remotely like consciousness as we experience it

  • Functionalism solves the third problem, the problem of what possible explanation there can be for the way brain processes and sensations are correlated

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Summary

Nicholas Maxwell

It is false, and that means all three problems remain unsolved (in that there is no other obvious candidate for a solution). The third problem is solved by exploiting David Chalmers’ “principle of structural coherence”, and involves postulating that sensations experienced by us—visual, auditory, tactile, and so on—amount to minute scattered regions in a vast, multi-dimensional “space” of all possible sensations, which vary smoothly, and in a linear way, throughout the space. There is just one, unique one-one mapping between these two spaces that preserves continuity and linearity. It is this which provides the explanation as to why brain processes and sensations are correlated as they are.

The Three Problems
Functionalism Is Not Correct
Experiential Functionalism
Can the Existence of Consciousness Be Explained?
Conclusion

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