NOTE (to consciousness geeks): if you've already read this post, I've updated it with an admittedly geeky further description and critique of the "naturalistic dualism" espoused by philosopher David Chalmers. I did this after Googling that term and finding a blog post that I'd written in 2010 on this subject. If you're into zombies, you might find a mention of them interesting.
It's kind of weird that I have to distance myself from content on this blog in the title of this post.
That's due to me writing blog posts that I do my best to be scientifically and otherwise accurate, while the comments on those posts mostly come from other people -- some of whom either aren't as scientifically literate as I am, or purposely skew scientific truths to suit their religious ends.
One of the commenters in the purposely skew category would go nameless if I didn't name him, which I am: Spence Tepper. I respect Tepper in many regards. He is intelligent, a good writer, a regular visitor to this blog, and has contributed to lots of interesting comment conversations.
However, Tepper also has an annoying habit.
He is a master at avoiding direct questions that would prove him wrong, so he dissembles by trying to shift a comment conversation from the original topic where his position was on shaky ground to a different topic, apparently in hopes that no one will notice that when he was about to lose an argument, he starts anew with a fresh discussion.
I guess I respect this also about Tepper, but only in the sense of how I respect Donald Trump for his ability to entertain an audience and keep his approval rating up even in the fact of his constant lying, efforts to overthrow our democracy, two impeachments, and four indictments.
Tepper is a much better person than Trump, I want to be clear about that. It's just that I respect both men for using the qualities that I wish they didn't have in such a skillful fashion.
On the plus side, Tepper is a good example of someone who uses the God of the Gaps argument. Since I don't believe in God any longer, I've stopped being a God of the Gaps person, though I readily admit that in my true-believing days I acted much as Tepper does: using a limit of current scientific knowledge as an opportunity to fill that gap in understanding with.... God!
Instead of the more intellectually honest, We just don't know yet.
One of those current limits that Tepper and I agree on is that science doesn't yet know how consciousness arises in the brain.
There are various theories about how the 100 billion or so neurons in the human brain result in consciousness, which enables me to write this post and you to read it. Searches continue for the neural correlate of consciousness, meaning the part(s) of the brain that, when activated, enable consciousness to arise.
In a comment today, Tepper noted that this year philosopher David Chalmers won a 25 year old bet with neuroscientist Christof Koch in which Koch wagered a case of wine that by now the neural correlate of consciousness would have been discovered. A Scientific American story tells the tale, ending with:
Back to the bet between Koch and Chalmers: They agreed that, for Koch to win, the evidence for a neural signature of consciousness must be “clear.” That word “clear” doomed Koch. “It’s clear that things are not clear,” Chalmers said, and Koch, grimacing, concurred. He stalked off the stage and reappeared with a case of wine as the audience laughed and applauded.
Koch then doubled down on his bet. Twenty-five years from now, he predicted, when he will be age 91 and Chalmers will be age 82, consciousness researchers will achieve the “clarity” that now eludes them. Chalmers, shaking Koch’s hand, took the bet.
“I hope I lose,” Chalmers said, “but I suspect I’ll win.” I suspect so, too. I bet consciousness will be even more baffling in 2048 than it is today. I hope to live long enough to see Koch give Chalmers another case of wine.
Here's the thing, though, in regard to me and Spence Tepper. I never said that science had learned how consciousness arises in the brain. My contention, which Tepper disagreed with (which amazed me, since I'm clearly correct about this), was that the consensus of neuroscience is that goings-on in the brain result in consciousness, with nothing supernatural involved.
"Goings-on" is shorthand for something to do with the activity of those 100 billion neurons, but it is unknown what that is.
Again, this seems so obvious to me, given the many books about neuroscience and the current state of consciousness research I've read, along with articles in Scientific American and New Scientist that I subscribe to, I figured it would be easy for Tepper to agree that science considers the brain to be the source of consciousness.
I figured wrong, which led me to write a post decrying science denialism here on the Church of the Churchless: "Denying scientific truth isn't welcome on this blog." I didn't like how Tepper did the God of the Gaps thing, jumping to the completely erroneous conclusion that because science doesn't currently understand how consciousness arises, this opens the door to a supernatural explanation.
