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Well we don't have an understanding of how the brain works so we can't be fully sure but it's clear why they have this intuition:

1) Many people have had to cram for some exam where they didn't have time to fully understand the material. So for those parts they memorized as much as they could and got through the exam by pattern matching. But they knew there was a difference because they knew what it was like to fully understand something where that they could reason about it and play with it in their mind.

2) Crucially, if they understand the key mechanism early then they often don't need to memorize anything (the opposite of LLM's which need millions of examples)

3) LLM's display attributes of someone who has crammed for an exam and when it is probed further [1] it starts to break down in exactly the same way a crammer does.

[1] https://arxiv.org/abs/2406.02061




I understand why they intuitively think it isn't. I also think there is probably something more to reasoning. I'm just mystified by why they are so sure it isn't.




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