The Elephant in the Room
Q. I’m the size of an elephant, but I weigh nothing. What am I?
A. An elephant’s shadow!
Q. There is a house with four walls. All of the walls are facing south. A bear is circling the house. What color is the bear?
A. White. If all walls of the house are facing south, the house must be on the North Pole, so the bear is a polar bear.