Dan Drezner invites professors to submit the worst sentence they’ve seen from a student-written term paper. All of my candidates are in the office this evening, so I’ll have to defer my participation to tomorrow, but I’m sure I have some possibilities lurking around the office.
In fairness, however, most of the essays (and even many of the hastily-written final exams) I read this semester were quite good; I was actually pleasantly surprised, given the horror stories I’d heard from a colleague earlier in the semester.