We used iterative deletion in a relatively abstract setting, or not abstract, rather a play setting last time in which were choosing numbers.

我们在相对抽象的背景下探讨迭代剔除,其实也没那么抽象,比如上一讲,我们做的选数字的游戏

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Or in another social setting, say you're with a friend.

在另一种情况下，假如你跟一个朋友在一起。

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