The main thrust of their complaint (as paper authors!) is that they used the "copyrighted" exam questions. I don't understand how both can be true: to have cont

The main thrust of their complaint (as paper authors!) is that they used the "copyrighted" exam questions. I don't understand how both can be true: to have contributed to this paper, which entirely rests on ChatGPT (not) answering exam questions, and not knowing that that is what the paper is all about. That is certainly an issue that would be discovered well before anyone is sitting down to write the actual paper.