An anecdote: the International Baccalaureate diploma is very rigorous - it is basically modeled on British A-levels, and students earn univeristy transfer credit if they earn high enough marks in a subject. Although some of the assessment is done internally, all of it is moderated by IB, and most courses conclude with sets of rigorous exams that are anomynized and externally assessed.
In Language and Literature, which I teach, the last exam students write is their Paper 2, an exacting compare/contrast essay discussing two studied works of literature in response to one of four prompts that are unknown until the start of the exam (example: "In the work of two authors you have studied, compare how the physical setting creates a tension that sustains the reader’s interest."). In order to succeed, students cannot discuss their texts in general terms, they must know them inside out, and be able to support their argument with specific references, which means memorized quotations. So one thing they do when revising and prepping their focus texts is to memorize a number of key quotations that could be unpacked in the context of various essay prompts - basically, that speak to the heart of their texts.
This year, as the students gathered for the exam and we teachers were there to cheerlead them, a number were flexing their knowledge a bit - "look at how well I know my stuff" - the usual business. And one student started rattling off quotations from British poet Simon Armitage to me.
Except they weren't. I knew this instantly as I had, just this term, prepared a new study guide for Armitage. The student argued with me, and then even showed me his study notes, with a huge number of quotations that purported to be from Armitage but were instead generic pablum that approximated the themes of his work as generated by, say, an algorithmic program with no actual sentience or comprehension. The student then confessed that he had searched them up the night before using, you guessed it, ChatGPT. Which had just invented BS, but because he hadn't actually studied, he bought it.
Unfortunately, this is literally as he was walking into an exam worth 25% of his final mark. So I told him not to use any of the BS and just do his best with what he knew and...we will see. Results are published later today, actually. Not good, though.
And what struck me was how confident he was in the AI. As mentioned, I had personally created a rigorous study guide for them, which included tons of relevant quotations, but required effort. And instead, he had come in confident that a few hours with AI could replace putting in the work.