Also don't forget Godel incompleteness, if u r a proof nerd 
Axioms of Euclid; axioms of Riemann: different axioms, different range of convenience; both useful as tools in the world.https://twitter.com/jamesagreenleaf/status/899498256492875776 …
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Riemann’s axioms ultimately resulted in a failure to correctly represent the observed physical universe (4/5 of matter & energy is missing).
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well, doesnt incompleteness give us good grounds to think that 100% epistemological certainty is unable to be achieved?
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