"To refuse a hearing to an opinion, because they are sure that it is false, is to assume that their certainty is the same thing as absolute certainty. All silencing of discussion is an assumption of infallibility."

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One very important difference between color and monochromatic photography is this: in black and white you suggest; in color you state. Much can be implied by suggestion, but statement demands certainty... absolute certainty.

— Paul Outerbridge