Blonde Blitz....

A noted psychiatrist was a guest at a blonde gathering, and his hostess naturally
broached the subject in which the doctor was most at ease. "Would you mind telling
me, Doctor," she asked, "how you detect a mental deficiency in somebody who
appears completely normal?" "Nothing is easier," he replied. "You ask a simple
question which anyone should answer with no trouble. If he hesitates, that puts you
on the track." "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?' The
blonde thought a moment, 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."