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In an article from 1995, Watanabe, Sakamoto, and Wakita described an experiment which showed that pigeons can be trained to discriminate between paintings by Picasso and by Monet. The birds were first trained on a limited set of paintings. The experiment has shown that a pigeon was able to obtain food by repeated pecking when shown a painting from Picasso; when it was a Monet, pecking had no effect. After a while, the pigeons would only peck when shown Picasso paintings.

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