Still, it could be even higher than 50% wrong, since sometimes the most capable people underrate their ability: http://en.wikipedia.org/wiki/Dunning%E2%80%93Kru

Still, it could be even higher than 50% wrong, since sometimes the most capable people underrate their ability: http://en.wikipedia.org/wiki/Dunning%E2%80%93Kruger_effect http://en.wikipedia.org/wiki/Dunning%E2%80%93Kruger_effect