Why Smart People Are Stupid
Posted by Jonah Lehrer
Here’s a simple arithmetic question: A bat and ball cost a dollar and ten cents. The bat costs a dollar more than the ball. How much does the ball cost?
The vast majority of people respond quickly and confidently, insisting the ball costs ten cents. This answer is both obvious and wrong. (The correct answer is five cents for the ball and a dollar and five cents for the bat.)
Research Shows That the Smarter People Are, the More Susceptible They Are to Cognitive Bias : The New Yorker