David Thomson: “The most daring novelty in Citizen Kane was not its deep-focus photography, overlapping sound, or flashback structure (though those things are truly difficult). The greater challenge was in saying, Don’t expect one viewing to settle this — or even several. For the mystery here is the most precious thing. Unknowability is close to where this film is leading. For 1941, that was not just daring or innovative; it was close to a denial of the entertainment medium.”