The really funny thing is, I'll probably miss that tell when it's gone, as every AI company eventually scrubs away obvious blemishes like that from their flagship models.
Interestingly, there are still many other good literary devices that are not yet used by AI - for example, sentences of varying lengths. There is still scope for a good human editor to easily outdo LLMs... but how many will notice? Especially when one of the editorial coloumns in the NYT (or Atlantic, forgot exactly) is merrily using LLMs in the heartfelt advice coloumn. It's really ironic, isn't it? ;)
LLMs are also great at following style, not via criteria but via examples. So this is something that’s easily overcome.
I discovered this when I made an error in a creative writing tool I was working on. I told it to follow the writing style of existing story text, but it ended up making the system messages follow the same style. It was quite amusing to see tool messages and updates written in an increasingly enthusiastic Shakespearean/etc prose (so I left it unfixed!)
Wikipedia has an excellent article about identifying AI-generated text. It calls that particular pattern "Negative parallelisms". https://en.m.wikipedia.org/wiki/Wikipedia:Signs_of_AI_writin...