If you've existed for any amount of time, especially in the internet-o-sphere of self-diagnostic quizzes and meme-able knowledge nuggets, then you've probably heard of the so-called "10,000-hour rule.

Academic fight! Malcolm Gladwell's popular "10,000-hours rule" was debunked in a Sports Illustrated writer's new book, so Gladwell defended his piece by accusing the author of creating a "straw man." ...