The subject may appear an insignificant one, but we shall see that it possesses some interest; and the maxim “de minimis lex non curat” [the law is not concerned with trifles] does not apply to science.
In science it often happens that scientists say, 'You know that's a really good argument; my position is mistaken,' and then they would actually change their minds and you never hear that old view from them again. They really do it. It doesn't happen as often as it should, because scientists are human and change is sometimes painful. But it happens every day. I cannot recall the last time something like that happened in politics or religion.
(1987) -- Carl Sagan
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