400The goals of the underlying model are to challengethe player by displaying mastery over skills that seemobvious to human players, yet being unpredictableenough to keep the player on his toes, since“irrationality keeps life interesting”. The AI shouldassist the storytelling by developing the personalitiesof the non-human players.A key distinction in gameness is a turn-takingsystem that is more than simple branching. Suchsimple branching leads to an exponential increase inwork for each level of interaction and a “fallacy ofchoice” (Dove 1994 see narrative). This then requiresa underlying model that responds to the game worldand actors within it or provides a structure so that thecommunity of learners provide the intelligencethemselves.