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ljg-is

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把一个名词或概念写成可使用的理解：先用普通话讲清它是什么、与相邻概念差在哪里，再说明它怎样运作、会改写什么判断，最后给出面对它时的行动抓手。USE WHEN 用户问 X 是什么、怎么理解、意味着什么、为什么重要、以后怎样判断或使用；尤其适合技术概念、制度、产品、角色、方法、规范与实践。NOT FOR 单纯查事实、公式证明、逐步操作教程、纵向因果深挖（用 ljg-think）或母题结构（用 ljg-structure）。

skills/ljg-is/SKILL.md

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# 把一个名词讲到能用

只给定义，读者可能记住了词，却仍不知道怎样认出它。只讲动词，读者又可能知道它做了什么，却不清楚它究竟是哪一类东西、边界在哪里。

`ljg-is` 把两者接起来：名词回答「它是什么」，让概念在认知地图里站稳；动词回答「它怎样起作用」，让概念在现实里动起来。真正完成的理解还要继续走一步：它改写了读者原来的什么判断，下次遇到它时又能怎样行动。

```text
它是什么，和什么不一样？
它靠什么动作产生结果？
知道这一点后，我不再怎样想？
下次遇到它，我先看什么、怎样做？
```

这四个问题是一条理解路径，不是四个正文栏目。文章要像一个人顺着疑惑把事情讲明白，而不是把答案依次填进表格。
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