Comment by Emiledel
I think your idea has already worked for some companies to filter out AI applications, why not try? Especially in a font color identical to the background. You can also scaffold your way to generate questions that get the worst LLM performance, while still being very clear to understand, one side validating the clarity and theoretical tractability for the age, and one side actually solving it. Actor and two critics maybe. I have a container somewhere to create and use this kind of chain visually, could put it on GitHub but I'm sure there are dozens already