You are reading a metablog post, dated July 22, 2016.

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## Comments

## Thanks, had some enjoyable

Thanks, had some enjoyable time solving them. I think the defining feature of these puzzles is that you cannot be totally sure that you have solved them! Disagreements about what constitutes a solution are entirely possible (just like for an ethical problem for example). I am not even sure how to prove that a solution like "objects that are exactly like the ones on the left go to the left and all others go to the right" is bogus. So yes, seems like a pretty good example of what you call "nebulosity".

## how to prove that a solution

One way to do it would be to reformulate the puzzle more rigorously: suppose Alice supplies Bob with a sequence of objects and then tells him on which side the objects go (one by one). Bob's task is to find the algorithm with a minimal length that decides the side of the objects revealed so far. Intuituvely all fun-spoiling algorithms will have a length proportional to the length of the sequence revealed so far and the minimal length of the algorithm will converge towards some constant value. Algorithm that achieves this value is the true answer to the puzzle. At this point the problem looks suspiciously like calculating Kolmogorov-Chaitin complexity.

## The One True Rule

Yes, given six instances, or any finite number of instance, there will always be multiple valid rules. (This is the general Problem of Induction.)

However, it's a principle of the construction of Bongard problems that one rule should be obviously better than any alternatives. Also, "is one of these six things" is explicitly considered an invalid rule. I didn't include all such details, because the general form of the problems is meant to be intuitive by induction from the easy examples :-)

As far as I know, no one has ever tried to prove that the intended solution is best (according to a minimum-program-length criterion, or any other).

However, I'd be moderately surprised if anyone could come up with a plausible alternative rule for any of standard problems.

## Analogies all the way down

Have you dived into the rest of Hoftstader's later work (like Fluid Concepts and Creative Analogies) and that of his students? He's been chasing analogy-making as the master key to AI for decades; always sounded promising but I don't have a great sense of how much progress has been made.

## Later work

I did read his Copycat stuff when he did a sabbatical year at MIT-AI, and I think read at least abstracts of subsequent work until I left the field. I found it unimpressive. I think he's a very good philosopher and an astonishing writer, but not so great as a hacker. And you do have to be a great hacker to actually do AI.

I only learned of Fluid Concepts and Creative Analogies when researching this post. Weird factoid: a copy of it was the very first thing ever sold by Amazon.

Doing a bit of casual looking-around, it seemed that Foundalis' thesis is the best (and pretty much last) thing to have come out of his lab.

## Warning: comment contains Bongard solution spoilers...

These Bongard problems are fascinating, and have been fun to solve! I'll have to follow up your links - it would be interesting to me to know a little more about how people go about doing this. I haven't seen them before and from my experience at trying the ones you show here, the Feynman-style 'bag of tricks' idea you mention in How To Think Real Good is very relevant - they are much easier if you have the right cached tool.

I found the stability one very easy, and the one with the three dots didn't take long either. For both of them I have a good cached tool - from my physics-maths background I'm used to projecting stuff against the axes, or seeing if something is stable against a small perturbation. Those ideas obviously appear somewhere in my 'list of things to try', and something about the situation prompted me to try them. (For the stability one it was a very rapid thought, connecting that 'broken chair' with the idea of instability; I'm not so sure what it was about the dots that prompted the connection.)

On the other hand, the circle-midpoint one took me

ages. After lots of false starts I had some success from just sort of eyeballing the whole lot for a while, and noticing that some of the pictures on the left were kind of neater than the similar ones on the right. And then eventually I connected that vague judgment with the midpoint thing. I don't think there's anything in my personal box of tools that's relevant to that situation!I wrote about having a similar experience with the Cognitive Reflection Test.

## Newbigin, Polanyi, & intuition in the scientific process

20th century Hungarian scientist Michael Polanyi wrote about the role intuition plays in formulating scientific hypotheses.

Lesslie Newbigin's very readable little book on epistemology, Proper Confidence (1995) paraphrases Polayni's work The Tacit Dimension (1966):

"Obviously, there are no rules for making new discoveries. Discovery means learning something new which was not known before. It involves a venture beyond what is known. How does it come about that discoveries in science are made?..."

