The reason I chose Alpha, regardless of what my partner chose, I think there would be better outcomes than choosing Beta.
我选α是因为不管我对手选什么,我选α得到的成绩总会比选β的要好
And again, we're not saying choosing 2 beats choosing 1, 2 wins against 1 or 9 wins against 10.
我们不是说选立场2会击败选立场1的,选立场2能赢立场1的,或者选立场9能赢选立场10的
I have mine selected not to that sound but to Mozart, so I hear this sound on my telephone.
我没选乱七八糟的那些,而是选了莫扎特的,我听到了我手机的铃声
And the claim is that when you choose this, in order to justify your decision, you denigrate the one you didn't choose.
对这个行为的解释是,当你选这一粒时,为了表明你的选择是正确的,你会贬低第一次没选上的那粒。
So it has two books that we don't include and excludes one that we do include.
所以有两本书没有被选上,并排除了选上的一部。
The payoff of 2 against 3 is all the people at 1, all the people at 2, so it's 20%.
如果对手选3而我选2我会得到,立场1和2的全部选票,一共20%
Please choose a rhythm for excerpt one you can choose rhythm A which is or you could choose rhythm B So I'm about to play a piece. It's by Chopin.
请选一个和你听到的相符的节奏,你可以选节奏甲,也可以选节奏乙,我现在要弹一段,肖邦的曲子
If I choose Alpha and she chooses Alpha to get 0; Beta she gets -1. Alpha is better.
如果我选α,她选α她得0,选β她得-1,选α更好
And they said, suppose we know we're going to be paired together, I'll choose Beta if you choose Beta. Would that work?
他俩这么商量的,咱俩会被分到一组,你要是选β我也选β,这会成功吗
it's going to be: 1 minus the probability they'll choose Right times 1, plus the probability that they choose Right times 4.
方程是,1减对手选右的概率再乘以1,加上对手选右的概率乘以4
So not only was he choosing a position close to the Conservatives: he was choosing exactly their position.
他不只是选了一个临近保守派的立场,他选的就是一个保守派的立场
What probabilities are associated with thinking it's twice as likely they're going to choose Left than Right?
那么在选左是选右的可能性的二倍时,选择每个策略的概率是多少呢
It's still I'm choosing Alpha and Beta, my pair is choosing Alpha and Beta, and the grades are the same as they were before.
还是我选α和β,我对手选α和β,成绩的评判和之前是一模一样的
Why did they allow some books in and other books not in?
为什么有些书被选上而有些没被选上?
0%: the person at 2 is going to get all the ones at 1, and all the ones at 2; and 3 will get everything else.
0%的选票,选立场2的人会得到,立场1和2的全部选票,选立场3的候选人会得到剩下的选票
If I choose 1 against 3, what share of the vote do I get?
如果我选立场1,对手选立场3,我能获得多少选票
If I choose Beta, if she chooses Alpha she gets 3; Beta 1.
如果我选β,她选α得3,选β得1
If the pair chooses Alpha and she chooses Alpha, then she gets 0.
如果对手选α她也选α,她得到0
We say that my strategy Alpha strictly dominates my strategy Beta, if my payoff from Alpha is strictly greater than that from beta, regardless of what others do."
无论别人怎么选,如果选α得到的结果严格优于β,那么α相对于β是个严格优势策略"
Okay, so you chose Alpha right? So why did you choose Alpha?
你选了α对吧,你为什么要选α呢
If the pair chooses Alpha and she chose Beta, she gets -1.
对手选α她选β,她得到-1
Beta is better against Beta. There's no dominance going on here.
她选β我也应该选β,这次没有优势策略
So let's have the Beta's up again. Let's see the Beta's.
请选β的再举下手,看看有谁选了β
So if the other person's choosing Right with probability 0, that's the same as saying they're going to choose Left, and if I chose Middle against Left, I get what?
如果对手选右的概率是0,也就是说对手选左,此时我选中的收益是什么
So the payoff from choosing 1, let's start against 2.
我们先看看我选立场1,我们先从选立场2开始吧
And once I know that she's going to choose Alpha, it's clear that I should choose Alpha and get 0 rather than Beta and get -3. So I should choose Alpha also.
一旦我意识到她会选α的时候,很显然我应该也选α来得到0单位效用,而不是选β只得到-3,所以我也选α
It's the safer answer if you can't decide whether or not your opponent's going to choose Left or Right, so you don't have to worry about having a payoff of 0.
当你无法判断你的对手会选左还是右时,选下是较安全的答案,因此你不必担心收益变成0
As we saw before, Alpha is better against Alpha.
就像我们看到的,她选α我最好选α
Similarly, we can see that Right is not dominated, because it does better against Up, than does Left.
类似的,我们也得出右也不是劣势策略,因为参与人I选上时,选右比选左好
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