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Hofstadter's long-awaited return to the themes of Gödel, Escher, Bach--an original and controversial view of the nature of consciousness and identity. What do we mean when we say "I"? Can a self, a soul, a consciousness, an "I" arise out of mere matter? If it cannot, then how can you or I be here? This book argues that the key to understanding selves and consciousness is a special kind of abstract feedback loop inhabiting our brains. Deep down, a human brain is a chaotic soup of particles, on a higher level it is a jungle of neurons, and on a yet higher level it is a network of abstractions that we call "symbols." The most central and complex symbol in your brain or mine is the one we both call "I." But how can such a mysterious abstraction be real--or is our "I" merely a convenient fiction?--From publisher description.… (more)
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Douglas Hofstadter is not a philosopher (though he's friends with one), and in "I am a Strange Loop" he is mightily disdainful of the discipline and its weakness for cute logical constructions. All of metaphysics is so much bunk, says Hofstadter, and he sets out to demonstrate this using the power of mathematics and in particular the fashionable power of Gödel's incompleteness theory.
Observers may pause and reflect on an irony at once: Hofstadter's method - derived *a priori* from the pure logical structure of mathematics - looks suspiciously like those tricksy metaphysical musings on which he heaps derision. As his book proceeds this irony only sharpens.
But I'm getting ahead of myself, for I started out enjoying this book immensely. Until about halfway I thought I'd award it five stars - but then found it increasingly unconvincing and glib, notably at the point where Hofstadter leaves his (absolutely fascinating) mathematical theorising behind and begins applying it. He believes that from purely logical contortion one may derive a coherent account of consciousness (a purely physical phenomenon) robust enough to bat away any philosophical objections, dualist or otherwise.
Note, with another irony, his industry here: to express the physical parameters of a material thing - a brain - in terms of purely non-material apparatus (a conceptual language). In the early stages, Professor Hofstadter brushes aside reductionist objections to his scheme which is, by definition, an emergent property of, and therefore unobservable in, the interactions of specific nerves and neurons. Yet late in his book he is at great pains to say that that same material thing *cannot*, by dint of the laws of physics, be pushed around by a non material thing (being a soul), and that configurations of electrons correspond directly to particular conscious states in what seems a rigorously deterministic way (Hofstadter brusquely dismisses conjectures that your red might not be the same as mine). Without warning, in his closing pages, Hofstadter seems to declare himself a behaviourist. Given the excellent and enlightening work of his early chapters, this comes as a surprise and a disappointment to say the least.
Hofstadter's exposition of Gödel's theory is excellent and its application in the idea of the "Strange Loop" is fascinating. He spends much of the opening chapters grounding this odd notion, which he says is the key to understanding consciousness as a non-mystical, non-dualistic, scientifically respectable and physically explicable phenomenon. His insight is to root consciousness not in the physical manifestation of the brain, but in the patterns and symbols represented within it. This, I think, is all he needs to establish to win his primary argument, namely that Artificial Intelligence is a valid proposition. But he is obliged to go on because, like Darwin's Dangerous Idea, the Strange Loop threatens to operate like a universal acid and cut through many cherished and well-established ideas. Alas, some of these ideas seem to be not ones Douglas Hofstadter is quite ready to let go.
The implication of the Strange Loop, which I don't think Hofstadter denies, is that a string of symbols, provided it is sufficiently complex (and "loopy") can be a substrate for a consciousness. That is a Neat Idea (though I'm not persuaded it's correct: Hofstadter's support for it is only conceptual, and involves little more than hand-waving and appeals to open-mindedness.)
But all the same, some strange loops began to occur to me here. Perhaps rather than slamming the door on mysticism, Douglas Hofstadter has unwittingly blown it wide open. After all, why stop at human consciousness as a complex system? Cconceptually, perhaps, one might be able to construct a string of symbols representing God. Would it even need a substrate? Might the fact that it is conceptually possible mean that God therefore exists?
I am being mendacious, I confess. But herein lie the dangers (or irritations) of tricksy *a priori* contortions. However, Professor Hofstadter shouldn't complain: he started it.
