That isn't a mistake AI would make though -- it's something a human would accidentally do when replacing em dashes with hyphens
replyWhich they would do if the text was LLM-generated and they wanted to disguise that fact. Or have a vibe-coded script to do the same.
replyI'm sorry but this comment is idiotic on so many levels
replyIt could have been a human trying to justify their existence. "no no, I wrote this ad copy myself: look, no em-dashes!".
replyQuite the reverse honestly, I found it really funny that they didn't bother to have an AI proofread it before sending out
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