An anthropology professor at Princeton University allegedly used the n-word multiple times during a lecture this week, prompting several students to walk out and an expletive-laced in-class confrontation. Several students told The Daily Princetonian that professor Lawrence Rosen used the word “n—-r” when asking a question Tuesday during his anthropology 212 course, “Cultural Freedoms: Hate Speech, Blasphemy and Pornography.”