This puzzle has had significant discussion recently: http://news.ycombinator.com/item?id=1652127 http://news.ycombinator.com/item?id=1652127 http://news.ycomb

This puzzle has had significant discussion recently: http://news.ycombinator.com/item?id=1652127 http://news.ycombinator.com/item?id=1652127 http://news.ycombinator.com/item?id=1891212 http://news.ycombinator.com/item?id=1891212 http://news.ycombinator.com/item?id=834599 http://news.ycombinator.com/item?id=834599