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> If you can’t explain you know nothing.

Strongly agree. And I'll raise you: if you can't explain in simple, plain language that a 12-year-old could understand, then you are not enlightened.

I concede that some subjects are intrinsically complex; e.g. the cosmological history of the Universe. But a large part of the reason that topic is complex is because it's not settled; we haven't got to the bottom of it, so there are loads of unanswered questions. How can you explain cosmological inflation in language a 12-year-old could understand? Well, I can't explain it to myself, so I sure as hell can't explain it to a 12-year-old.



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