A whole bunch of questions arose when the critics at Time Out New York were compiling their new list of the fifty greatest documentaries of all time. As they explain in their introduction to the special online slide show, such subjective mysteries as “What makes a documentary essential?” and “How ‘real’ is reality?” had to be contemplated. One thing is for sure—there are many important films on this list, regardless of category. And there are certainly a lot of Criterion titles (some very highly ranked), including Sans soleil, Night and Fog, Harlan County U.S.A., Nanook of the North, Crumb, Hearts and Minds, Salesman, Gimme Shelter, Hoop Dreams, Grey Gardens, Burden of Dreams, and Monterey Pop. Plus, we were tickled to see the inclusion of the genre-defying F for Fake, directed by Orson Welles. Here’s the list. And click here to explore all of Criterion’s documentary selections.