Who Teaches the Teacher?

There's a scene in Indiana Jones and the Last Crusade where Indiana Jones is brought face-to-face with the person who has manipulated both Indy and his father in order to find the holy grail: Walter Donovan. Indy is surprised by this, as Donovan seemed so friendly and forthright before. And for good measure, Donovan had told him at the beginning of the movie, "Don't trust anybody." Surely he didn't mean to include himself in that?

Betrayal by the sage who initiated one's adventure is a well-worn trope and, if the number of movies it appears in is any indication, makes for great cinema. It does not, however, make for great board gaming. And, unfortunately, for those of us who teach board games, it can sometimes give us an unfair advantage.