Less provocatively, perhaps a community of interacting individuals, like a city - after all, a more complex system than a single one, QED - might also be conscious. Perhaps there are all sorts of consciousnesses which we can't see precisely because they emerge at a more abstract level than the one we occupy.
This might seem far-fetched, but the leap of faith it requires isn't materially bigger than the one Hofstadter explicitly requires us to make. He sees the power of Gödel's insight being that symbolic systems of sufficient complexity ("languages" to you and me) can operate on multiple levels, and if they can be made to reference themselves, the scope for endless fractalising feedback loops is infinite. The same door that opens the way to consciousness seems to let all sorts of less appealing apparitions into the room: God, higher levels of consciousness and sentient pieces of paper bootstrap themselves into existence also.
This seems to be a Strange Loop Too Far, and as a result we find Hofstadter ultimately embracing the reductionism of which he was initially so dismissive, veering violently towards determinism and concluding with a behavioural flourish that there is no consciousness, no free will, and no alternative way of experiencing red. Ultimately he asserts a binary option: unacceptable dualism with all the fairies, spirits, spooks and logical lacunae it implies, or a pretty brutal form of determinist materialism.
There's yet another irony in all this, for he has repeatedly scorned Bertrand Russell's failure to see the implications of his own formal language, while apparently making a comparable failure to understand the implications of his own model. Strange Loops allow - guarantee, in fact - multiple meanings via analogy and metaphors, and provide no means of adjudicating between them. They vitiate the idea of transcendental truth which Hofstadter seems suddenly so keen on. The option isn't binary at all: rather, it's a silly question.
In essence, *all* interpretations are metaphorical; even the "literal" ones. Neuroscience, with all its gluons, neurons and so on, is just one more metaphor which we might use to understand an aspect of our world. It will tell us much about the brain, but very little about consciousness, seeing as the two operate on quite different levels of abstraction.
To the extent, therefore, that Douglas Hofstadter concludes that the self is that is an illusion his is a wholly useless conclusion. As he acknowledges, "we" are doomed to "see" the world in terms of "selves"; an *a priori* sleight-of-hand, no matter how cleverly constructed, which tells us that we're wrong about that (and that we're not actually here at all!) does us no good at all.
Neurons, gluons and strange loops have their place - in many places this is a fascinating book, after all - but they won't give us any purchase on this debate.
In a technical sense, it is well-written, clear and informative. I found it much easier to read
The book is worth reading if you don't mind having your basic beliefs deeply questioned.
He brings the reader along very slowly, but inexorably to his conclusion. We are not born with self awareness. That quality evolves as infants experience more of the world and begin to form analogies and manipulate symbols. Looking at behavior at a sufficiently detailed level, he notes that "mere" physics could explain what we do if we knew enough about the starting places and velocities of all the trillions of molecules that compose our bodies, particularly our brains. However, that would be irrelevant because it would not be the level at which cognitive comprehension takes place. Rather, we understand at only at a much higher level of abstraction.
The author demonstrates that patterns can develop a "life of their own" within any substrate. He cites the example of how the fact that the number 641 is prime can explain completely why some dominoes fall or do not fall in a theoretical arrangement that acts like a computer. It takes two pages in the text to explain my previous sentence, so in the interest of brevity, I will simply cite pages 37 and 38 for a full explication. The cause of the behavior observed is much more understandable at the high level of abstraction (the primeness of the number 641) than at the level of individual dominoes (or atoms, or quarks). Yet, causation truly lies at both levels.
The author concludes that selves (or souls) ARE the complex patterns of brain activity that emerge, persist, and loop back upon themselves. Having concluded that the selves ARE the patterns, the author speculates that the selves could be reproduced to the extent that the patterns can be reproduced. Thus, to the extent the complex patterns present in human brains can be reproduced in mechanical substrates like electronic computers, the computers themselves will become conscious. He thinks of humans as persisting (to some small extent) in the memories of other humans. The weakest part of the book occurs when he speculates that his dead wife somehow continues to exist because of and to the extent that he and others can recreate the patterns of thought that once WERE her.
