Fence Building by a Mathematician
One day a farmer called up an engineer, a physicist, and a mathematician and
asked them to fence off the largest possible area with the least amount of
The engineer made the fence in a circle and proclaimed that he had the most efficient design.
The physicist made a long, straight line and proclaimed, “We can assume the length is infinite”, and pointed out that fencing off half of the Earth was certainly a more efficient way to do it.
The Mathematician just laughed at them. He built a tiny fence around himself and said, “I declare myself to be on the outside.”