In particular, this question, to the sculptor: If a drawing is traced, even with the greatest precision, from another drawing, you will perceive that the one is a copy. Although the differences may deviate less than half a hair, recognizable only by perceptual sensitivity, unanimously we rule the work of the intruder's hand as non-art. But where is the line of true art-when the sculptor's process often introduces the hands of a plaster caster, the mold maker, the grinder and the polisher, and the patina applier, all these processes and foreign hands intruding deviations upon what was once the original work?