I guess since we're not talking about art anymore, and are instead talking about the veracity of information, we can safely agree. If I read a news story, I do value that information higher to the extent I am convinced it is actually true information. If I read someone's autobiography, I do value that to the extent that I trust them and that it is coming from them. A piece of fiction, however, or music, or visual art, is something that can stand on its own and be appreciated or not without having to assume this context. The context and provenance can certainly color the appreciation, but it is no longer necessary.