"If Conceptual Art was about de-emphasizing the art object, it's easy to trace that notion to a much earlier time. To 1917, in fact, when Marcel Duchamp famously exhibited a porcelain urinal and signed it 'R. Mutt.' It was a sudden reduction of the idea of art. Duchamp was saying for the first time, with a shocking visual pun, that, with the force of idea behind it, anything could be art."