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Claude is good at assembling blocks, but still falls apart at creating them

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Re: Claude is good at assembling blocks, but still falls apart at creating them

#111
post #16
post #8

LLMs are just really good search. Ask it to create something and it's searching within the pretrained weights. Ask it to find something and it's semantically searching within your codebase. Ask it to modify something and it will do both. Once you understand its just search, you can get really good results.

better mental model: it's a lossy compression of human knowledge that can decompress and recombine in novel (sometimes useful, sometimes sloppy) ways. classical search simply retrieves, llms can synthesize as well.

Corporate wants you to find the difference...

Point being, in broad enough scope, search and compression and learning are the same thing. Learning can be phrased as efficient compression of input knowledge. Compression can be phrased as search through space of possible representation structures. And search through space of possible X for x such that F(x) is minimized, is a way to represent any optimization problem.

Re: Claude is good at assembling blocks, but still falls apart at creating them

#112
post #97

I've yet to be convinced by any article, including this one, that attempts to draw boxes around what coding agents are and aren't good at in a way that is robust on a 6 to 12 month horizon. I agree that the examples listed here are relatable, and I've seen similar in my uses of various coding harnesses, including, to some degree, ones driven by opus 4.5. But my general experience with using LLMs for development over…

LLMs are bad at creating abstraction boundaries since inception. People have been calling it out since inception. (Heck, even I got a twitter post somewhere >12 months old calling that out, and I'm not exactly a leading light of the effort) It is in no way size-related. The technology cannot create new concepts/abstractions, and so fails at abstraction. Reliably.

> The technology cannot create new concepts/abstractions, and so fails at abstraction. Reliably.

That statement is way too strong, as it implies either that humans cannot create new concepts/abstractions, or that magic exists.

Re: Claude is good at assembling blocks, but still falls apart at creating them

#113
post #8

LLMs are just really good search. Ask it to create something and it's searching within the pretrained weights. Ask it to find something and it's semantically searching within your codebase. Ask it to modify something and it will do both. Once you understand its just search, you can get really good results.

  > Once you understand its just search, you can get really good results.
I think this is understating the issue, ignoring context. It reminds me of how easy people claim searching is with search engines. But there's so many variables that can make results change dramatically. Just like Google search, two people can type in the exact same query and get very different results. But probably the bigger difference is in what people are searching for.

What's problematic with these types of claims is that they just come off as calling anyone who thinks differently dumb. It's as disconnected as saying "It's intuitive" in one breath and "You're holding it wrong" in another. It's a bad mindset to be in as an engineer because someone presents a problem and instead of trying to address it is dismissed. If someone is holding it wrong, it probably isn't intuitive[0]. Even if they can't explain the problem correctly, they are telling you a problem exists[1]. That's like 80% of the job of an engineer: figuring out what the actual problem is.

As maybe an illustrative example people joke that a lot of programming is "copy pasting from stack overflow". We all know the memes. There's definitely times where I've found this to be a close approximation to writing an acceptable program. But there's many other times where I've found that to be far from possible. There's definitely a strong correlation to what type of programming I'm doing, as in what kind of program I'm writing. Honestly, I find this categorical distinction not being discussed enough with things like LLMs. Yet, we should expect there to be a major difference. Frankly, there are just different amounts of information on different topics. Just like how LLMs seem to be better with more common languages like Python than less common languages (and also worse at just more complicated languages like C or Rust).

[0] You cannot make something that's intuitive to all people. But you can make it intuitive for most people. We're going to ignore the former case because the size should be very small. If 10% of your users are "holding it wrong" then the answer is not "10% of your users are absolute morons" it is "your product is not as intuitive as you think." If 0.1% of your users are "holding it wrong" then well... they might be absolute morons.

[1] I think I'm not alone in being frustrated with the LLM discourse as it often feels like people trying to gaslight me into believing the problems I experience do not exist. Why is it so surprising that people have vastly differing experiences? *How can we even go about solving problems if we're unwilling to acknowledge their existence?*

Re: Claude is good at assembling blocks, but still falls apart at creating them

#114
I have several projects that counter this article. Not sure why, but I’ve extracted clean, readable, well-constructed, and well-tested code.

I might write something up at some point, but I can share this:

https://github.com/chicagodave/devarch/

New repo with guides for how I use Claude Code.

Re: Claude is good at assembling blocks, but still falls apart at creating them

#115
post #16

Earlier quoted context omitted.

better mental model: it's a lossy compression of human knowledge that can decompress and recombine in novel (sometimes useful, sometimes sloppy) ways. classical search simply retrieves, llms can synthesize as well.

“Novel” to the person who has not consumed the training data. Otherwise, just training data combined in highly probable ways. Not quite autocomplete but not intelligence either.

Are you reviewer 2?

Joking aside, I think you have too strict of a definition of novel. Unfortunately "novel" is a pretty vague word and is definitely not a binary one.

ALL models can produce "novel" data. I don't just mean ML (AI) models, but any mathematical model. The point of models is to make predictions about results that aren't in the training data. Doing interpolation between two datapoints does produce "novel" things. Thinking about the parent's comment, is "a blue tiger" novel? Probably? Are there any blue tigers in the training data? (there definitely is now thanks to K-Pop Demon Hunters) If not, then producing that fits the definition of novel. BUT I also agree that that result is not that novel. It is entirely unimpressive.

