A professor at National Louis University was removed for using an assignment question that involved Holocaust denial.

Chicago’s National Louis University booted a faculty member who included the following question in one of his assignments: “Does it seem possible or does it seem impossible to you that the Nazi extermination of the Jews never happened?”

The question was reportedly designed to test marketing students’ ability to identify and correct faulty survey questions, according to the Jerusalem Post.

Among the assignment’s suggested corrections was: “Do you doubt that the Holocaust actually happened or not?”