Tom Mattson said:
No one has ever extrapolated the most fundamental known physical entities and interactions to a model of consciousness. In fact, no one has ever given a satisfactory account of consciousness that is purely physical. And the connection between consciousness and quantum theory is something that exists only in pop science literature, and in the minds of those who only know science at the popular level.
I would appreciate any comments you might have on a hypothesis which makes sense to me. I think it has some similarities to Ringo's, and it has some similarities to Berkeley's, although I don't ascribe any of the attributes to God that Berkeley does. Here is my hypothesis along with definitions for some of the terms I will use.
Definition: 'Consciousness' is the personal experience that I (the author of this post) have of perceiving, conceiving, remembering and willing, along with the experience of knowing that I have the capability to experience those four things. To the extent that there may be others (in particular, you, Tom and other readers of this post) who might experience consciousness, it seems reasonable and acceptable to me for them to define 'consciousness' from their own personal points of view rather than from mine. I think it is safe to assume that the different experiences of consciousness we share are similar enough to consider them to be the same type of thing.
Definition: 'Thought' is any and all information available to consciousness and which is associated with perception, conception, recall, or intent.
Hypothesis: The only thing that exists in reality is a single finite consciousness with its thoughts.
Extrapolation to physical entities: We can account for the existence of physical reality as patterns in the thoughts of the single finite consciousness. The basic strategy for this extrapolation is given by John Wheeler's "It from bit". That is, the trend in the identification of the fundamental constituents of matter and energy seems to point in the direction of those constituents being nothing more than information, i.e. vector spaces with the characteristics of fields, and sets of numbers (coordinates within the vector spaces along with quantum numbers) with the characteristics of particles. Therefore, since thoughts are information, and since these constituents are information, it is no stretch to suppose that physical reality in total is nothing but thoughts in that consciousness.
Connection between consciousness and quantum theory: Being one who knows science only at the popular level, I will look to you to straighten me out on this, Tom.
From what I understand, the outcome of certain physical interactions is indeterminate within some range of uncertainty, and that the actual outcome of any such event is "random", meaning unpredictable by human minds or instruments.
If you assume my hypothesis, then what we call physical interactions actually take place in the single consciousness as transformations of certain information which is associated with the particles and fields involved in the particular interactions. The range of uncertainty of the outcome of a particular quantum interaction allows the possibility for at least two mechanisms: 1. The single consciousness may use some type of randomizing algorithm to determine the outcome (God playing dice, in Einstein's terms), and 2. The single consciousness may exercise some amount of deliberate choice in determining the outcome of a particular interaction. Both of these make sense to me.
The explanation of the appearance of consciousness in association with brains is fairly straightforward. In the direction of brain to consciousness, as required for perception of physical phenomena, the only required mechanism would be for consciousness to be able to access, or attend to, certain of the patterns of information (thought) already present. That would seem to be a given.
In the other direction, i.e. from consciousness to brain, as in the initiation and execution of willful acts, some cause for some physical actions must be induced by conscious thought. Those initial actions, then, could cause a cascade of further actions eventually resulting in a pattern of firing of certain neurons, thus causing muscle action and all the consequences of that. The only mystery is how deliberate thoughts could cause the initial actions without breaking the laws of physics. With my admittedly naive understanding of quantum mechanics, I would like to humbly suggest that those initial actions might be putative "random" quantum events, which in reality would not be random but instead deliberately and consciously chosen. Given my hypothesis, this mechanism would also be straightforward.
As for the specific initial physical actions which might precipitate the chain of events culminating in a free-will-induced action, I think Penrose and Hammeroff have suggested a good possibility: the "flipping" of bi-stable dimers which are the fundamental molecular constituents of the microtubules in the neurons. I will leave it to them to elaborate on the details of how this might work.
I would appreciate anyone who will point out errors in my discussion or who will show how the problems raised by this hypothesis are any more difficult than the "hard problems" of explaining how consciousness can emerge from physical structures or how any physical structures might come into existence in the first place.
Happy New Year to all,
Paul