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Personally, I think sleep is important so the brain can rest but maybe that's just cuz I never studied as hard
(losing sleep) as some people did.

There is enough evidence to prove that sleep is good for the brain. You are the living example.

I agree with the study from the NIH:

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2528821/

Don't read it. Just sleep on it.

Yes, I will contemplate this in my dream state.