this post was submitted on 01 Jun 2025
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I found the aeticle in a post on the fediverse, and I can't find it anymore.

The reaserchers asked a simple mathematical question to an LLM ( like 7+4) and then could see how internally it worked by finding similar paths, but nothing like performing mathematical reasoning, even if the final answer was correct.

Then they asked the LLM to explain how it found the result, what was it's internal reasoning. The answer was detailed step by step mathematical logic, like a human explaining how to perform an addition.

This showed 2 things:

  • LLM don't "know" how they work

  • the second answer was a rephrasing of original text used for training that explain how math works, so LLM just used that as an explanation

I think it was a very interesting an meaningful analysis

Can anyone help me find this?

EDIT: thanks to @theunknownmuncher @lemmy.world https://www.anthropic.com/research/tracing-thoughts-language-model its this one

EDIT2: I'm aware LLM dont "know" anything and don't reason, and it's exactly why I wanted to find the article. Some more details here: https://feddit.it/post/18191686/13815095

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[โ€“] lgsp@feddit.it 15 points 6 days ago (1 children)

Even if LLM "neurons" and their interconnections are modeled to the biological ones, LLMs aren't modeled on human brain, where a lot is not understood.

The first thing is that how the neurons are organized is completely different. Think about the cortex and the transformer.

Second is the learning process. Nowhere close.

The fact explained in the article about how we do math, through logical steps while LLMs use resemblance is a small but meaningful example. And it also shows that you can see how LLMs work, it's just very difficult

I agree, but I'm not sure it matters when it comes to the big questions, like "what separates us from the LLMs?" Answering that basically amounts to answering "what does it mean to be human?", which has been stumping philosophers for millennia.

It's true that artificial neurons are significant different than biological ones, but are biological neurons what make us human? I'd argue no. Animals have neurons, so are they human? Also, if we ever did create a brain simulation that perfectly replicated someone's brain down to the cellular level, and that simulation behaved exactly like the original, I would characterize that as a human.

It's also true LLMs can't learn, but there are plenty of people with anterograde amnesia that can't either.

This feels similar to the debates about what separates us from other animal species. It used to be thought that humans were qualitatively different than other species by virtue of our use of tools, language, and culture. Then it was discovered that plenty of other animals use tools, have language, and something resembling a culture. These discoveries were ridiculed by many throughout the 20th century, even by scientists, because they wanted to keep believing humans are special in some qualitative way. I see the same thing happening with LLMs.