Answer:
How do you discover something that does not exist?
Twelve pears hanging high, twelve men passing by. Each took a pear and left eleven hanging there. How can this be?
A man wants to buy a used car. He finds a beautiful Buick for $9500, but he buys it without paying a dime. How did he manage this?
What was the longest river in the world before the Amazon River was discovered?
How could all of your cousins have an aunt who is not your aunt?
What is it that makes tears without sorrow. And takes its journey to heaven?