"The complexity of the deceivingly simple-looking Readymades has challenged many over the past century.  Trying to pin down the collection of Readymades into a workable body of pieces, many have attempted to seperate them into seperate catergories according to their relative degrees of ‘purity’.  The formation of such a scale on which to rate the readymades requires a basis for comparison, a point from which to gage degrees of variation: namely a comprehensive defintion of the readymade.  This has posed a clear challenge."