So it's true that Ale knows that at least one person in the room has a pink hat on their head.

所以艾尔确实知道,至少有一个人戴着粉色的帽子

耶鲁公开课 - 博弈论课程节选

Well I'll reveal the facts now: that in fact Ale knows that Kaj has a pink hat on his head.

我已经告诉你们了,艾尔只知道卡佳戴着粉色帽子

耶鲁公开课 - 博弈论课程节选

The Essex stood half over the other prophet as if it were pleased to guard what it had finally brought down. The man didn't look so much like Haze lying on the ground on his face without his hat or suit on. A lot of blood was coming out of him and forming a puddle around his head.

埃塞克斯看着这个先知，好像很高兴地守卫着,自己撞倒的这个人，这个男人看起来与海斯并不相像,没有戴着帽子或穿着西装趴在地上，一大堆血,从他的体内涌出，在头部附近形成了一个水坑状的东西。

耶鲁公开课 - 1945年后的美国小说课程节选

And it's true that Kaj knows that Ale has a pink hat on his head.

而且卡佳也知道艾尔戴着粉色的帽子

耶鲁公开课 - 博弈论课程节选

But notice that Ale doesn't know the color of the hat on his own head.

注意一下,艾尔不知道他头上的帽子是什么颜色

耶鲁公开课 - 博弈论课程节选

Here's a hat on Ale's head, and here's a hat on Kaj's head.

一个给艾尔,一个给卡佳

耶鲁公开课 - 博弈论课程节选

So again, they both know that someone in the room has a pink hat on their head: it is mutual knowledge that there's a pink hat in the room.

但是他们都知道,至少有一个人戴着粉色帽子,至少有一顶粉色帽子是相互知识

耶鲁公开课 - 博弈论课程节选

Here is a fact, so is it common knowledge that -- is it common knowledge that at least one of these people has a pink hat on their head?

我这样说这是共同知识吗,至少有一个人戴着粉色的帽子,这是共同知识吗

耶鲁公开课 - 博弈论课程节选