Everyone knows from calculus that if you're trying to find a function about which you know only the derivative, you can always add a constant to one person's answer without changing anything.

学过微积分的人都知道,如果你想根据已知的导数,求出其原函数,你总是可以给某人的答案,随便加一个常数,且不影响结果

耶鲁公开课 - 基础物理课程节选

but everyone knows, like, which one's, ah... which societies exist and who is in them, just things like that.

但是每个人都知道这种社团的存在，也知道社团的成员是谁，这些事情都不是秘密。

耶鲁对比哈佛 - SpeakingMax英语口语达人