If forging money or documents is bad, from society's point of view, why isn't forging works of art, bad, too? The truth is only one, we can't have different tr

If forging money or documents is bad, from society's point of view, why isn't forging works of art, bad, too? The truth is only one, we can't have different true versions of the same fact. If there are multiple versions of something, one is true while the other are fakes.