It's perhaps the most pernicious Claudism. Or just the one that gets my goat the most. Saying what something isn't, usually twice, before saying what it is. What a fucking waste of words.
That's the most annoying one, and the two negated things more often than not end up being something no one would have ever considered in the first place.
I'm not defending claudeslop, but TBF, anaphora and its lesser-known sibling: epistrophe far predate the English language, let alone something new like LLMs.
"I'm not defending claudeslop, but <defends slop>". People obviously know this. The problem is that using a dramatic rhetorical flourish every third sentence for completely un-dramatic things is fucking tiring. And so are the people defending this shit. "Oh, humans use em-dashes too, so actually there's literally no difference between a human using one or two and Claude using 400 em-dashes in one article". A human using things correctly and a language model using them incorrectly are not the same fucking thing.