Ladders

First the people had to invent ladders. No one had ever seen a ladder. Once they had ladders they invented walls to climb over. Soon they realized it took two ladders to climb a wall. One to climb up one side—one to climb down the other. People would ascend one side of the wall, descend the other side of the wall, and then walk away, leaving the ladders behind. That is why there are so many ladders in the world. The ladders are picked up and stored in an enormous warehouse. Scientists have proposed attaching all the ladders, one on top of the other, creating an elevator into outer space. Some people want to destroy all the ladders. Others want to destroy the walls. Others say that someday we are going to need all the ladders in the world.