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Ask HN: What facts did you learn that you can never un-know?

6 points by motohagiography ↗ HN
Looking for examples of relationships in the world where once you see or learn them, you cannot un-see them whenever you encounter them.

To me more advanced ones include things like interest compounding, standard negotiation and sales tactics, pareto distributions, and survivor bias, but they could be as simple as proverbs, heuristics, similes and metaphors, and even poetic descriptions.

What are other examples of these frames that, once you view the world through them, they stick on your short list of go-to mental reference points?

6 comments

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greenyoda
That humans are capable of both great kindness and unspeakable evil.

That a person's life can change forever in a split second.

warent
Digestion in the stomach is very far from a simple passive process. The stomach is always violently compressing itself, smashing up and "chewing" food that you ate.

This forever altered my world view on stomachs.

ddingus
One basic definition of wealth is time. Wealthy people purpose most of their time. Poor people have most of their time purposed for them.