The other day I read some old blog posts of mine (~2016) and they contain "em dashes". According to you they were all written by AI.

If we give up every bit of punctuation that ChatGPT uses, written language will become much worse.

For the last time.. Word (the program very popularly used by many reporters across the world to write articles) automatically autocorrects hyphens to em-dashes according to the default loaded grammar rules for En-US. The existence of em-dashes in an article does NOT immediately imply GenAI slop.

ChatGPT learned to use em dashes from somewhere. They were widely used before LLMs.

Not to use them excessively. Good human writing has variety and style. AI articles are the same boring template, doesn't matter if it's emdash or not.

A lot of people don't actually learn good writing at their fancy schools - but they do they learn the stylistic quirks that signal one went to the fancy school.

How do you think it got in the LLM training set in the first place?