premise: Testimony: The Story of Shostakovich is a 1988 British musical drama film directed by Tony Palmer and starring Ben Kingsley, Sherry Baines and Robert Stephens. The film is based on the memoirs of Dmitri Shostakovich (1906–1975) as dictated in the book "Testimony" (edited by Solomon Volkov, ISBN  ) and filmed in Panavision. Some consider the book to be a fabrication.
hypothesis: The source material for The Story of Shostakovich is a fabrication
reason: Some believe it to be a fabrication, meaning that some do and others don't, so it could be either true or false.