> LLMs often use em-dashes without spaces before and after, as a period replacement. Now that is only what an Oxford professor would write probably, I've never seen a human write text like that. So those specific em-dashes is a sure sign of a generated slop.
Evidently, you've never read text from anyone whose job requires writing, publishing, and/or otherwise communicating under rules established in (e.g.) the Chicago Manual of Style.
Those people broadly fall under "the Oxford professor" catch-all phrase. Obviously. I was talking about 99.99% of random internet texts, which do not conform to any Manual of style and are not written by literature majors. If I see a text authored by some known figure or in a respectable journal/site, then I don't have a task of detecting LLM slop in the first place. But when I do want to know if the text is generated or not, it is usually written by less sophisticated crowd, or anonymous.
Evidently, you've never read text from anyone whose job requires writing, publishing, and/or otherwise communicating under rules established in (e.g.) the Chicago Manual of Style.