We build and describe an agent-based model: the Surprise Game. The game comprises a “world” of 30 fi rms, each of which has to survive (and, if possible, prosper) in its environment, which is nothing more than the other 29 fi rms. Each fi rm has to latch onto one or other of the four strategies that are predicted by the theory of plural rationality but has to relinquish that strategy and latch ...