Extraordinary evidence generates extraordinary claims. I discuss the remarkable memory skills of chimpanzees tested in the Kyoto Primate Laboratory, and suggest a novel – but deflationary – hypothesis to explain them. Could the chimpanzees, who have been highly trained to learn the sequence of Arabic numerals, have developed number–colour synaesthesia?

中文翻译：

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“这只黑猩猩会在记忆游戏中踢你的屁股——但他到底是怎么做到的？”

非凡的证据产生非凡的主张。我讨论了在京都灵长类实验室测试的黑猩猩非凡的记忆能力，并提出了一种新颖但通货紧缩的假设来解释它们。受过高度训练以学习阿拉伯数字序列的黑猩猩会发展出数色联觉吗？