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John Derbyshire
(3 Jun 1945  )
EnglishAmerican novelist and science writer whose books include mathematical topics in Prime Obsession and The Unknown Quantity, an interest which follows from having a batchelor's degree in mathematics. In other writings, his extreme opinions expressed in a webzine led to his termination as a contributor to the conservative National Review.

Science Quotes by John Derbyshire (1 quote)
Nonmathematical people sometimes ask me, “You know math, huh? Tell me something I’ve always wondered, What is infinity divided by infinity?” I can only reply, “The words you just uttered do not make sense. That was not a mathematical sentence. You spoke of ‘infinity’ as if it were a number. It’s not. You may as well ask, 'What is truth divided by beauty?’ I have no clue. I only know how to divide numbers. ‘Infinity,’ ‘truth,’ ‘beauty’—those are not numbers.”
— John Derbyshire
From Prime Obsession: Bernhard Riemann and the Greatest Unsolved Problem in Mathematics (2003), 16.
See also:
 Prime Obsession: Bernhard Riemann and the Greatest Unsolved Problem in Mathematics, by John Derbyshire.  book suggestion.
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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