No, it doesn't. In fact, today I picked up a book I have by David Chalmers, the guy who won the bet with Koch, called The Conscious Mind: In Search of a Fundamental Theory. It was published in 1996, a few years before the bet occurred. In his Introduction, Chalmers speaks of three constraints that guided his development of an account of consciousness. Here's the third:
The third constraint is that I take consciousness to be a natural phenomenon, falling under the sway of natural laws. If so, then there should be some correct scientific theory of consciousness, whether or not we can arrive at such a theory. That consciousness is a natural phenomenon seems hard to dispute: it is an extraordinarily salient part of nature, arising throughout the human species and very likely in many others.
And we have every reason to believe that natural phenomena are subject to fundamental natural laws; it would be very strange if consciousness were not. This is not to say that the natural laws concerning consciousness will be just like laws in other domains, or even that they will be physical laws. They may be quite different in kind.
So what does Chalmers mean by "may be quite different in kind." Well, in chapter 4 of his book he speaks of naturalistic dualism. This is a complicated philosophical concept.
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NEXT DAY UPDATE: For sure it's complicated. This morning I started to reread that chapter, which is lengthy, but decided that would take too much time and effort. So I Googled "criticism of Chalmers naturalistic dualism." Among other results, a blog post that I wrote in 2010 popped up, "David Chalmers view of consciousness: naturalistic dualism." I was quite positive about the book, since it seemed in accord with science. Then I noted a comment on that post from David Lane who shared a link to a message from Chalmers about a New York Times review of his book by John Searle, along with a response from Searle. Interesting reading, if that link opens for you.
What struck me is that Chalmers bases his naturalistic dualism in part on a "zombie" argument. He imagines that zombies could exist that in a world that is just like ours, and where people act just like they do in our world, but don't have consciousness. This supposedly shows that consciousness is an add-on to the world, not an integral aspect of it. However, Searle makes some excellent arguments against this. Here's quotes from Searle:
In his argument for property dualism, he says, correctly, that you can imagine a world that has the same physical features that our world has—but minus consciousness. Quite so, but in order to imagine such a world, you have to imagine a change in the laws of nature, a change in those laws by which physics and biology cause and realize consciousness.
But then, I argued, if you are allowed to mess around with the laws of nature, you can make the same point about flying pigs. If I am allowed to imagine a change in the laws of nature, then I can imagine the laws of nature changed so pigs can fly. He points out, again correctly, that that would involve a change in the distribution of physical features, because now pigs would be up in the air. But my answer to that, which I apparently failed to make clear, is that if consciousness is a physical feature of brains, then the absence of consciousness is also a change in the physical features of the world.
That is, his argument works to establish property dualism only if it assumes that consciousness is not a physical feature, but that is what the argument was supposed to prove. From the facts of nature, including the laws, you can derive logically that this brain must be conscious. From the facts of nature, including the laws, you can derive that this pig can’t fly. The two cases are parallel. The real difference is that consciousness is irreducible. But irreducibility by itself is not a proof of property dualism.
...Chalmers resents the fact that I frequently try to remind him that brains cause consciousness, a claim he calls a “mantra.” But I don’t think he has fully appreciated its significance. Consciousness is above all a biological phenomenon, like digestion or photosynthesis. This is just a fact of nature that has to be respected by any philosophical account.
Of course, in principle we might build a conscious machine out of nonbiological materials. If we can build an artificial heart that pumps blood, why not an artificial brain that causes consciousness? But the essential step in the project of understanding consciousness and creating it artificially is to figure out in detail how the brain does it as a specific biological process in real life.
Initially, at least, the answer will have to be given in terms like “synapse,” “peptides,” “ion channels,” “40 Hertz,” “neuronal maps,” etc., because those are real features of the real mechanism we are studying. Later on we might discover more general principles that permit us to abstract away from the biology.
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This passage makes it fairly clear, though not crystal clear.
It remains plausible, however, that consciousness arises from a physical basis, even though it is not entailed by that basis. The position we are left with is that consciousness arises from a physical substrate in virtue of certain contingent laws of nature, which are not themselves implied by physical laws. This position is implicitly held by many people who think of themselves as materialists. It is common to hear, "Of course, I'm a materialist, the mind certainly arises from the brain."
