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Sextus Empiricus
(flourished c. 200 - )
Greek philosopher.
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Science Quotes by Sextus Empiricus (1 quote)
Democritus sometimes does away with what appears to the senses, and says that none of these appears according to truth but only according to opinion: the truth in real things is that there are atoms and void. “By convention sweet”, he says, “by convention bitter, by convention hot, by convention cold, by convention colour: but in reality atoms and void.”
— Sextus Empiricus
Against the Professors, 7, 135. In G. S. Kirk, J. E. Raven and M. Schofield (eds.), The Presocratic Philosophers: A Critical History with a Selection of Texts (1983), 410.
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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