TALES FROM GRADING:
This year's favorite malaprop will almost certainly be "principle action problem" (instead of "principal-agent problem"). Tentative definition: "the theory which points out how difficult it can be to act on one's principles."
Also, we have had several people (in a class on American Foreign Policy) say that Allison and Zelikow's Essence of Decision proves the superiority of the Rational Actor Model, which is just... wrong. Completely.