this post was submitted on 20 Jan 2024
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I hear people saying things like "chatgpt is basically just a fancy predictive text". I'm certainly not in the "it's sentient!" camp, but it seems pretty obvious that a lot more is going on than just predicting the most likely next word.

Even if it's predicting word by word within a bunch of constraints & structures inferred from the question / prompt, then that's pretty interesting. Tbh, I'm more impressed by chatgpt's ability to appearing to "understand" my prompts than I am by the quality of the output. Even though it's writing is generally a mix of bland, obvious and inaccurate, it mostly does provide a plausible response to whatever I've asked / said.

Anyone feel like providing an ELI5 explanation of how it works? Or any good links to articles / videos?

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[–] [email protected] 72 points 9 months ago* (last edited 9 months ago) (2 children)

It is literally the same exact kind of algorithm that predicts the next word you will type on your phone based on what's already been typed. The differences are that it has a much larger training dataset, which means more accurate predictions, it processes based on the entire body of text that has already been given (including the hidden prompt and previous messages), and that it doesn't always predict whole words, but instead clusters of characters.

If you want a more general overview of how machine learning works in general, this is a good video series to watch: https://www.youtube.com/watch?v=aircAruvnKk

If you want to see some evidence that it doesn't truly understand what it says, try having it generate and explain some jokes or riddles that rely on wordplay. It will completely shatter the illusion.

[–] [email protected] 10 points 9 months ago* (last edited 9 months ago) (1 children)

Me:

You are a talented comedian. Generate some jokes or riddles that rely on wordplay.

ChatGPT 4:

Sure, here are a few wordplay-based jokes and riddles:

Why don’t scientists trust atoms? Because they make up everything!

I told my wife she should embrace her mistakes. She gave me a hug.

What do you call fake spaghetti? An “impasta.”

I’m reading a book on anti-gravity. It’s impossible to put down!

Why was the math book sad? Because it had too many problems.

Enjoy these light-hearted plays on words!

Edit: I prodded it a little, and I actually quite like the fourth one below.

Me:

These aren’t very clever. Can you generate some that a more mature audience would appreciate?

ChatGPT:

Of course, here are some more sophisticated wordplay-based jokes suitable for a mature audience:

Parallel lines have so much in common. It’s a shame they’ll never meet.

A Freudian slip is when you say one thing but mean your mother. I mean another.

I'm reading a book on the history of glue. Can't put it down, but I'm sticking to it.

Time flies like an arrow; fruit flies like a banana. A classic example of linguistic ambiguity.

The rotation of Earth really makes my day. Quite literally.

These jokes involve a bit more linguistic and conceptual play, appealing to an audience that enjoys a deeper level of wordplay.

[–] [email protected] 18 points 9 months ago (1 children)

All of those jokes are plagiarized. It doesn't actually understand the jokes, it's just repeating ones that it's seen before. Ask it to explain why some of these are funny.

[–] [email protected] 7 points 9 months ago

Seriously. I've literally heard all of those jokes before. It may have even stolen them all from a single website.

[–] [email protected] 3 points 9 months ago (1 children)

Great video! Thanks for posting that

[–] [email protected] 5 points 9 months ago (2 children)

I agree, that was good.

My major takeaway is that neutral networks, and AI in general, are mostly pattern recognition with a little bias and weighting thrown in to improve accuracy.

And that is why I question all the supposedly amazing things people seem to think it will do and many of the applications of AI.

[–] [email protected] 2 points 9 months ago (1 children)

That's exactly right. It is a statistical model that is based on some training dataset. The quality of the predictions is only as good as the completeness and bias of the training set.

[–] [email protected] 5 points 9 months ago (1 children)

And it is one of the major issues with giving AI and the corporations who make them free reign to "think" and inform decision making. Feed it a racist dataset, and the AI will be racist. Feed it misinformation, and the AI will only reproduce misinformation.

[–] [email protected] 1 points 9 months ago

The proof that AI is just garbage in and garbage out is that AI always does this while some people are able to be anti-racist and anti-misinformation as a response even if most people fall for it.

Feed it a racist dataset, and the AI will be racist. Feed it misinformation, and the AI will only reproduce misinformation.

[–] [email protected] 2 points 9 months ago (1 children)

That's my take as well, I would just like to know more about the weighting/bias.

[–] [email protected] 6 points 9 months ago

Weighting and bias are based on the training dataset. And the training dataset of ChatGPT is mostly internet content, literature, social media discussions, articles, etc.

So the inherent biases are going to be limited in the same way. For example, ChatGPT is not good at generating or interpreting code written in Malbolge, despite the fact that this language is meant to be relatively easy to understand for a machine yet difficult for a human to understand. Because it isn't processing like a machine, it is processing text like a person.

It also is bad at understanding wordplay like puns since wordplay requires a simultaneous understanding of the meaning of a word as well as the linguistics that underly that word. It is decent at generating puns which already exist and are out in the world, but it can't creatively generate new ones or interpret novel puns or other wordplay, since that would require a deeper understanding of the language.

Looking at the things it is bad at can give a great insight into its limitations, and in turn into how it works.