I'm saying this not because I disagree with what I believe you intend to say but because I think a major problem with these types of conversations is that many people are going to interpret you more literally and dismiss you because "it clearly produces novel things." It isn't just things being novel to the user, though that is also incredibly common and quite telling that people make such claims without also checking Google...

Speaking of that, I'm just going to leave this here... I'm still surprised this is a real and serious presentation... https://www.youtube.com/watch?v=E3Yo7PULlPs&t=616s

Re: Claude is good at assembling blocks, but still falls apart at creating them

#116

Earlier quoted context omitted.

It is fundamentally and provably different than search because it captures things on two dimensions that can be used combinatorially to infer desired behavior for unobserved examples. 1. Conceptual Distillation - Proven by research work that we can find weights that capture/influence outputs that align with higher level concepts. 2. Conceptual Relations - The internal relationships capture how these concepts are rela…

Aren't the conceptual relations you describe still, at their core, just search (even if that's extremely reductive)? We know models can interpolate well, but it's still the same probabilistic pattern matching. They identify conceptual relationships based on associations seen in vast training data. It's my understanding that models are still not at all good at extrapolation, handling data "way outside" of their traini…

I don't know honestly, I think really the only big hole the current models have is if you have tokens that never get exposed enough to have a good learned embedding value. Those can blow the system out of the water because they cause activation problems in the low layers.

Other than that the model should be able to learn in context for most things based on the component concepts. Similar to how you learn in context.

There aren't a lot of limits in my experience. Rarely you'll hit patterns that are too powerful where it is hard for context to alter behavior, but those are pretty rare.

The models can mix and match concepts quite deeply. Certainly, if it is a completely novel concept that can't be described by a union or subtraction between similar concepts, than the model probably wouldn't handle it. In practice, a completely isolated concept is pretty rare.

Re: Claude is good at assembling blocks, but still falls apart at creating them

#117

Earlier quoted context omitted.

> I push them to their limits and have definitely witnessed novel output. I’m quite curious what these novel outputs are. I imagine the entire world would like to know of an LLM producing completely, never-before-created outputs which no human has ever thought before. Here is where I get completely hung up. Take 2+2. An LLM has never had 2 groups of two items and reached the enlightenment of 2+2=4 It only knows that…

This is not a correct approximation of what happens inside an LLM. They form probabilistic logical circuits which approximate the world they have learned through training. They are not simply recalling stored facts. They are exploiting organically-produced circuitry, walking a manifold, which leads to the ability to predict the next state in a staggering variety of contexts. As an example: https://arxiv.org/abs/2301.…

So you do agree that an LLM cannot derive math from first principals, or no? If an LLM had only ever seen 1+1=2 and that was the only math they were ever exposed to, along with the numbers 0-10, could an LLM figure out that 2+2=4?

I argue absolutely not. That would be a fascinating experiment.

Hell, train it on every 2-number addition combination of m+n where m and n can be any number between 1-100 (or 0-100 would be better) BUT 2, and have it figure out what 2+2 is.

I would probably change my opinion about “circuits”, which by the way really stretches the idea of a circuit. The “circuit” is just the statistically most likely series of tokens that you’re drawing pretend lines between. Sure, technically connect-the-dots is a circuit, but not in the way you’re implying, or that paper.

Re: Claude is good at assembling blocks, but still falls apart at creating them

#118
post #97

Earlier quoted context omitted.

LLMs are bad at creating abstraction boundaries since inception. People have been calling it out since inception. (Heck, even I got a twitter post somewhere >12 months old calling that out, and I'm not exactly a leading light of the effort) It is in no way size-related. The technology cannot create new concepts/abstractions, and so fails at abstraction. Reliably.

> The technology cannot create new concepts/abstractions, and so fails at abstraction. Reliably. That statement is way too strong, as it implies either that humans cannot create new concepts/abstractions, or that magic exists.

I think both your statement and their statement are too strong. There is no reason to think LLMs can do everything a human can do, which seems to be your implication. On the other hand, the technology is still improving, so maybe it’ll get there.

Re: Claude is good at assembling blocks, but still falls apart at creating them

#119
post #103

Earlier quoted context omitted.

I believe his argument is that now that you've defined the limitation, it's a ceiling that will likely be cracked in the relatively near future.

Well, hallucinations have been identified as an issue since the inception of LLMs, so this doesn’t appear true.

Hallucinations are more or less a solved problem for me ever since I made a simple harness to have Codex/Claude check its work by using static typechecking.

Re: Claude is good at assembling blocks, but still falls apart at creating them

#120
post #97

Earlier quoted context omitted.

LLMs are bad at creating abstraction boundaries since inception. People have been calling it out since inception. (Heck, even I got a twitter post somewhere >12 months old calling that out, and I'm not exactly a leading light of the effort) It is in no way size-related. The technology cannot create new concepts/abstractions, and so fails at abstraction. Reliably.

> The technology cannot create new concepts/abstractions, and so fails at abstraction. Reliably. That statement is way too strong, as it implies either that humans cannot create new concepts/abstractions, or that magic exists.

That’s a straw man argument if I’ve ever seen one. He was talking about technology. Not humans.
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