that sounds like one of the worst heuristics I've ever heard, worse than "em-dash=ai" (em-dash equals ai to the illiterate class, who don't know what they are talking about on any subject and who also don't use em-dashes, but literate people do use em-dashes and also know what they are talking about. this is called the Dunning-Em-Dash Effect, where "dunning" refers to the payback of intellectual deficit whereas the illiterate think it's a name)
The audio artifacts of an AI generated video are a far more reliable heuristic than the presence of a single character in a body of text.
Thank you for saving me the time writing this. Nothing screams midwit like "Em-dash = AI". If AI detection was this easy, we wouldn't have the issues we have today.
Of note is theother terrible heuristic I've seen thrown around, where "emojis = AI", and now the "if you use not X, but Y = AI".
The em-dash=LLM thing is so crazy. For many years Microsoft Word has AUTOCORRECTED the typing of a single hyphen to the proper syntax for the context -- whether a hyphen, en-dash, or em-dash.
I would wager good money that the proliferation of em-dashes we see in LLM-generated text is due to the fact that there are so many correctly used em-dashes in publicly-available text, as auto-corrected by Word...