In a blind test of which is which, even art students could only choose the most famous works of the most famous modern artists 62% of the time compared to the squiggles of children, chimpanzees and elephants.
...nobody ever had to do an experiment to find out whether people can tell the difference between a painting by a monkey and a painting by Monet. Nobody ever looked at a Rembrandt and wondered if, just perhaps, some merry prankster had given a pack of paints to a pachyderm and told it to go to town.