How many hours does it take to master a skill? Well, if you read Malcolm Gladwell's bestselling book Outliers, you'll remember that "10,000 hours is the magic number of greatness." This 10-000 Hour Rule is a heavily cited pedagogy in the world of lifelong learning. But I have some good news! It turns out that this is not what the research shows. The 10,000 hour rule is wrong. Put differently: For
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