Corruption, Free-Riders, and The (Non-)Wisdom of Crowds

"John and his father go out to look at the stars. John sees two blue stars and a red star. His father sees a green star, a violet star, and two yellow stars. What is the total temperature of the stars seen by John and his father?"

This is the story of what happened when Richard Feynman became involved in choosing maths books for California schools.
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