The main thing is, "so-and-so proved that" or "he showed that" or "they demonstrated scientifically that" refer to processes that can't convey certainty. Even i

The main thing is, "so-and-so proved that" or "he showed that" or "they demonstrated scientifically that" refer to processes that can't convey certainty. Even in mathematics there's no certainty because mathematicians are fallible and someone may eventually find a flaw in a proof.