The Prisoner’s Dilemma

Professor Peter Frölich teaches “Intermediate Programming,” “Computer Science Fundamentals,” and “Introduction to Programming for Scientists and Engineers” at Johns Hopkins University. He uses a grading system in which the top score in any exam defines an A, and all other scores are graded down from that point (I like that system, by the way).

His students in all three courses hatched an ambitious conspiracy to ensure A’s for everyone.  They all agreed to refuse to enter the exam rooms, so the top score, and only score, anyone could get would be zero. Since the grading curve would have to start with that, they reasoned, everyone would have to get the top grade. The students stringently enforced their plot, apparently, and nobody broke ranks. Continue reading →