There's actually an interesting theory that Duchamp fabricated his Readymades. http://www.nytimes.com/1999/03/20/arts/taking-jokes-by-duchamp-to-another-level-

There's actually an interesting theory that Duchamp fabricated his Readymades. http://www.nytimes.com/1999/03/20/arts/taking-jokes-by-duchamp-to-another-level-of-art.html http://www.nytimes.com/1999/03/20/arts/taking-jokes-by-ducha...