The jostling of young minds against each other has this wonderful attribute that one can never foresee the spark, nor predict the flash. What will spring up in a moment? Nobody knows. A burst of laughter starts from a scene of emotion. In a moment of buffoonery, the serious enters. Impulses depend on a chance word. The spirit of each is sovereign. A jest suffices to open the door to the unexpected. They are conferences with sharp turns, where the perspective suddenly changes. Chance is the director of these conversations.