TL;DR for AI writing warning signs:

  • Use of the em-dash (—)
  • Parallel sentence structure (e.g. "It's not just X, it's Y")
  • Grouping things in threes or at least odd numbers
  • Delineating line breaks with emojis
  • Odd/unnatural verbiage
  • Overuse of filler words (talking like your average LinkedIn post)
  • Exaggerated and empty praise
  • Weird analogies and similes
  • Restating and overclarifying points

TL;DR for signs something was written by a human:

  • Including anecdotes
  • Written in the first person
  • Tangents and nonlinear storytelling

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[–] [S] 82 points 1 year ago* (last edited 1 year ago) (7 children)

As a writer myself, I find this rather depressing. I use parallel sentence structure, group things in threes, use unusual-but-accurate words, and come up with my own metaphors because those are good ways to make your point. I'm also inclined to restate and overclarify things to minimize the chance of being misunderstood. I hate the idea of my writing being mistaken for AI slop. At least I type my em-dashes as --, which LLMs don't do.

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  • [–] 56 points 1 year ago

    This is the issue. It's not that this is "LLM writing style". It is just formal writing. The thing is most people write like third graders, so these stick out with good reason, just not that 'it is AI'.

    In general there aren't good ways to tell TBH. Literally giving it the command to 'not write like an AI' would make half of these disappear.

    Having the AI edit a text for you would add some of these. Not because it is AI, but because that's proper writing.

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  • [–] 16 points 1 year ago

    I don't think it's necessarily just a checklist of things, but rather the way an LLM's output resembles these techniques that puts it into an uncanny valley of writing. As a writer, you use these techniques deliberately and thoughtfully. LLMs can't do that, so the output just feels off.

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  • [–] 4 points 1 year ago

    Same. I used to write articles for an industry mag and that's how I was taught to do it.

    Some word processing apps automatically convert two dashes to an em dash. I've got that turned off right now.

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  • [–] 32 points 1 year ago (3 children)

    Fuck — as an designer and typography nerd I just love them em-dashes.

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    [–] 26 points 1 year ago* (2 children)

    I thought it would be the semicolon, judging from the thumbnail. Now that would piss me off; I love semicolons, it would be unfair if they become the hallmark of LLMs.

    I also appreciate the long dash but on mobile keyboard it's so awkward to find that nobody uses it for comments anymore.

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  • [–] 2 points 1 year ago

    I also appreciate the long dash but on mobile keyboard it's so awkward to find

    I find it's the opposite! I can't find it on OG keyboards which is when I use the double hyphen — on mobile I just long press the dash button to find it

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  • [–] 26 points 1 year ago (1 child)

    Please don't give this any credit. Nonsense like this is already being used to filter web form submissions for things like job applications.

    Source: I applied for a role at a medium-sized company a couple weeks ago and was auto-rejected because my cover letter appeared to be AI-generated. I clicked "back", removed an em-dash, and the form was accepted.

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    [–] 24 points 1 year ago (2 children)
  • [–] 5 points 1 year ago

    Thought I might be one too, until the "tangents and nonlinear storytelling" as evidence of being human and the scene from Megamind where he goes "being bad is the one thing I'm good at" came to mind.

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  • [–] 23 points 1 year ago (3 children)

    Welp, TIL that I’m a LLM. I frequently use at like 75% of those in my creative writing. I learned to use all of these by reading books.

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  • [–] 8 points 1 year ago

    That's the issue - so did AI. Real people use them less often because real people often don't read a lot of books. AI might not really understand the words it's spewing out, but it's at least good at formatting them as it's been shown.

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  • [–] 4 points 1 year ago

    The summary isnt hitting the nuance.

    I see a lot of AI garbage.

    You get emojis as list elements. You see a lot of dry writing, like you're reading a blog. You get vague nothings that sound good, but are meaningless.

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  • [–] 21 points 1 year ago (4 children)

    For me the most obvious tell is using 16 paragraphs to say something that could have been said with 16 words.

