John and Dave were in a mental institution. Both had been there for some time undergoing treatment, and both were now considered to be ready for discharge. However, before any patients were finally discharged the doctors always insisted on giving them one last test of two simple questions.
John was called into the doctor's office first and told that he'd be discharged if he answered the questions correctly. The doctor said, "John, what would happen if I poked out one of your eyes?"
John said, "I'd be half blind."
"That's correct. What if I poked out both of your eyes?"
"I'd be completely blind." The doctor got up, shook his hand and told him he was free.
On John's way out, as the doctor filled out the paperwork, John mentioned the exam to Dave. He told him what questions were going to be asked, and told him the answers. Dave was called in. The doctor went through the formalities and then suspecting collusion between the two, asked, "What would happen if I cut off one of your ears?"
Dave, remembering what John said was the correct answer, he said, "I'd be half blind."
The doctor looked a little puzzled, but went on. "What if I cut off both of your ears?"
"I'd be completely blind." Dave answered.
"Dave, can you explain how you'd be blind?"
Dave, nonplussed, thought carefully for a minute, then replied……..
"My hat would fall over my eyes."
