Sherlock Holmes and John Watson are camping on a case they are investigating. After putting up the tent, having a good dinner and a bottle of wine, they go to sleep.
In the middle of the night, Holmes nudges his faithful friend.
“Watson, look up at the sky and tell me what you see,” Holmes whispers, shivering.
Watson opens one eye and replies groggily, “I see millions and millions of stars, Holmes.”
“Yes!” Exclaims Sherlock Holmes. “And what do you deduce from this?”
John Watson sits up straight, rubs his eyes, and ponders. “Hmm. It means that there are millions of galaxies and potentially billions of planets. With so many billions of stars like our Sun, there is a high probability that somewhere in the Universe, many of these stars have Earth-like planets in orbit with them. Assuming that Earth is typical, some may have intelligent life. It means, Holmes, that we may not be alone in the cosmos. What did you deduce?”
Sherlock Holmes is silent for a moment. “Quite,” he replies, “although my initial thought was that clearly someone has stolen our tent!”