"Advances in scientific knowledge are made by recognizing a problem and seeking a solution. It may be a problem which no one has recognized before. But what exactly is a problem? Is it something known or something unknown? If it is known, why is there a problem? If it is unknown, how would we recognize a solution when we found it? The answer that Polayni proposes to this old conundrum is as follows: Recognition of a problem is an awareness, an intuition, that there is something - a pattern or a harmony waiting to be found - hidden in the apparent haphazardness of empirical reality.

"This cannot be more than an intuition. And it may prove to have been an illusion. There have been scientists who have spent years seeking solutions to problems which were illusory. One might refer to the centuries of effort devoted to the discovery of perpetual motion or of the 'philosopher's stone,' but there are plenty of modern examples. Scientific discovery involves such gifts as intuition, imagination to project possible patterns, prudence coupled with a willingness to take risks, and courage and patience in pursuing a long and arduous course of investigation. At every point along this course, there is need of personal judgment in deciding whether a pattern is significant or merely random. None of these things can be coverd by formal rules. They all involve the personal commitment of the scientist."

And, regarding "mushy" things like the not-technically triangles vs. circles Bongard problem, where we rely on a "fluidity of descriptions" when modeling:

"Polanyi points out that knowing is always part of a tradition. The mental activity involved in trying to make reliable contact with reality can function only by indwelling a tradition of language, concepts, models, images, and assumptions of many kinds which funtion as the lenses through which we try to find out what is really there.

"The critical movement initiated by Descartes sought to subject all tradition to question and to build a structure of knowledge which would be accredited by pure unaided reason, having the precision and the certainty of mathematics... No one can deny the acheivements of the critical period. But it was a mistake to suppose that the enterprise of knowing the reality of which we are a part can begin, so to speak, with an empty page."

## Zendo

The game Zendo, which uses Icehouse Pieces, is basically Bongard problems. Lots of fun for 2+ players!

## Tacit Knowledge

Thank you!

I read The Tacit Dimension decades ago, and I agree: it's very good, and relevant. I should probably go back and read it again sometime.

## Footnote 15 [Spoiler]

I came up with a different solution than the footnote:

"Objects where the width of the base is at least that of the entire object"

Is this equivalent to the gravity solution? I think not. Why?

1) With the possible exception of the Meta-Bongard (of which Foundalis himself says on his homepage, that it does not strictly follow the rules) all the problems presented are about the geometry of the objects. Maybe I lack some fundamental insight in physics, but gravity is not a geometric property?!

2) In my understanding, once you go down the rabbit hole of allowing high-level arguments such as physics, you have to account for distribution of mass. It is obviously perfectly possible to habe P-shaped objects that do stand upright (I'm looking at a desk lamp right now as prrof-of-concept) and within the rules of the game I see no a priori reason why equal distribution of mass should be assumed. I also do not think that Occam can solve this for us. For sure gravity is a more complex model than width, and if I took more words to describe my solution based on width that is only because the word "gravity" implies so much more which is kind of my point.

I would have made this comment anyways because I'm just that much of a nitpicker. However, in the light of David: "I'd be moderately surprised if anyone could come up with a plausible alternative rule for any of standard problems." [Is this a standard problem?] and Ik: "broken chair" [But this is not how you are supposed to look at these things?!] I find my observation even more intersting.

I do realize that the notion that there actually

arerules to follow when constructing a Bongard-Problem (cf. http://www.foundalis.com/res/invalBP.html) is a very Stage 4 one. But I do not think that this is me "just not getting it". Rather I am not convinced by the proposition that Bongard-Problems might be human-complete in the sense that every human solvable problem can be turned into a Bongard-Problem (presumably in polynomial time?). My impression is that the human mind is able to solve Bongard-Problems only because they are a somehow defined class of problems and we have meta-knowledge on how that class of problems work. This is not that far from the Sudoku-example in my opinion. The same is true for standardized intelligence tests. Once you are really serious about allowing for any solution without meta-rules, they break together. This can be trivially seen in the verbal branches which would not survive an encounter with the later Wittgenstein.## Footnote 15 [Spoiler]

Thanks! Yes, I'm moderately surprised :-)

It's easily "fixable" (a trapezoid with a base not much smaller than top would be stable), but probably that's not really relevant to your point here, which is about whether Bongard problems are human-complete.

