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I used em dashes heavily 15 years ago when writing my PhD thesis.

So did every author of classic literature. People who think they can spot AI writing by simple stylistic indicators alone are fooling themselves and hurting real human authors

It's because LLMs were trained on classic literature that they began to use em-dashes in their now-famous manner.

Seriously, highbrow literature is heavily weighted in their training data. (But the rest is Reddit, etc.) This really explains a lot, I think.

Let’s just say when my coworkers started sending emails with tons of bold and bullet points when they had never done that before I felt pretty justified in assuming they used AI

Same, but 5 years ago. Now they're ruined for me lol.

My fear is people will actually take that article to heart, and begin accusing people of posting AI simply for using all sorts of completely valid phrases in their writing. None of those AI tells originated with AI.

I saw someone created a skill to weaponize that exact list to humanize the AI's output

There are no clear signs, at least for anyone who cares to hide them