‘9/11’: Just the facts?

A reader writes:
“In your articles discussing Michael Moore’s film ‘Fahrenheit 9/11,’ you call it a documentary. I always thought of documentaries as presenting facts objectively without editorializing. While I have enjoyed many of Mr. Moore’s films, I don’t think they fit the definition of a documentary.”
That’s where you’re wrong. Most documentaries, especially the best ones, have an opinion and argue for it. Even those that pretend to be objective reflect the filmmaker’s point of view. Moviegoers should observe the bias, take it into account and decide if the film supports it or not.
http://www.suntimes.com/output/eb-feature/cst-ftr-moore18.html