The scientific method is not infallible. Neither is democracy. Neither is capitalism. We cannot be so arrogant as to think that in our short time here, we’ve already found out all there is to know. I think we could do better if we weren’t so afraid of trying.
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Indeed. Everything of which we say "We know this" is only ever "best we know at the moment". And, yes: everything is improvable. Not an article of faith: it's a consequence of physics and epistemology. See, e.g.: "The Beginning of Infinity" by David Deutsch.