I liked the book for its insights into how Goedel toppled the edifice erected by Bertrand Russell and Alfred North Whitehead in their Principia Mathematica. Goedel showed how the real number system can be made isomorphic to human language, and thus any sentence can be mapped identically onto some number. He also showed that when some sentences are formulated to apply to themselves or become recursive, some of the propositions generated could not be proven within any logical system.
This is a lucidly written book that carries its premises to their extreme conclusions. Thought provoking if not completely convincing.
(JAB)
Hofstadter’s essential claim is that the Ego is a strange loop in the mind, and by strange loop he means a feedback loop (or “pattern”) that reflects on itself. Everything in our brain is a symbol, including the symbol of itself. I believe he would say that the Self-symbol is a loop, and the loop is a symbol that is continually reevaluating itself and making slight adjustments to itself. A loop that can observe itself and provide feedback on itself (it’s “self”). We invent this Self-symbol in our minds over our lifetime as it constantly accretes bits of other symbols to it—it provides feedback on itself constantly. I actually agree that this is (possibly) an accurate way to describe much of the Ego. Hofstadter agrees with Buddhism that the Self is an illusion, but he off-handedly says striving to get past the illusion as Buddhism suggests is a pointless, dead-end pursuit.
I did not find that Hofstadter compellingly demonstrates that this strange loop is the entirety of consciousness. Awareness and energy or pure presence seem to be aspects of consciousness which are outside the symbol of the Ego. He tries—but doesn’t succeed in my mind—to dispel that there is something else present. In addition, he seems to confuse our minds symbol of the “I” with what the “I” might really be. The mind is easily fooled after all so, this strange loop might certainly be an illusion. But also there might be something else we can’t sense because we are so easy to fool.
I think one of the key flaws in his argument is that he doesn’t delve deeply enough into the “self-reflexivity” he talks about. Since this “self-reflexivity” is the very point when a self-symbol examines itself then that very point may well be the point of the conscious mind. He essentially claims the self is a formula, and life is in fact mechanistic. There is no free-will because all your brain is doing is weighing pros and cons of various choices and whichever internal symbol gets the most checkmarks wins. The brain is an infinitely extensible, malleable computer processor and there is no “free” in will, only the choosing based on our brains weighing various symbols. He starts out sounding non-deterministic but in the end came out pro-deterministic. Thought=computation. In fact, he hasn’t really thought it all through. For example: can’t our brain re-evaluate a symbol’s value by thinking about it? By examining it internally, we can uncheck old boxes and check new ones. So in fact there is a consideration that occurs, a self-reflective change, an awareness that could be called “free.” It’s only action without analysis which is not free (at least within the framework he has set up.) This “will” to change is perhaps our moment of freedom.
There is something else to this self-reflective loop that Hofstadter doesn’t consider very thoroughly. Godel’s self-reflective mathematical statements are his model for what the Self is, such as “I am unprovable.” The self-reflective quality of Godel’s theories are certainly clever and very brilliant, but where they part ways with the analogy to human consciousness is our ability to change our formula and take a different direction through awareness. Someone actually wrote Godel’s formula, it didn’t burst into existence on its own. The claim that it represents the model for the self is nothing but a claim unbacked by scientific evidence.
One key outcome of Hofstadter’s analysis is that the “pattern” of the Self, or consciousness, can be distributed between people…so that a piece of his deceased wife’s consciousness exists in him because they were so intimate and her pattern lives on in him. But the flaw in this argument is so blatant, I can’t believe he doesn’t acknowledge it. If we grant him the premise that the Self is a symbol in the mind that the mind is constantly reinterpreting—then the symbol of “my dead wife” exists in his mind as a symbol of her but that symbol does not provide feedback to itself or reinterpret itself. So her consciousness is not distributed, merely a symbol of her is in his mind. The key difference being that (by his own definition) the Self is a self-reflexive symbol but my symbol of someone else—no matter how detailed it is, no matter how intimate we were—does not provide feedback to itself.
