非常瞎掰的一篇文章。但写作、演讲确实经常都强调三个点、三个方面。为什么是三,而不是二、四、五?很多事情凑成三个方面,不多不少:三只小猪、三个火枪手?

The rule of threes states that things that come in threes are funnier, more satisfying, or more effective than other numbers of things.

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