anchor: That's the kind of truth that reveals itself to documentary filmmakers after the fact, when they go over footage and discover unexpected patterns, dissonances, glimmers of a universe that's richer and messier than the one they set out to portray.
positive: There is a truth that reveals itself to documentary filmmakers only after they have gone over their footage.
negative: In going over footage, the filmmakers see a truth that is structured, ordered and very neat.