DBT writes:
I am not 'reducing' anything. The available evidence supports the proposition that it is the brain that is the sole author of conscious experience. This is not reductionism. It is a broad outline of our current understanding.
Yes. You are not reducing anything. That means you are not reducing mind to material processes. You aren't because you can't. But, if you are to assert that mind is nothing but material processes, you MUST reduce it. And since you can't, there is no reason to assume that it must be true. I might be true, but we can not show that so far.
What is not supported is the proposition of non material elements at work within the brain, where the proposition of a non material element is not required as an explanation for brain function.
Mind is not material. You've admitted that you can't reduce it to material processes. So it is not material, or at least, it can't be proven to be.
Consciousness is not required to explain ANY human function. All of our behavior can be explained, in principle at least, through information processing. And when we're done explaining all of that, we still have consciousness left over. That's the "hard" problem.
And again: what exactly is the nature of this non material substance?
YOU are the nature of this non-material substance. Of course, your body is material but your psychology, your self-identity, your thoughts and your feelings are NOT material. Why is that so hard to understand?
Of course, maybe someday science will come up with the answer. But to make that claim is to argue from faith not science or reason. As I've already noted (several times, I think), the inability of science or even philosophy to come up with a solution to the problem, even in principle, is what has led theorists in the philosophy of mind to look to other alternatives which may prove to be more fruitful.
No, science may or may not crack the mechanism of consciousness, but meantime it is poor practice to propose a 'solution' - a non material entity - where non is required. As its been pointed out, this is another version of god of the gaps.
A non-material proposal IS required due to the failure of materialism. Gee, why did Lavoisier come up with his ridiculous notion of oxygen when it wasn't required. After all, we already knew all about phlogiston.
The real problem isn't explaining mind, it's explaining matter. That's what Descartes work was all about. Mind was a given. How do you know that matter exists? How do you know the external world isn't just a figment of your imagination? Matter is the metaphysical entity, not mind. Check out George Berkley on this one. I don't need matter to explain the universe. If some thing is hard, I know that hardness exists. Why do I need to invent a metaphysical entity that
causes the hardness. What exists besides mental qualities? And how do you prove that existence?
You've got the cart before the horse. Why should we assume that it is physical? Only if you are committed to a materialist position in the first place, would you make that assumption. We have no evidence that consciousness is physical so the idea that it might be physical is only one option among many that we could consider.
We assume that it is physical because a brain is a complex physical structure that processes physical information through physical means, ion flow, chemical markers, modifiers, etc, and responds through physical means.
How do you know that? We know that the brain transmits various electrical pulses. What makes these pulses information? They only become information to a conscious observer. So you need the non-material conscious observer even to explain the brain in terms of information processing.
There is nothing that even suggests the presence of a non physical element.
See above.
Again: what is the nature of something non physical? What does it explain? What do we know about it?
There is your god of the gaps.
I've already answered this. YOU are that nature. Your mind is non-physical.
If we go where science and reason leads us, it does not, at the present state of our knowledge, leads us to the conclusion that consciousness is physical.
Please provide an argument for your proposition.
Are you kidding? What the hell has this entire discussion been about? You are so close-minded in your materialism that you are unable to find even yourself. You believe you are nothing but a robot. But take a minute to realize that you are not a robot, and what makes you not a robot is what you are failing to see.
You are what is left over after the robot is accounted for, and it is not material.