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'The Half-Life Of Facts'27:54
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Samuel Arbesman. (Courtesy of Mark McDonald)
Samuel Arbesman. (Courtesy of Mark McDonald)

Samuel Arbesman has a small goal.  He wants to upend just about everything we think we know about the nature of facts.

In his new book, "The Half-Life Of Facts: Why Everything We Know Has An Expiration Date," he argues that there is an actual pattern — a predictable rhythm — to how facts change.

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This segment aired on October 17, 2012.

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