University exams taken by fake students using artificial intelligence beat those by real students and usually went undetected by markers, in a limited study.University of Reading researchers created 33 fictitious students and used AI tool ChatGPT to generate answers to module exams for an undergraduate psychology degree at the institution.They said the AI students' results were half a grade boundary higher on average than those of their real-life counterparts.And the AI essays "verged on being u...