相关系数的可能误差不是一个固定的量，而是取决于样本的大小。

我不必完美。我只需要尽我所能。

每一个创造的行为首先都是一个破坏的行为。

Give me a dozen healthy infants, well-formed, and my own specified world to bring them up in and I'll guarantee to take any one at random and train him to become any type of specialist I might select—doctor, lawyer, artist, merchant-chief and, yes, even beggar-man and thief, regardless of his talents, penchants, tendencies, abilities, vocations, and race of his ancestors.