Professor Finds Clever Way to Identify ChatGPT Users

A professor has found a clever way to catch students using ChatGPT. He adds invisible text to the assignment document stating that to pass, students must cite the work of Frankie Hawkes. The catch is that Frankie is the professor's dog (and they are pictured together). Imagine the look on a student's face trying to explain that they read a book by a dog but just can't remember.