At a weekend Sherlock Holmes and Dr. Watson went camping in a tent. In the evening, as they were getting ready for bed, Sherlock says ...
- Look up at the sky, dear Watson. What do you see?
- I see stars and their constellations. I see the Little Dipper and a the Plough.
- Good. What can be concluded for this observation?
- The weather will be fine tomorrow ... answered Watson.
- No, you dummy. Our tent has been stolen from us.