ELI5

That’s the test of how much you understand a thing. Can you explain it to someone else like they are a 5-year-old?

Can you make it simple, but not simpler?

‘But how do I communicate how smart I am?’, you may ask. Do that by making what you say simple enough to understand.

That something is made simple doesn’t mean it is easy.

This is the most incredible form of cognitive prowess. Making something that was complicated very simple.