"Would you mindtelling me, Doctor," Bob asked ... "how you detect a mental deficiencyin somebody who appears completely normal?"
"Nothing is easier," he replied. "You ask him a simple question which everyone should answer with no trouble. If he hesitates, that puts you on the track."
" Well,What sort of question?"
"Well, you might ask him, 'Captain Cook made three trips around the world and died during one of them. Which one?'
Bob thought for a moment, and then said with a nervous laugh, "You wouldn't happen to have another example would you? I must confess I don't know much about history."
