吃东西仅仅是达到目的的一种手段，还是吃东西的乐趣本身就是目的?你如何决定你吃什么，为什么这很重要?约翰和肯对这个问题有很多看法，专家迈克尔·波伦也加入了进来。波伦解释了5号州际公路上的饲养场和机械化土豆农场如何改变了他对食物的看法。我们大多数人都知道世界上有许多饥饿的人，但波伦解释说，问题不在于缺乏食物——每天生产的食物足够每个人摄入3000卡路里。相反，问题在于分发和可用性。波伦还解释了为什么廉价食品并不像看上去那么便宜，并预测廉价食品时代是一种反常现象，将很快结束。

John raises a concern: can you be ethical about your food and not lose the pleasure of eating? Pollan assures him that thinking about food does not negate the pleasure of eating—on the contrary, such thinking increases it. Callers raise concerns of their own, wondering whether the world could be fed under a sustainable system, whether the Chinese have the right mind set about food, and whether everybody should be required to kill a cow. Pollan makes a suggestion to everyone with a front lawn, and John has a few things to say about the idea of a giant chicken breast in Kansas.

Ken wraps up the discussion with the question of whether we’re really wise enough to improve upon nature. Pollan argues that yes, we can improve upon nature, but a little epistemic humility is in order. Find out what public health officials got wrong, how your mindset can affect the calories you derive from your food, and why our knowledge of nutrition today can be compared to our knowledge of surgery in 1650.

• 漫游的哲学记者(寻找3点44分):哲学谈话记者朱莉·纳波兰向我们介绍了一个新词:土食者，他们中国伊朗亚洲杯比赛直播只吃自家周围100英里范围内种植的食物。她与一个在这方面走得更远的社区进行了交谈，这个社区只消费他们所在街区内生产的食物。They explain why they do it, what the result has been, and how they solved the problem of acquiring wine.