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Biases: An Introduction - LessWrong

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Imagine reaching into an urn that contains seventy white balls and thirty red ones, and plucking out ten mystery balls. …

x Biases: An Introduction — LessWrong Predictably Wrong Heuristics & Biases Rationality Frontpage 352 Biases: An Introduction by Rob Bensinger 11th Mar 2015 6 min read 17 352 Imagine reaching into an urn that contains seventy white balls and thirty red ones, and plucking out ten mystery balls. Perhaps three of the ten balls will be red, and you’ll correctly guess how many red balls total were in the urn. Or perhaps you’ll happen to grab four red balls, or some other number. Then you’ll probably get the total number wrong. This random error is the cost of incomplete knowledge, and as errors go,

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