Ultra Vires Quotes (1 quote)
I intentionally left the question of the origin of life uncanvassed as being altogether ultra vires in the present state of our knowledge.
Letter (28 Mar 1882) to George C. Wallich—which Sir Gavin de Beer thinks was the last letter which Darwin is known to have dictated and signed before his death in 1882. In Gavin De Beer, 'Some Unpublished Letters of Charles Darwin', Notes and Records of the Royal Society (1959), 14, As quoted and cited in Lim Ramon, Self And The Phenomenon Of Life: A Biologist Examines Life From Molecules To Humanity (2017), 12-66.

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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