Riddle: A man in a restaurant notices that there is a fly in his coffee and calls the waitress. He asks her nicely to bring him another cup. The man takesa sip and immediately shouts out, “Hey, this is the same cup of coffee!” How did the man know it was the same cup of coffee!
Answer: 1. .The waitress hasn’t yet replaced his cup of coffee; or
2. He drank his old cup of coffee despite have ‘another cup’ brought to him.