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Deep learning gets the glory, deep fact checking gets ignored

rachel.fast.ai

131–140 of 174 posts

Re: Deep learning gets the glory, deep fact checking gets ignored

#131

Earlier quoted context omitted.

> Lately, I just steal embeddings from big models and slap a dumb classifier on top. Works better, runs faster, less drama. You may know this but many don't -- this is broadly known as "transfer learning".

Is it, even when applied to trivial classifiers (possibly "classical" ones)? I feel that we're wrong to be focusing so much on the conversational/inference aspect of LLMs. The way I see it, the true "magic" hides in the model itself. It's effectively a computational representation of understanding . I feel there's a lot of unrealized value hidden in the structure of the latent space itself. We need to spend more time…

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Re: Deep learning gets the glory, deep fact checking gets ignored

#132
post #66

Man, I’ve been there. Tried throwing BERT at enzyme data once—looked fine in eval, totally flopped in the wild. Classic overfit-on-vibes scenario. Honestly, for straight-up classification? I’d pick SVM or logistic any day. Transformers are cool, but unless your data’s super clean, they just hallucinate confidently. Like giving GPT a multiple-choice test on gibberish—it will pick something, and say it with its chest.…

Ironically, this comment reads like it was generated from a Transformer (ChatGPT to be specific)

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Re: Deep learning gets the glory, deep fact checking gets ignored

#133

Earlier quoted context omitted.

Honestly, if your accuracy/performance metrics are too good, that's almost a sure sign that something has gone wrong. Source: bitter, bitter experience. I once predicted the placebo effect perfectly using a random forest (just got lucky with the train/test split). Although I'd left academia at that point, I often wonder if I'd have dug in deeper if I'd needed a high impact paper to keep my job.

I believe it's very common. At some point I thought about publishing a paper analyzing some studies with good results (published in journals) and showing where the problem with each lies but at some point I just gave up. I thought I will only make the original authors unhappy, everybody else will not care.

> I believe it's very common.

Yeah, me too. There was a paper doing the rounds a few years back (computer programming is more related to language skill rather than maths) so I downloaded the data and looked at their approach, and it was garbage. Like, polynomial regression on 30 datapoints kind of bad.

And based on my experience during the PhD this is very common. It's not surprising though, given the incentive structure in science.

Re: Deep learning gets the glory, deep fact checking gets ignored

#134

Earlier quoted context omitted.

> Almost nobody is "anti-science". Last I checked: - 15% of Americans don't believe in Climate Change[0] - 37% believe God created man in our current form within the last ~10k years (i.e. don't believe in evolution)[1] I don't think these are just rounding errors. They're large enough numbers that you should know multiple people who hold these beliefs unless you're in a strong bubble. I'm obviously with you in news a…

According to your model, scientists who believe in God are anti-science. That's almost weirder than declaring that 15% of people not believing in anthropogenic global warming is some sort of crisis. It's a theory that seems to fit the data (with caveats), not an Axiom of Science. It's actually bizarre that 85% of people trust Science so much that they would believe in something that they have never seen any direct ev…

Climatologists have certainly invested much more in PR than geologists. So much so that their activities now look more like a global cult than science.

Re: Deep learning gets the glory, deep fact checking gets ignored

#135
post #55

Earlier quoted context omitted.

Yes, there are a lot of people who are anti-science. As in they do not believe the scientific method is a good way to find truth. There are people today who are rejecting very basic science that was accepted over a century ago.

No, there aren't. Most people don't realize when they're being trolled by things like e.g. flat earth types. Go read one of the groups, it's a trolling meme largely turned into something by the internet + media. Thanks to social media even if let's say 0.1% of English speakers believe (or pretend to believe) something, that'd be 1.6 million people, so you can get a false impression, especially when the media takes th…

I've seen science (the process, not just the results of that process) denounced as an aspect or tool of Western colonialism / imperialism. And there's that related "indigenous ways of knowing" thing that Canada has going on.

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Also the flat earth people actually aren't trying to argue against science (the process). They're arguing that everyone except them made either observational errors or reasoning errors.

Re: Deep learning gets the glory, deep fact checking gets ignored

#136
Verification is going to be an increasing problem with AI. Most of the work will be in verifying the incredible guesses that AI make. In some cases, it'll be important to easily ferret out the false positive, and in others, it'll be critical to ensure there are no false negatives. In science especially, our focus and reward structure will need to be on proper and sound verification.

Re: Deep learning gets the glory, deep fact checking gets ignored

#137

Earlier quoted context omitted.

> Like giving GPT a multiple-choice test on gibberish—it will pick something, and say it with its chest. If I gave a classroom of under grad students a multiple choice test where no answers were correct, I can almost guarantee almost all the tests would be filled out. Should GPT and other LLMs refuse to take a test? In my experience it will answer with the closest answer, even if none of the options are even remotely…

Yes, it should refuse. Humans have made progress by admitting when they don’t know something. Believing an LLM should be exempt from this boundary of “responsible knowledge” is an untenable path. As in, if you trust an ignorant LLM then by proxy you must trust a heart surgeon to perform your hip replacement.

Just on a practical level, adding a way for the LLM to bail if can detect that things are going wrong saves a lot of trouble. Especially if you are constraining the inference. You still get some false negatives and false positives, of course, but giving the option to say "something else" and explain can save you a lot of headaches when you accidentally send it down the wrong path entirely.

Re: Deep learning gets the glory, deep fact checking gets ignored

#138

Earlier quoted context omitted.

> Before it can do that, I have no hope that it can produce novel ideas. Producing novel ideas is the most famous trait of current LLMs, the thing people are spending all their time trying to prevent.

> Producing novel ideas is the most famous trait of current LLMs Could you please explain what you mean or give a simple example?

I think they were speaking to hallucinations. That is the case of a novel idea, often one that even sounds pretty plausible to a casual observer, but which isn't useful (arguably worse than simply being useless given it can trick people) and one connected only in a superficial way (why it fools the casual observer but the expert realizes it as a hallucination).

Re: Deep learning gets the glory, deep fact checking gets ignored

#139

Earlier quoted context omitted.

>Lately, I just steal embeddings from big models and slap a dumb classifier on top. Works better, runs faster, less drama. Sure but this is still indirectly using transformers.

Yes, but it's using the understanding they acquired to guide a more reliable tool, instead of also making them generate the final answer, which they're likely to hallucinate in this problem space.

How does this work?

Re: Deep learning gets the glory, deep fact checking gets ignored

#140
post #66

Man, I’ve been there. Tried throwing BERT at enzyme data once—looked fine in eval, totally flopped in the wild. Classic overfit-on-vibes scenario. Honestly, for straight-up classification? I’d pick SVM or logistic any day. Transformers are cool, but unless your data’s super clean, they just hallucinate confidently. Like giving GPT a multiple-choice test on gibberish—it will pick something, and say it with its chest.…

I’m not sure anyone I know could make an em dash with their keyboard off the top of their head.

[meta] Here’s where I wish I could personally flag HN accounts.

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