It is not fair challenging the nature while we all know how it works. (policybazaar.com)
The county - fair challenge of guessing how many gum balls are in a jar is far more than just a game for kids; understanding how objects pack into a particular volume is a fundamental problem of physics and engineering. (discovermagazine.com)
New Game Plus is a reasonably fair challenge, as players can carry over all weapons, outfits, abilities, XP, and inventory items into the harder difficulty setting. (egmnow.com)