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If you're among the fortunate few to be invited into Warren Buffett's office in Omaha, Neb., you might notice something unusual about the walls. The billionaire investor and Berkshire Hathaway founder holds a degree from the University of Nebraska and another from the Columbia Business School—but neither is displayed in a frame.
Instead, as Buffett told the BBC a few years back, he has only one framed certificate on display—the one he received after completing a Dale Carnegie course.
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