Nate Silver is the founder of FiveThirtyEight and the author of The Signal and the Noise.

“I know in a perfectly rational world, if you make an 80/20 prediction, people should know that not only will this prediction not be right all the time, but you did something wrong if it’s never wrong. The 20% underdog should come through sometimes. People in sports understand that sometimes a 15 seed beats a 2 seed in the NCAA tournament. That’s much harder to explain to people in politics.”

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