The increase in weight of teenagers, for example, is not explained by cognitive biases, but by sharp declines in the cost of fast foods, and the development of Internet and other sedentary games.

• 举个例子，青少年体重的上升的原因并不能用认知偏见来解释，而应该是快速食品成本的急剧下降以及互联网和其它需要久坐的游戏的发展造成的。