Can you guess where another classroom is using only yes or no answers?
只回答“是”或“不是”，能猜出另一间教室在哪儿吗？
对方就在屏幕上，你却不知道那间教室在哪个地方。
The other class is right there on the screen, yet you do not know where its classroom is.
更有趣的是，对方不能直接说地名，只能回答“是”或“不是”。
More intriguingly, the other class cannot simply name the place; it can only answer yes or no.
这么短的回答，也能帮你找到答案吗？
Can such a short reply still help you find the answer?
一个2017年建立的eTwinning项目，介绍了这样的猜地点游戏。
An eTwinning project created in 2017 described this kind of location-guessing game.
当时的介绍说，两间教室用Skype联系，通过这些问题猜出对方的位置。
The description at the time said that two classrooms connected through Skype and used these questions to guess each other's location.
eTwinning让不同学校的老师联系，开展共同的项目。
eTwinning connects teachers from different schools to work on shared projects.
想一想下面这个假设的例子：你还不知道对方在哪个国家。
Consider this hypothetical example: you do not yet know which country the other class is in.
你可以先问：“你们在欧洲吗？”
You might first ask, “Are you in Europe?”
如果回答“不是”，欧洲的地点就不在要找的范围里了。
If the answer is no, places in Europe are outside the area you need to search.
如果回答“是”，接下来就可以把问题集中在欧洲。
If the answer is yes, you can focus the following questions on Europe.
对方没有说出国名，但一个回答已经让你少找一大组可能的地点。
The other class has not named its country, but one reply has already removed a large group of possible places from your search.
这和只问一个国家的名字，比如“你们在法国吗？”，不太一样。
That differs from asking about just one country, for example, “Are you in France?”.
后一种问法，如果得到“不是”，只排除了一个国家。
With the latter question, a no rules out only one country.
下一步问什么，可以根据前面的回答来决定。
You can decide what to ask next based on the previous answers.
随着可能的地方变少，问题也可以越来越具体。
As fewer possible places remain, the questions can become more specific.
最后猜一个地名，比一开始随便说名字更有方向。
Guessing a place name at the end gives you more direction than naming places at random from the start.
不过，这只是用来解释玩法的例子，并不是那个项目真实对话的记录。
However, this is only an example explaining the game, not a record of an actual conversation from that project.
这个游戏有意思的地方，是把“不告诉你答案”变成了“一点点给你线索”。
The interesting part of the game is turning not telling you the answer into giving you clues little by little.
原来，一个“不是”，也能告诉你不少东西。
It turns out that a single no can tell you quite a lot.
