Practice, practice, practice. The theory goes that with enough repetition, time, and hard work, anyone can become the master of their craft. The 10,000-Hour Rule was derived from performance research and then Malcolm Gladwell made it famous everywhere from sports to investing. But best-selling author David Epstein joins the show to put the theory to the test. He explains why the concept of 10,000. hours to mastery is so appealing, and so wrong.

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