From a prescriptive point of view, a solution concept is a set of practical recommendations—i.e., recommendations about what the players should do in a game. From a predictive point of view, solution concepts describe what the players will actually do in certain interactive situation. Consider again the pure strategy Nash equilibria in the above example. Under a prescriptive interpretation, it singles out what players should do in the game. That is, Ann and Bob should either play their component of \((u, l)\) or \((d, r)\). Under the predictive interpretation, these profiles are the ones that one would expect to observe in a actual play of that game.