He gives us another hypothetical case to reinforce this theory. The story of a man who jumps into what is basically a Star Trek teleporter and is then reintegrated on another planet with every memory, thought, inclination, etc. Is it the same person or a new Self? What if the first person accidentally wasn’t disintegrated but survived? Which of the two would be the “real” man? He concludes that they really both are the real man and thus consciousness can be distributed. What this story lacks is an understanding of how a unique point-of-view makes the self what it is. To me the simple answer is: To other people, these two men will appear in every way the same. But to the individual who is teleported, the experience is not continuous. He simply dies in the first place and is not “reborn”. His consciousness will end and some other person identical to him in every way will be reborn, but his point-of-view of the world will be snuffed out. In the second case, the man who wasn’t disintegrated is the real consciousness while the new one is essentially an insta-clone. It’s not the complicated “grey area” puzzle Hofstadter claims. The clone may think it’s the same person as the previous one because it has the same thoughts and memories, but the man who stepped into the teleporter never had another thought. He died and was replaced by a doppelganger that was convinced it was him in every way. Hofstadter’s vision of distributed consciousness is not compelling.
Finally, in his conclusion, Hofstadter tries to bucket all people into two categories (an annoying habit he has): those who believe all things must follow physical laws (which would include those who agree with his theory), and those who believe in Dualism that would declare that there’s magic in that-there brain, a magic soul that gets squirted in at some point. The obvious flaw here is to assume that we have anywhere near a full grasp on what “physical laws” are. Does Quantum Physics “really” reflect what’s going on down there? Or is it just a metaphor for something we don’t understand at all? What about other universes or dimensions in space/time? So, perhaps there is another point to be made that maybe our “self” does follow a physical law that allows it to exist…but we just haven’t found that law yet. Or maybe physical laws are just abstractions and not so “determined” or concrete anyway. And what about the ambiguity and indeterminacy of quantum action itself? Or maybe something completely other is true that we have never even imagined.
Oh, and his weighing of “souls” by their level of consciousness is creepy. As well as his odd philosophy of how love of Bach makes you a bigger soul.
I Am a Strange Loop is overly-wordy and jammed with a few too many analogies and painful puns, but I enjoyed the intellectual challenge. He truly provides no concrete “reasons to believe” only assertions, which are worth pondering if not agreeing with.
In that book, Hofstadter's stylistic fireworks display was matched only by the
Readers who have exhausted "Themas", "Analogies" and the inter-chapter commentares in "Mind's I" will enjoy getting to spend more time wth Hofstadter, but those still dizzy from the ride of "Godel, Escher, Bach" might be better served checking out his older, more focused work.
I also softened on my views on the earlier part of the book. His over-explanation was not filler, but his insistence on making sure his ideas were truly and deeply understood by the reader, as they were crucial to not only the rest of the theory, but to him personally. I also over-explain sometimes and unfortunately have seen eyes glaze over as I go into more and more detail. "Oh Lord, please don't let me be misunderstood." After this part, the pace and the balance was a bit more palatable to me and new ideas came more frequently with explanations and analogies that were not so painful. As I reached its conclusion, not only did I feel that I deeply understood his view of consciousness, but I agreed. That was his goal after all. It also occurred to me that the audience was possibly his wife, or rather the echo of her consciousness that continued in himself.
I am subtracting half a star because of one opinion of his that I find distasteful, the idea that there is a spectrum of the "size" of souls (using his reinterpretation of the word soul that rejects dualism). I think this is a slippery slope to racism, even though that may not have been his intention. Also, his views on musical taste at the end were pretty gatekeep-y, and while I get what he was going for, I've tried to eliminate these kind of thoughts in myself because such things are so subjective. OK, some people don't "get" Bach the way you do, but maybe their understanding of Kendrick Lamar's lyrics are on a level you will never quite grok. Side note: as a computer science-y person my brain kept returning to machine learning and AI, which is touched upon abstractly but not directly. My question is, what happens when GPT-3 (or another large language model) "perceives" itself? There has to be some kind of feedback loop and recursion going on; is the result similar to the strange loop he describes? This book definitely whet my appetite for Gödel, Escher, Bach, and I can't wait to read that one and contrast it to this one.
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