Counterfeiting is the sincerest form of copyright violation

During the nineteen-thirties, when the fabrication of counterfiet Picassos was at its height - his works being the most often countereited because they rated the hightest prices - an old journalist friend took a small Picasso painting belonging to some poor devil of an artist to Picasso himself for authenification, so the inmpoverished artist could sell it. "Its false," Picasso said. The friend took him another little Picasso, from a different source, and then a third. "Its false," Picasso said each time. "Now listen, Pablo," the friend said. "I watched you paint this last picture with my own eyes. Picasso replied, "I can paint false Picassos just as well as anybody." He then bought the first Picasso at four times the price the poor artist might have hoped it would fetch"
Janet Flanner's World: Uncollected Writings 1932-1975