Anecdotally, before ChatGPT I was once asked to review 10 peers' homework in a computer science course, and 8 of them had the same or nearly the same answers. I

Anecdotally, before ChatGPT I was once asked to review 10 peers' homework in a computer science course, and 8 of them had the same or nearly the same answers. I couldn't believe plagiarism was that common, so I assumed they all just went to the same discussion section and used a solution provided by an over-helpful TA. Later I asked another student about it and he laughed and told me to keep quiet. So then I asked the instructor about it and he told me I should have failed them but didn't seem interested in taking any other action.