An Englishman, Irishman and Scotsman apply for a job as security guard.
When they arrive for the interview, they are told that they must take a test to assess their ability of observation.
The Englishman is taken into a room and told to sit in a chair and look the interviewer in the eye's and tell him what he see's.
The Englishman looks him in the eye's and says you have one ear up and one ear down.
The interviewer says very good, ten out of ten.
The Scotsman is told to do the same, and also tells him he as one ear up and one ear down.
Again the interviewer says very good, ten out of ten.
The Irishman is taken into the room and told to sit and look the interviewer in the eye's and tell him what he see's.
The Irishman looks him in the eye's for about 5mins then says you wear contact lenses.
The interviewer says, how do you reach that conclusion.
The Irishman says, you couldn't wear glasses with ears like that.