Because drawing a perfect circle is impossible for any human.
One life
Within 3 hours they can train a man to stand at the side of a pool and feed them fish!
There were two Canadians and an American. They put letters in a hat and drew. They got "C-eh", "N-eh", "D-eh". The American didn't know what was going on, but he relayed the message. I know i need to work on my execution.
Because they don't have any rulers.
Michael
About four beers
Nobody can.