To give someone a single answer so that they can derive more answers
Used to indicate that one can infer many things after receiving just one piece of information
Neutral
凡事能举一反三，正是他学习快速的原因 | Fánshì néng jǔyīfǎnsān, zhèng shì tā xuéxí kuàisù de yuányīn
He can quickly infer many things after learning just one small bit of information. That's why he is able to study so quickly.
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现代汉语的句型是有限的，掌握了句型，我们就能举一反三，造出各种各样的句子来 | Xiàndài hànyǔ de jùxíng shì yǒuxiàn de, zhǎngwò le jùxíng, wǒmen jiù néng jǔyīfǎnsān, zào chū gèzhǒnggèyàng de jùzi lái
The sentence structure of modern Chinese is very limited, so once we have a good understanding of it, we can build on that understanding to create all kinds of sentences
[Source]
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一隅三反 (yī yú sān fǎn)
举一赅百 (jǔ yī gāi bǎi)
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《论语》(Lún Yǔ), or the Analects of Confucius
This comes from a line in the Analects of Confucius, as mentioned in the origin section. In the Analects, Confucius says to his students, "If I were to point out one corner of a room, you should be able to find the other corners of the room by yourself. If you cannot do this, I will not be your teacher any longer." Eventually, this became 举一反三.