There's also the classic “it's not just X, it's Y”, adjective overuse, rule of 3, total nonsense (manage memory with surgical precision? what does that mean?), etc. One of these is excusable, but text entirely comprised of AI indicators is either deliberately written to mimic AI style, or the product of AI.
"not just x but y" is definitely a tell tale AI marker. But, people can write that as well. Also our writing styles can be influenced as we've seen so much AI content.
Anyway, if someone says they didn't use AI, I would personally give them the benefit of the doubt for a while at least.
Like many scholarly linguistic construction, this is one many of us saw in latin class with non solum ... sed etium or non modo ... sed etium: https://issuu.com/uteplib/docs/latin_grammar/234. I didn't take ancient Greek, but I wouldn't be surprised if there's also a version there.