OK, so maybe if I reread the book, I'd realize that I'm open to naturalistic dualism. The key thing here, though, is that the guy who took the side of the bet against Koch considers that consciousness is a natural phenomenon arising in the brain, not a supernatural phenomenon.
This is the prevailing view of virtually every neuroscientist, which makes Tepper's refusal to admit this so perplexing and, yes, irritating. I think, Dude, I'm right about science viewing consciousness as arising from goings-on in the brain; what's so tough about simply saying, I agree?
I find it easy to admit when I'm wrong, in part because I've been married for 51 years (albeit in two chunks, 18 years in my first marriage, 33 years and counting in my second marriage), so I'm all too aware of how often my wife is right and I'm wrong.
I feel that it wouldn't hurt Tepper to do the same thing -- one reason why I persist in my possibly quixotic quest to have Tepper admit that the current conclusion of neuroscience is that consciousness arises in the brain.
Pleasingly, another commenter, Sant64, who thought he was refuting my position, actually helped strengthen it in his own comment today. Here's how I used that gift in my comment reply.
Sant64, thanks SO MUCH for sharing the link that EXACTLY supports what I've been arguing with Spence Tepper about. (I like capital letters also at times, just like you.)
Contrary to what you falsely claimed, my assertion in regard to Tepper is that there's a consensus among neuroscientists that consciousness arises from goings-on in the brain, not from some supernatural source. I've never said that neuroscience understands HOW this happens, just that brain stuff causes it to happen.
The quote you included in your comment says exactly what I've been claiming.
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https://www.frontiersin.org/articles/10.3389/fnhum.2022.767612/full#:~:text=There%20is%20no%20consensus%20about,the%20action%20of%20the%20brain.
The following is from the Frontiers in Human Neuroscience Journal:
"Studies of how consciousness is generated, and why it has the characteristics it does, is nevertheless a focus of considerable interest and effort. There is no consensus about how it is generated, or how best to approach the question, but all investigations start with the incontrovertible premise that consciousness comes about from the action of the brain."
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I love that clear statement. I'll repeat it because I love it so much: "All investigations start with the incontrovertible premise that consciousness comes about from the action of the brain."
That's just what I've been asking Tepper to admit is true. And now you've provided clear documentation that I'm correct in saying that it indeed is true that consciousness arises from goings-on in the brain. It's still a few days from Thanksgiving, but I'm really thankful to you for finding this quote. Hopefully Tepper will take it to heart.
Spence Tepper, thanks for your comment also. Naturally I was aware of the bet between Koch and Chalmers. It gets talked about quite a bit in stories and books about the nature of consciousness. My reaction to what you said is pretty much the same as what I just said to Sant64 above: I agree, and always have, that neuroscience hasn't learned how consciousness arises in the brain.
Where you and I disagree, and where I view myself as being right and you being wrong, is about whether the consensus of neuroscientists is that goings-on in the brain, so far unspecified, lead to the creation of conscious experience. (There's debate about whether consciousness is a thing or a process; I tend to prefer process, but it could be a thing.)
Do you agree with the quote Sant64 shared above? "All investigations start with the incontrovertible premise that consciousness comes about from the action of the brain." A simple YES or NO would be appreciated, no dissembling.
If you say yes, great, we're in agreement. If no, please supply evidence that serious peer-reviewed investigations of consciousness are taking place that DON'T have the premise that consciousness comes about from the action of the brain.
The situation is similar, in my opinion, to how physics is examining the unsolved question of how gravity works. Einstein's general theory of relativity says that gravity is the result of curved spacetime in the presence of mass. Quantum mechanics hasn't arrived at a theory of gravity yet, though several leading theories exist, in the same way neuroscientists are exploring theories of how consciousness arises.
But here's the thing: I've never heard of a physics theory that says gravity is the result of some supernatural force. Sure, maybe there is some unknown material/natural force involved, but not supernatural. Likewise, I've never heard of a respected (as opposed to crackpot) neuroscience theory that says consciousness is the result of some supernatural force.
Again, if you agree that consciousness, like gravity, is the result of natural/physical/material goings-on, then we see this area of science similarly. There's a lot to learn, but what will be learned will, with virtual near certainty, involve material laws of nature, not supernatural.
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