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Oops! We Automated Bullshit. | Department of Computer Science and Technology
(www.cst.cam.ac.uk)
this post was submitted on 19 Nov 2023
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That seems like it should work in theory, but having used Perplexity for a while now, it doesn't quite solve the problem.
The biggest fundamental problem is that it doesn't understand in any meaningful capacity what it is saying. It can try to restate something it sourced from a real website, but because it doesn't understand the content it doesn't always preserve the essence of what the source said. It will also frequently repeat or contradict itself in as little as two paragraphs based on two sources without acknowledging it, which further confirms the severe lack of understanding. No amount of grounding can overcome this.
Then there is the problem of how LLMs don't understand negation. You can't reliably reason with it using negated statements. You also can't ask it to tell you about things that do not have a particular property. It can't filter based on statements like "the first game in the series, not the sequel", or "Game, not Game II: Sequel" (however you put it, you will often get results pertaining to the sequel snucked in).
Yeah, it's just back exactly to the problem the article points out - refined bullshit is still bullshit. You still need to teach your LLM how to talk, so it still needs that cast bullshit input into its "base" before you feed it the "grounding" or whatever... And since it doesn't actually understand any of that grounding it's just yet more bullshit.