n.手指头的倒拉刺
I have a hangnail, and my heart is-what? 我指甲旁有个肉刺，我的心- 什麽？
It's an environment that is at once trashy and highly exacting: every hangnail a sin, every eye-bag a crime. 但现在我更喜欢自然一些”凯利又补充说“很多人认为人们不应该去做整容，而我却不是这么想的，我觉得每个人都可以做自己想做的事情”。
If one of your pros is “will make a million dollars” and one of your cons is “might get a hangnail”, they don't exactly cancel each other out. 例如，有个好处是"可以挣到百万美金"，有个坏处是“可能手指头会有倒刺”，这样的利弊是无法对等，相互抵消的。
If one of your pros is “will make a million dollars” and one of your cons is “might get a hangnail”, they don’t exactly cancel each other out. 这就是说任何复杂的问题，当影响其得因素平均超过7个时，清醒的头脑就容不下了，就影响了有效的思考运作，结果就是不能很好的作出选择了。
