Primates and humans share a sense of fair play Logan knows when he's been handed a raw deal. He and Liam, the monkey next to him, just did the... » More

Primates and humans share a sense of fair play

Logan knows when he's been handed a raw deal. He and Liam, the monkey next to him, just did the exact same trick and Liam was rewarded with a grape. Logan got a cucumber. Any monkey knows grapes are more prized than that boring old cucumber slice Logan received. So he simply tosses that cucumber slice out of his cage.

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