That question is somewhat ill-defined because the "class of Bongard problems" is also ill-defined (the page by Foundalis notwithstanding). I gather that Bongard himself was vague about this (but haven't read his book). Various authors have extended the set in various directions, and there's no Rules Committee to say which are valid.

If we did restrict them to ones that are "strictly geometrical," it's much more plausible that one could write an AI program to solve them. It would have to have a great deal of geometrical knowledge, but probably that's bounded in a way that general human knowledge isn't. Writing it could be a lot of fun! It might even be useful too; I don't know.

## Problem Choosing

Enjoyed this post and excited about 4.2... etc. Thanks!

RE: footnote 9: problem choosing. Would love to see this. I have always tried to explain to others that the first step of scientific method (have a hypothesis) is where philosophy lives, and is where much of the hard work is, to no avail. Would love to see this explained.

## DL might be able to solve these problems

Hi,

Deep learning is definitely

not'mostly brute force'. The most common definition of deep learning is exactly that of solving a Bongard-type problem - DL involves taking some data, then working backwards to construct the model ('rule' or 'program') that generates that data.## 3 types of inference

There's basically 3 types of inference - deduction (symbolic), induction (probability) and abduction (concept learning and inference-to-best-explanation).

I think it's that 3rd one (concept learning and IBE) that's still not well understood, and perhaps this is what you mean when you talk about 'meta-rationality'.

I think all 3 types of inference need to work together to get a full account of rationality.

## Abduction and deep learning

Hi Marc,

I think you are right about abduction! I actually intended to mention it, in an early version of this post, but decided to leave it out just because it was an extra complication.

It's probably best that we agree to disagree about deep learning. We could argue the technical issues, and one of us might convince the other, or not; but this doesn't seem the place for that. Anyway, ultimately, the only proof would be for someone to actually succeed. If you do that, I will be

veryimpressed!David

## Alternative method for "the dreaded metaphysics" problems

I found the second one hard and the third easy. You don't have to realise that line segments can include angles to solve the second - instead you can say the ones on the left have a vertex with three lines, and the ones on the right a vertex with five, and the number of segments is irrelevant. Then the third problem is very straightforward, because you're already thinking in terms of vertices being anywhere that a line branches, and just go back to counting segments.

This could be 'fixed' by adding a collection with two connected three-line vertices on the right (total of five lines).

## The number of lines radiating from a vertex

Yes, interestingly, I solved the second one by counting the number of lines radiating from a vertex too. (Apparently this is not the "usual" way.) I still didn't find the third one easy. I'm not very good at puzzles, really!

Arguably the lines vs vertices formulations of the solution to the second one supports

Alex's suggestion above that some of these have more than one correct solution. In this case, the two alternatives might be considered "the same rule, expressed different ways," but that runs into the nebulosity of what "same" and "different" mean!## Lines radiating from a vertex

That's how I solved it too. I found the third one a bit harder, but not terribly much so, though I did initially fall into the 'trap' set by the previous ones.

One of the problems ("Initially, you probably see a variety of shapes, each with a tiny blob attached. ") I solved without looking at the objects on the right. I quickly saw the common factor, and just had to look at the other side to confirm it.

I guess some Bongard problems have better-determined solutions than others.

## "Church-Turing Thesis" and "Human-Complete problems"

The statement you are citing: „We know humans can’t do anything more than a computer can“ is just a hypothesis, and I think it is simply wrong. This is the (often implicit) presupposition of AI that is the reason for its failure.

In mathematics, mathematical objects are known for which there is no complete formal description. For example, the set of computable total functions is not enumerable (as can be shown with a rather simple diagonalization proof). So any formal system producing the algorithms producing such functions is incomplete. This can be interpreted in such a way that any formal system can only produce a limited range of patterns.

However, you can always produce another algorithm (or formalism, or systematic piece of knowledge) not covered by your previous system. The current system can always be extended. The process of this extension is not some mysterious woo thing but can be described even by a computable function (the term “productive function” has been coined here). If you try to build this extension mechanism into the formal system itself, the result is again a limited formal system, not a general intelligent system. But it looks like humans have no problem to do this. So the Church-Turing-Thesis only applies to formal systems. Humans are physical systems and it looks like we are not describable completely in terms of a single formal theory. While any process going on in our cognition might be described formally in hindsight, it is not possible to create a single formal theory describing them all.

