All movies with complicated time schemes have the same problem to overcome: the movie's dramatic sequences, like tiles in a mosaic, must be trimmed to fit into a rigid pattern. Certain information must be highlighted in order to emphasize dramatic connections that, in a chronological treatment, would be readily apparent.
Filmmakers have to foreground these connections if they don't want to run the risk of leaving viewers bewildered-which is to say, if they want to make commercial movies.
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