Once a man named George was walking along a road with his friends and came to a rusted old truck. They tried driving the truck, but it wouldn't move because parts of it had gotten wedged into the road and into other parts of the truck. With some patience and work, George and his friends removed the parts that were in the way, and soon they had a simple, flatbed truck that took them all over the place, and anyone could ride on it.
After a long while, people began to ride the truck not because it got them anywhere, but because they liked the idea that anyone could ride on the truck. Some people who liked to fly added wings to it. Then someone who liked boating replaced the steering wheel with a rudder. A skier replaced two of the wheels with skis, while a biker installed a bike wheel. Pretty soon, the truck was such a mixture of all kinds of vehicles that no one could even describe it. And it never went anywhere.