Taught by people with a lot of knowledge.
https://gyazo.com/c1e47af8ecc72bdecc5cfb30c0a37b2e
False mental model that there are those who are more knowledgeable and those who are less knowledgeable in the world, and those who are more knowledgeable teach those who are less knowledgeable.
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This page is auto-translated from /nishio/知識の多い人が教える. If you looks something interesting but the auto-translated English is not good enough to understand it, feel free to let me know at @nishio_en. I'm very happy to spread my thought to non-Japanese readers.