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
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.