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Arrogance is a disruptive personality characteristic whether the individual is an academoc or self-taught, and no one likes a know-it-all of any type. However, the behaviors you describe are extremely common among gifted and talented individuals, and are part of the reason that such individuals often struggle in the general student population (and real life). Often that talent, enthusiasm, and zest for sharing knowledge that these people possess is interpreted as arrogance. It's no excuse for the behavior - clearly quirky talented types must live in society - but it does mean that the education system should account for these individuals and help them down the road. But it doesn't. The system fails miserably in this regard, and the author of this article needs to realize he is part of the problem.