Presence of Mind deals less with physical space and more with psychological and mental space. The film is simply a series of shots of people and their surroundings. Some of the shots are synchronous sound, some are non-synchronous sound, some are silent and some are just sound without picture. My experience is that synchronous sound situations create a mental reality or presence which is greater than the sum of its parts. In other words, the synchronous combination of picture and sound forms a spatial reality which is uniquely present. Presence of Mind deals with variations of this spatial presence created by sync sound film.