Two young engineers applied for a position at a computer company. They had the same qualifications. In order to determine which individual to hire, the applicants were asked to take a test given by one of the company's department managers.

Upon completion of the test, it was determined that both men missed only one of the questions. The manager went to the first applicant and said, "Thank you for your interest, but we've decided to give the job to the other applicant."

"But why? We both got nine questions correct," said the rejected applicant.

"We have based our decision not on the correct answers, but on the question you missed," said the manager. "Your fellow applicant put down for question No. 5 'I don't know the answer.' And you put down, 'Neither do I.'"