Despite beating the market for decades and turning a failing textile mill into one of the world's most admired business empires, Warren Buffett is known for his humility. He often speaks frankly about the mistakes he has made during his career and shares the lessons he learned with the public. In his letter to Berkshire Hathaway Inc. (NYSE:BRK, BRK.B)) shareholders earlier this year, Buffett said many large public companies treat admitting mistakes as a "taboo" and called delaying the correction of errors ...