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  • [–] 7 points 1 year ago (1 child)

    I have ADHD and like en and em dashes. I've been known to use emoji points to make my 16 paragraphs easier to read.

    Fortunately I think the constant personal tangents arr saving me

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  • [–] 4 points 1 year ago* (1 child)

    That's because you're probably not used to people from STEM areas who tend to be thorough rather than risk that some things might be mis- or not at all understood: the less one is sure about the level of knowledge or ability to keep up of those on the other side, the more thorough the explanation becomes.

    Also the deeper you think about something the more elements there are to explain.

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  • [–] 3 points 1 year ago

    I have a STEM background myself and spent a good bit of my career writing (relatively poorly in my opinion) technical documentation. I understand what you're saying and I guess I didn't make my point very well.

    I was hoping people would understand that I was referring to the enshitification of internet search results - where every search leads to pages of results of entire articles about very simple topics that say basically nothing. It seems obvious to be, though I admit I'm making an assumption, that the vast majority of these articles are LLM generated fluff attempting to lure people to pages to generate ad revenue.

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  • [–] 13 points 1 year ago (6 children)

    literally any tell will be fed back into the models to make them harder to detect, I wouldn't be surprised if this is already being automated

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    [–] 12 points 1 year ago (3 children)

    I'm not going to stop using em dashes. Find a different indicator!

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  • [–] 2 points 1 year ago (1 child)

    Semicolons are also an indicator. Who the hell uses those?

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  • [–] 3 points 1 year ago

    I use it occasionally, when writing lists with lots of detail, or to separate parts of the sentence where I already used multiple commas.

    there are many thought-provoking ideas about conscience, the human brain, and alien life; yet it is wrapped in a mediocre sci-fi action movie script

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    [–] 9 points 1 year ago

    Repeating the same content with different wording later in the text. For instance: saying the same statement you did earlier a little differently

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  • [–] 8 points 1 year ago* (last edited 1 year ago)
    • Including anecdotes
    • Written in the first person
    • Tangents and nonlinear storytelling

    It's like they read a Vonnegut book and said, "That right there is peak human!" And I'd agree!

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  • [–] 8 points 1 year ago (1 child)

    Good luck, the next rounds of training will iron these out and the line will continue blurring. These tips will flag a lot of false positives from educated people, and those comments are valuable. Maybe if you look for human-style mistakes you will have hope determining if comment was made by a human, like capitalisation, autocomplete issues, and typos.

    It's much easier spotting AI in photos, videos and probably audio.

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    [–] 7 points 1 year ago

    TIL that following many decades of carefully observed writing best practices makes you an AI.

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  • [–] 4 points 1 year ago* (1 child)

    This stuff can also pip up if AI was merely used to spellcheck.

    This list would be wrong way too often dude

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  • [–] 3 points 1 year ago

    Weird analogies and similes

    Well, guess I'm half AI or, to put it another way, I'm similar to a machine that's being frequently affected by cosmic rays when doing calculations

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  • [–] 3 points 1 year ago

    meanwhile here i am with the silly three-em dash⸻too long to be used in most cases, so it's rarely used when training ai⸻and the two-em dash⸺not quite as absurd, but still pretty rare⸺and i keep on looking for weird characters to use regularly

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  • [–] 2 points 1 year ago

    Although I wonder how long these signs would be that effective for, since they seem really model-specific.

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    • Including anecdotes
    • Written in the first person
    • Tangents and nonlinear storytelling

    Weird that AI can't handle talking in the first person. Why just the other day I, a human, was saying to my sister, who is also human, about how strange AI is. See, she was grew up in another home with her mother where they didnt use as much technology. We shared a father who fought in Desert Storm. His favorite color was blue, like the kind you see in very thick ice. See most people think ice is just clear, but that is only becuase you need a lot of ice to properly refract light into its true blue color. Refraction works because colors come from different wavelengths of electromagnetic radiation, and those wavelengths bend at different angles when refracted by passing through transparent materials.... what was I saying? Oh yeah, AI is strange.

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  • [–] 2 points 1 year ago

    Useful alternative not using a AI detector.

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