Did you deliberately try for ambiguity as opposed to a specific meaning for any scene or image?
No, I didn't have to try for ambiguity; it was inevitable. And I think in a film like 2001, where each viewer brings his own emotions and perceptions to bear on the subject matter, a certain degree of ambiguity is valuable, because it allows the audience to "fill in" the visual experience themselves. In any case, once you're dealing on a nonverbal level, ambiguity is unavoidable. But it's the ambiguity of all art, of a fine piece of music or a painting -- you don't need written instructions by the composer or painter accompanying such works to "explain" them. "Explaining" them contributes nothing but a superficial "cultural" value which has no value except for critics and teachers who have to earn a living. Reactions to art are always different because they are always deeply personal.
"The Film Director as Superstar", Joseph Gelmis, 1970 (Doubleday and Company: Garden City, New York)