Thats why I didnt use the word proof... "Proof" is only useful is philosophy and mathematics. There is no "proof" of things in science, thats not how science works. There is no proof that the earth is round, just a mountain of evidence. There is no proof that atoms have positive and negative charges, just a mountain of evidence.
Like I said above - "All scientific theories are always tentative because all scientists know we dont know everything." All scientific theories are tentative; evolution, the round earth, charged particles. To say that any one of those is "proved" is to say that the theory is not tentative which contradicts the very nature of science.
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