There was one in a previous AoC that I think stumped a lot of AI at the time because it involved something that was similar to poker with the same terminology but different rules. The AI couldn't help but fall into a "this is poker" trap and make a solution that follows the standard rules.
We all have our writing quirks, like how some people use shorthand for words where there is only a marginal difference (like "people" => "ppl"), or even people who capitalize the start of sentences, but not the start of their whole text.
There's plenty of prior work to go on. I mean, you could use a font ligature or one of the browser extensions (although I don't know if Chrome still lets you have a browser extension touch all text).
Change ChatGPT to 'my drunk uncle' while you're at it.
It affects a certain disposition for the writer; the information it contains isn't in the actual data they are expressing, but rather the state of mind that they express it from, which can be important context. Oftentimes it can indicate exasperation, which is an important social queue to be able to pick up on.
A little excerpt from Arlo Guthrie
"I mean, I mean, I mean that just, I'm sittin' here on the bench,
I mean I'm sittin here on the Group W bench, because you want to know if I'm moral enough to join the army, burn women, kids, houses and villages after being a litterbug."
Imagine that without the "I mean"s in it, and the importance of how they convey his stance on the situation.