Ewan MacKenna: Cheating is part of human nature

But do the people behind the testers want to get the cheats?

A fortnight ago, the International Olympic Committee announced it had retested 454 samples from the Beijing Games and found 31 new cheats Pic: iStock

Two kids are playing a game of Monopoly when one goes to refill a glass of Coke. Does the other reach into their mate’s money and throw an extra house on their street?

A graduate is applying for a job when they notice that the boss is friends with their parents - do they try to gain an advantage and get a call put in?

An athlete spends a lifetime reaching the cut-throat ...