Two equally qualified job seekers apply for the same job.
The hiring manager gives them a written test to determine which one to hire.
Both score nine out of 10 on the test; however, the manager decides to hire the first applicant.
The rejected applicant asks, "We both got nine questions correct. May I ask why you decided this way?"
"Your fellow applicant wrote 'I don't know' for question five. You wrote, 'Neither do I.'"