What is missing from formal systems is a complete reference to themselves. You can apply the productive function from the outside and get a new, more powerful or different formal system, but if you build this external reference into the formal theory, you get a new formal system whose external point of reference has shifted elsewhere. Formal systems cannot refer to themselves in their totality. Humans seem able to do this or at least to always generate an external (meta-)viewpoint to any piece of formal knowledge they are using. The result is that we are historically or biographically developing in physical time. Formal systems cannot do that. Anything that is derivable inside a formalism is derivable right from the beginning. A formal system cannot describe its own historical evolution, but human cognition is evolving.

A result of this is that there is no complete formal system describing human cognition. This also means that every knowledge is special. Therefore, the concept of a “human-complete problem” is, in my view, nonsensical. There is no single problem so that knowing how to solve this problem would give you the means of solving every problem humans can solve. If such a problem (and the knowledge for its solution) would exists, this would mean that there would be a complete formal theory (a complete description in terms of a finite amount of knowledge) of how human cognition is working. But this does not exist. Instead, human cognition develops special knowledge for each special type of problem. There is no architecture for general intelligence. Cognition develops historically and the total process cannot be described in terms of any single algorithm or formalism. For any theory of human cognition, there is the possibility of a process that moves it out of the scope of that theory. You can think of this as applying a productive function to the formal theory describing the current stage of development.

As long as AI and “Cognitive Science” continue looking for the generally intelligent algorithm or formalism, nothing will come out of it. Since cognition is developing historically, there are no fixed laws of thought, so there cannot even be a “cognitive science” in the strict sense of the term “science”. Instead, cognitive psychology should be viewed as a historical discipline, belonging into the humanities. This does not mean that there is any woo factor here, just that exact descriptions are only possible in hindsight, by extending the formal theories used to describe thought processes. There is no woo factor involved in the application of a productive function to a formalism describing an enumerable subset of a non-enumerable productive set, you just apply that function and get a new element and an extended formalism. You can always do this although there is no complete formal description to this.

So it looks like the basic assumption of scientism that it is possible to describe all of reality in a single formalism is wrong. You always need a multitude of systems and you have to switch between them and generate new ones. It is not possible to unify all of them into a single system without leaving gaps. The incompleteness will come in the form of gaps or in the form of vagueness (which means using concepts with incomplete definitions that might have to be extended, i.e. here the gaps are in the language used). Every formalism contains a finite amount of information and can only describe a finite range of patterns or regularity.

So I think what you describe by the terms “patterned” and “nebulous” is a necessary result of this limitedness of all formal systems.

## The "equidistant points"

The "equidistant points" still doesn't seem true to me. (I actually tried to check and thought the fourth right one disproved it.)

I intend to buy TTAoLaB.

The "circle next to concavity" seems to me easier than you want it, with the second left and first right side by side - I saw those at a glance, checked one more, then checked all for "if the concavity were upward, the circle would be to its left/right".

I got the meta-problem right in everything except the problem with Greek letters, which I couldn't solve thus far ...

From a sample of one: the mushy problem looked persuasive for someone having the "this is normal rationality" reaction ...

So, thanks!

## 27 modes of reasoning are enough for AGI

Andreas,

The Godel limitations apply only to

formal( deductive) reasoning. Computers can easily escape these limitations by supplementing deductive reasoning with inductive and abductive reasoning, which are based on the use of empirical data. For example, our ability to 'see' the truth of Godel statements actually relies on the empirical fact that we've never in practice found any inconsistencies in the basic system of arithmetic we use - adding this extra empirical fact lets us escape Godel at the cost of a slight degree of uncertainty. And computers can do the same.I do agree that there is not likely to be one unified algorithm that can capture general intelligence- indeed the very essence of intelligence is exactly what you say - it's the ability to switch between different modes of explanation .

However, there is no reason why a small finite number of different algorithms working together can't do the job. Not

perfectlyof course, but if you have different algorithms working together, each of which can give you apartialcoverage of cognition in general, the idea is that all the different methods can complement each other and cover for each others weaknesses, such that the whole system can still be a very goodapproximationto cognition in general.I have my own theory of AGI and it says that you only need a total of 27 different types of algorithms (based on reasoning systems for 27 'core knowledge domains') to do the job.

