Two young engineers apply for a single position at a computer company. They both have the same qualifications. In order to determine who gets the job, the manager gives them a written test.
When completed, the manager notes they have only one question wrong, but says to one applicant: “Thank you for applying but we have based our decision not on the correct answers, but on the question you missed,” says the manager.
The rejected applicant says: “And just how can one incorrect answer be better than the other?”
“Simple,” says the manager. “Your fellow applicant put down on question five: ‘I don’t know.’ You put down, ‘neither do I’.”