Sherlock Holmes and Dr Watson are out camping. Middle of the night, Holmes wakes Watson and says, "Look up. Whaddyou see?"
Watson says, "Stars."
Holmes says: "What d'you deduce from that?"
Watson says: "The weather tomorrow will be beautiful, Venus is rising in Capricorn, it's about three in the morning, we're facing southeast, creation is vast and we are very small. Why? Whad'you deduce?"
Holmes says: "Watson, you idiot, someone stole our tent."