4 ms·
> The best anyone expects from an LLM "truth vector" is that it would encode the model's belief about whether the statement is true. I think even that's too-op
by Terr_ 3mo ago
> The best anyone expects from an LLM "truth vector" is that it would encode the model's belief about whether the statement is true.
I think even that's too-optimistic: The LLM is a document-extender, so its "belief" is whether a token seems like it would statistically fit-next in a partial document, based on prior documents. This is usually not the kind of analytic truth we're interested in, and we've already figured out how to constantly extract it.
If we peek at vectors and weights, we'll we'll probably end up measuring the moods and styles for whatever tokens are about to get emitted next, whether that's dialogue for a fictional character (of various kinds), a narrator, or an impersonal memo conclusion paragraph. We'll be measuring "earnestness and conviction", on the same level as "loquaciousness" or "pleading" or "talking like a pirate."
So is Truthiness [0] what we really want? Probably not. If our document described the character as Yoda, then The Force connecting all existence ends up truthy. Using "a really gullible person" can repeat anything you supply as truthy. Even if we set things up as "a respected encyclopedia article" or "a relentlessly logical super-genius", we're really changing the influence mix of styles and biases, rather than creating a logical mind independent of text inside the LLM.
[0] https://en.wikipedia.org/wiki/Truthiness https://en.wikipedia.org/wiki/Truthiness
- FeepingCreature 3mo agoI half-disagree: this is exactly the kind of analytic truth humans are usually interested in. "Truth" as perceived by humans is based on a massive system of prefiltering, narrowing, preprocessing and situational awareness. A drop of water falls on your hand. Is it raining? Depends. Are you painting a watercolor picture outside? Then probably yes. Or are you going to the store? Then probably no. So truth is inseparable in practice from usecase. Is a whale a fish? I don't know, are you a geneticist or a poet? It's all mood and usecase. I'm not convinced there's any difference in kind between the LLM's speaker-selection and a human's choice of research field. That is to say, it's not that I think you're wrong, it's that there is no other pursuit of truth than what you describe. If anything, the LLM's pursuit of next-token prediction is unusually honest for a truth-seeker.
- TeMPOraL 3mo agoWorth remembering what the goal function behind the next token prediction is. It's what makes it go beyond moods and styles, and work with concepts of fact the same way we do.