## Mushy problems [contains spoilers]

Oh, great, I'm glad to hear that!

I'm not sure how you are counting, but either way the points are equally spaced along the vertical axis. They aren't equidistant in the plane.

(Or, they are close to equidistant; these are scans of hand-drawn diagrams, so the distances are not precise. That's part of the "mushiness" of the whole thing. The pictures aren't meant to be imprecise representations of the problem; they

arethe problem. Generally, the "triangles" aren't quite triangular, there are tiny gaps in "lines," and so on.)What does "TTAoLaB" stand for?

Yeah, I was stuck on that one for a long time, too. The ones on the left have four "bare endpoints"; the ones on the right have two.

## TTAoLaB = The Thrilling

TTAoLaB = The Thrilling Adventures of Lovelace and Babbage. Thanks.

## Thrilling Adventures

Oh! Yes, that's a wonderful book! Sidney Padua, the author, did a huge amount of historical research, and turned up some fascinating discoveries. The comic is funny and charming, but also teaches a surprising amount of computer science as well as history. Miraculous!

## Map of knowledge - the 27 core knowledge domains

Here are my '27 core knowledge domains' that represent all knowledge. I use the archaic letters of the Greek alphabet to symbolize each domain. I believe that any AGI system must have a modelling system for each of these 27 domains, and all of these together are sufficient.

The left-hand column is the mathematical domains. The middle column is the physics domains. And the right-hand column is the teleological (mental) domains. The domains are ordered in terms of decreasing abstraction, along two different dimensions. Left-to-right (most abstract to least abstract) and top-to-bottom (most abstract to least abstract). The positions of the symbols on the page are intended to provide clues as to the relationships between the knowledge domains.

The beginning of infinity awaits....

http://www.zarzuelazen.com/CoreKnowledgeDomains2.html

## Church-Turing thesis

Dr. Kurt Ammon has just published his new paper here: http://arxiv.org/abs/1608.04672. I regard it as highly relevant with respect to the discussion on the Church-Turing thesis that was going on here. Kurt Ammon is a mathematician working on topics related to this problem. Se also https://creativisticphilosophy.wordpress.com/2016/08/20/kurt-ammon-infor... for further information on Kurt Ammon's previous publications.

## Comment

Andreas, thank you for this!

Sorry you had trouble posting your comment. The spam filter wasn't sure about it, so it decided I had to approve it manually.

## Great read. Thank you. Question...

So it sounds like the point we're about to broach here is the harmony between the relationship of perception and this nebulous, ever changing haze that is reality, full of patterns.

One point you made was really responsible for this thought/question, and that was the fact that reality doesn't impose the bounds necessary to comprehend it or chop up the information being percieved by us into something comprehensible. We do that.

My question is: Could intelligence be solely dependent on biological mechanisms, or the harmonious interplay between two extremely complex systems? With the biological (genetic, coded, whatever) mechanisms of an object, and perhaps even the very substance of an object being informed by the environment (reality), thus attuning the objects capacity to parse reality within the creation of implicit bounds being created as the systems "play" and interact with each other.

This is a tough thought to get out right now for some reason. Basically I'm trying to hash out whether a constantly self-modifying program (meta-programming) utilizing an array of sensors that detect various aspects of reality to create an analog of the nebulousness of reality (a long way of saying introduce environmental randomness), interacting with another similar program or community of similar programs could, with a basic set of initial conditions eventually develop stronger AI?

I think we get so hung up on storage/memory requirements, processing power, exponential growth and so on that evolving the state of an object, and reducing the operations using simple logic like "the only thing that matters is the previous state of the object, the current state, and the future state based on the current and preceding stimulus" is largely left unexplored.

Brains naturally prune unused connections. In the same way, the more an object can self-modify it's state and heuristics by learning from the inputs, outputs, and by being governed using some basic system imposed by the programmer, other objects or environment, the faster the outputs would be determined because incorrect answers or undesirable outcomes should be used less and less.

