Known knowns and unknown unknowns

long0

As we know, there are known knowns; there are things we know we know. We also know there are known unknowns; that is to say we know there are some things we do not know. But there are also unknown unknowns—the ones we don’t know we don’t know.

- Donald Rumsfeld.

已知的不可怕，可怕的是未可预见的无知！UR devaluation is coming. Winter is coming, too

ps. 转正开森。
来自: Android客户端

静思夜

开森的话不是应该发点钱
或者爆个照？

yulingli

我在做这种hostugo的头发，你估计要等会了
来自: Android客户端
hosthair.jpg

魔法大师

卧槽

lucky_chu

发生什么了？

dymdymcom

If winter is really coming, then we will need to get as much UR points as we could!! 多申多earn多spend