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Comment by sigmoid10 | Hacker News Reader

>Every day has 86400 seconds during which a human brain constantly adapts to and learns from external

That's not even remotely true. At least not in the sense that it is for context in transformer models. Or can you tell me all the visual and auditory inputs you experienced yesterday at the 45232nd second? You only learn permanently and effectively from particular stimulation coupled with surprise. That has a sample rate which is orders of magnitude lower. And it's exactly the kind of sampling that can be replicated with a run-of-the-mill persistent memory system for an LLM. I would wager that you could fit most people's core experiences and memories that they can randomly access at any moment into a 1000 page book - something that fits well into state of the art context windows. For deeper more detailed things you can always fall back to another system.

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Your definition of "learning" is incomplete because you're applying LLM concepts to how human brains work. An LLM only "learns" during training. From that point forward all it has is its context and vector DBs. If an LLM and vector DB is not actively interacted with, nothing happens to it. However for the brain, experiencing IS learning. And the brain NEVER stops experiencing.

Just because I don't remember my experiences at second 45232 on May 22, doesn't mean that my brain was not actively adapting to my experiences at that moment. The brain does a lot more learning than just what is conscious. And then when I went to sleep the brain continued pruning and organizing my unconscious learning for the day.

Seeing if someone can go from token to freeform physical usefulness will be interesting. I'm of the belief that LLMs are too verbose and energy intensive to go from language regurgitation machines to moving in the real world according to free form prompting. It may be accomplishable with the vast amount of hype investment, but I think the energy requirements and latency will make an LLM-based approach economically infeasible.

> I'm of the belief that LLMs are too verbose and energy intensive to go from language regurgitation machines to moving in the real world according to free form prompting.

This is not just possible, it is already happening. It just gets drowned in the media noise about chatbots. Look at some current research in this area (e.g. by Nvidia last year).

> You only learn permanently and effectively from particular stimulation coupled with surprise.

This is just, not true. A single 2min conversation with emotional or intellectual resonance can significantly alter a human’s thought process for years. There are some topics where every time they come up directly or analogously I can recall something a teacher told me in high school that “stuck” with me for whatever reason. And it isn’t even a “core” experience, just something that instantly clicked for my brain and altered my problem solving. At the time, there’s no heuristic that could predict how or why that particular interaction should have that kind of staying power.

Not to mention, experiences that subtly alter thinking or behavior just by virtue of providing some baseline familiarity instead of blank slate problem solving or routine. Like how you subtly adjust how you interact with coworkers based on the culture of your current company over time vs the last without any “flash” of insight required.

But that resonance is a form of surprise. You are just using different words for the same context. At the same time: You are correct in the sense, that this "surprise" is completely ignored by today's LLMs. They only use this in training mode and not for continuous learning. Whether one can find a sufficiently useful definition of "surprise" to use auxiliary "learning systems" (vector DBs or system prompts) has yet to be shown

You are just rephrasing things without using terms commonly used in research. I used "surprise" because it is a) true (if not complete) and b) easy to understand for people outside of the field. The correct term you are looking for is "arousal" (not necessarily sexual). There is tons of research on the fact that arousal enhances memory formation that would otherwise need many, many repetitions. But it also inhibits memorisation of nearby events. So you either need a very particular emotional state to remember a specific thing or massive repetitions to remember many new things. There's no way to cheat the sample inefficiency of your own brain. And for LLMs we have only figured out the first one, at least without external algorithms.

[1] https://www.nature.com/articles/nrn1052

[2] https://pubmed.ncbi.nlm.nih.gov/26151918/

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