I'd never heard of most of the things you discussed before now, so please excuse the poorly worded comment/question. I simply have a passion for AI and had to ask myself what the hell was happening inside me to make answering those puzzles so damn easy for me. FWIW I couldn't figure it out. Yet. ;)

Peace

## Read as philosophy, this is mind blowing stuff - thank you

Thanks for curating and presenting this. I have been exploring, as a practitioner with a slight romantic yen for academia, 'systems thinking' for some time. In that universe, like Terry Pritchett tree frog, the moment you think you have got it sussed, you see a new ring of leaf-edges on the horizon. This has now opened up huge horizons for me, and as a meta model for meta cognition, explaining for example why consultants shouldn't codify method (and, perhaps, why method /can't/ be codified). As a teaching tool I think it could be one of the best.

It was fun and slightly punctured my bubble to read some of the comments, with the technical discussions over the rule base for the game and the possibilities of human-created non-human 'intelligence'. I think, though worthy and meaningful, they miss the point. The point, for me, is that the rules are contestable. This post is like the inflection point between the early Wittgenstein ('the world is everything that is the case' and the bit about the ladder we climb and pull up after ourselves, and 'whereof we cannot speak, thereof we must pass over in silence - the logical absolutist sucked into dualism by the mystical) and latter Wittgenstein - word games and language acts (basically a meaningful reassertion of 'it's tortoises all the way down). Cool.

## Philosophy & management consulting

Thank you, glad you liked it! I expect to write much more about meta-systematic cognition in coming months. If you haven't already seen it, this post is an abstract overview, and most of the other recent posts in the metablog are also relevant.

I didn't mention in this post that I am drawing heavily on Robert Kegan's adult developmental theory, which makes meta-systematicity "stage 5" of cognitive development.

Kegan was an academic experimental psychologist at Harvard, but for the past 20 years seems to have put most of his energy into management consulting for executive development. I know little about that work (although I intend to learn more soon). You might want to look into it.

Right. This is a key to "stage 5" in Kegan's scheme. Everything in reality is both nebulous (vague, ambiguous, constantly-changing) and patterned. Systems and methods rely on patterns, and tend to break down in the face of nebulosity. Skill in working with nebulosity is meta-systematic "fluidity."

Right, exactly. Wittgenstein was one of the first people to begin to understand these issues (in Philosophical Investigations). Heidegger did so also, a bit earlier, and perhaps in greater depth, although considerably less clearly.

## I watched the Brian Cantwell

I watched the Brian Cantwell Smith talk and was curious for more. Tracked down this intro for an upcoming book of his -- https://web.archive.org/web/20140311060517/http://www.ageofsignificance....

Looks good, more detailed than his talk

## BCS upcoming

Yes... that book (with various titles) has been upcoming since about 1987, unfortunately. He's famous for writer's block. It's frustrating; he has a depth of understanding that's pretty well unmatched, but most of it will probably never appear in public.

## The Age of Significance

That preface is excellent, though, and I would recommend it to anyone who is interested!

Writing grand prolegomenas to books that never come into being—because they are too gigantic to actually write—is, of course, a fault I share with him. However, the decision to put my books in web-only form has resulted in releasing little bits, which are maybe better than nothing more than the prefaces.

## There's a quite good YouTube

There's a quite good YouTube channel about math explained from a stage 5 point of view, it is 3Blue1Brown.

Anyone who likes recreative math or understanding it should take a look, the content is worth gold.

## Fleas in the Jar

[Benjamin Taylor left the interesting comment below, but unfortunately the spam filter mistakenly rejected it. I'm reposting it at his request.]I commented on this 'flea jar' paradigm post from What's the Pont:

https://whatsthepont.com/2017/01/29/the-fleas-in-the-jar-experiment-who-...

There’s something in here about the (in)ability to switch contexts. Inter-contextuality, meta-contextuality, whatever it is or whatever you call it is how we get creative in the first place – but somehow we seem programmed to (quite often intentionally) limit ourselves to a single context really easily.

If you put your post here together with the excellent post at Meaningness:

https://meaningness.com/metablog/bongard-meta-rationality

(which, for me, shows why any method/toolset/worldview is necessarily limited in a world with infinite potential rulesets), I think you get something interesting.

Systems/cybernetics/complexity teaches multiple contextual views but seems to do so only at ‘peak moments’ – before subsiding back into restricted contextuality as it is ‘applied’ to ‘specialisms’.

This begs questions I don’t have time to explore here, but Bongard games are the best example for me of how you can teach this point – perhaps experientially – and which might have wider application.

## enjoyed this

enjoyed this

## Add new comment