I did some "control" analysis on users' posts to test whether it was throwing false positives, even with long, technically dense posts. It did pretty well.
That's good to hear, but how many times did it suggest with a high confidence that it was AI-generated where you were not already convinced that it was? How many times did it surprise you? Did it ever surprise you by saying that a piece that
you thought was AI-generated was probably not?
Where did that text come from? Your post says it was generated by ChatGPT.
Well, my guess would be that, given that I said I asked ChatGPT, and given that I quoted it as being from ChatGPT, that it came from ChatGPT. What do you think?

I did, though, ask it to write the paragraphs in a more colloquial, less formal style - so as to avoid the obvious AI-formatting clues.
It will never say certain - for the same reason meteorologists never say 0% chance of precipitation (well, they do now, they didn't used to).
By definition, it can never be certain.
Okay.
So, we have no cases of false positives in-the-wild. And evern if we do, the policy is certainly not going to be automatic, and certainly not going to be unchallengable.
Which does sort of beg the question of why we need any policy whatsoever, when we can spot the (obvious) cases and things already are getting done about them. I mean, one
could implement additional policies that don't make any practical difference, but... why bother?
There's a big difference between: "we have a policy; please don't this" and "this violated our policy; you have been infracted".
Splitting hairs, DaveC. The issue is doing something moderators/users don't want at the site, not the action they take against an individual case.
My analysis (miniscule though it was) does not confirm this.
Okay - should we wait for you to trawl through the rest?
How do you distinguish? Where do you draw the line?
I don't think there is a "line" - not a hard and fast rule that needs be applied, anyway. It is up to individuals as to whether they recognise that the post is AI, that the poster is standing behind what they post, and then what they do with it.
Again, there's always the "ignore" button for posters you don't want to engage with, and the "report" function.
How about the proof being in the pudding? If there is sufficient AI-gen'ed content that we can tell and/or that it is flagged by a detector, then that is a lot.
Note that ChatGPT at least, is explicit about saying text blocks under 100 words results in low confidence verdicts. The corollary of that being that long blocks of text that do get flagged are likely because the person abdicated their thinking process.
If a lot of users spot it - then it's obvious - and it can be dealt with. We would then seem to not need a tool to tell us.
If not a lot of users spot it - then who cares? Clearly those posters don't seem to care, and if they subsequently get upset about having been "duped" then that's more about them. Again, i think it's the content of posts that matter, not who is posting it. A valid argument is a valid argument. If the poster/AI is hallucinating false examples, this would be an issue irrespective of whether it is AI or a real person lying.
And yes, I take the point of the accuracy improving with larger blocks of text. But the larger the block, the easier it is for us mere mortals to identify it. And it is only when
we identify it that it would seem to matter. If we can't, who cares.
If it doesn't get spotted then it doesn't get analyzed. So that's self-correcting.
So, again, you're only concerned with AI-generated content when it is already obviously AI-generated content.
Look, to be clear, I have no issue with moderators running suspect posts through a tool if that's what they want to do. I just don't think that that should be part of the policy, nor - as I mentioned previously - do I think AI-generated content should be flagged as such, but if people want to go down that route then definitely NOT as far as if people are using the likes of grammarly, or using AI just to help reword their own thoughts. That's too far and is an attack on the tools, not on the message.
Well, except that puts the entire onus on moderation.
??? It's already on moderation, and can only ever be their onus. All we lay-people can do is report, as with violations of all other site rules. If you don't like a post because you think it's AI-gen, report it. What else can you do? You can't infract them, you can't ban them, etc.
The idea of an official policy is that it doesn't have to go to the top floor. Anyone can simply say "Hey, that violates site policy. Don't do that. And I reject your argument based on that. Please try again in your own words, if you can."
I've got no issue with a policy that rejects AI-gen content, but a simple policy that rejects should be sufficient - e.g. "Do not simply post AI-gen content" should suffice. Everything else is up to the individual posters to report, as with violations of all other rules. And the onus is always on the moderator to assess the issue and react as they see fit.
Ultimately I'm looking to avoid there being a policy that would penalise people using AI in a manner whereby the reader can't tell that it's been used. So, something simple, something that helps remove the obvious.