Alan Berliner's "Nobody's Business"

Alan Berliner's film "Nobody's Business" is about his father's life as well as his own life. It is difficult to separate Oscar's autobiography from Alan's autobiography at times. Where can one locate their separate autobiographical imprints? It was difficult for Alan to get his father to talk about his background, where he came from, and why he had become such a loner. He kept telling his son that he was not interested in the past, and could not imagine why Alan would be so interested in the past to make a film out of it. Alan seemed to want to discover something deeper about his family and about himself. There were a lot of issues of which he was unaware - he did not even really understand his own parents' divorce. Attempting to piece his background together, Alan used archival materials, he asked various relatives questions, he viewed old 8 mm home films, and he asked his father many personal questions. He stretched Oscar's patience. Did Alan end up with a better picture of who he was through the process of making the film? Was his aim to get his father interested in his own background? For whom is this film intended? Is this a film for Alan? For Oscar? Who is Alan's intended audience?