Hacker News new | ask | show | jobs
by tbalsam 1047 days ago
I think you may be missing the extensive lines of research covering those topics. Memorization vs Generalization has been a debate before LW even existed in the public eye, and inputs that networks have unusual sensitivity to have been well studied as well (re:chaotic vs linear regimes in neural networks). Especially the memorization vs generalization bit -- that has been around for...decades. It's considered a fundamental part of the field, and has had a ton of research dedicated to it.

I don't know much either way about RLHF in terms of its direct lineage, but I highly doubt that is actually what happened, since DeepMind is actually responsible for the bulk of the historical research supporting those methods.

It's possible ala the broken clock hypothesis + LessWrong is obviously not the "primate at a typewriter" situation, so there's a chance of some people scoring meaningful contributions, but the signal to noise ratio is awful. I want to get something out of some of the posts I've tried to read there, but there are so many bad takes written with more bombastic language that it's really quite hard indeed.

Right now, it's an active detractor to the field because it pulls attention away from things that are much more deserving of energy and time. I honestly wish the vibe was back to people even just making variations of Char-RNN repos based on Karpathy's blog posts. That was a much more innocent time.

1 comments

> I think you may be missing the extensive lines of research covering those topics. Memorization vs Generalization

I meant this specific analysis, that neural networks that are over-parameterized will at first memorize but, if they keep training on the same dataset with weight decay, will eventually generalize.

Then again, maybe there have been analyses done on this subject I wasn't aware of.

Gotcha. I'm happy to do the trace as it likely would be fruitful for me.

Do you have a link to a specific post you're thinking of? It's likely going to be a Tishby-like (the classic paper from 2015 {with much more work going back into the early aughts, just outside of the NN regime IIRC}: https://arxiv.org/abs/1503.02406) lineage, but I'm happy to look to see if it's novel.

The specific post I'm thinking of is A Mechanistic Interpretability Analysis of Grokking - https://www.alignmentforum.org/posts/N6WM6hs7RQMKDhYjB/a-mec...

I originally thought the PAIR article was another presentation by the same authors, but upon closer reading, I think they just independently discovered similar results. Though the PAIR article quotes Progress measures for grokking via mechanistic interpretability, the Arxiv paper by the authors of the alignmentforum article.

(In researching this I found another paper about grokking finding similar results a few months earlier; again, I suspect these are all parallel discoveries.)

You could say that all of these avenues of research are all re-statements of well-known properties, eg deep double-descent, but I think that's a stretch. Double descent feels related, but I don't think a 2018 AI researcher who knew about double descent would spontaneously predict "if you train your model past the point it starts overfitting, it will start generalizing again if you train it for long enough with weight decay".

But anyway, in retrospect, I agree that saying "the LessWrong community is where this line of analysis comes from" is false; it's more like they were among the people working on it and reaching similar conclusions.