Sherlock Holmes and Dr. Watson go camping, and pitch their tent under the stars. During the night, Holmes wakes his companion and says: 'Watson, look up at the stars, and tell me what you deduce.'
Watson says: 'I see millions of stars, and even if a few of those have planets, it's quite likely there are some planets like Earth, and if there are a few planets like Earth out there, there might also be life.'
Holmes replies: 'Watson, you idiot. Somebody stole our tent.'"