So a mathematician, an engineer and a psychologist had a bet with a farmer... So a mathematician, an engineer and a psychologist had a bet with a farmer. It was 'Who could surround the most area using as little as much fences possible' So the psychologist surrounded a farm that already has fences surrounding it, he told the mathematician and the mathematician grinned. The mathematician fenced half of the earth and claimed he surrounded half of the earth. Then they asked the engineer, the engineer laughed. The engineer built the fences around himself and claimed he was at the outside The engineer won