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Carl Sagan - Except in pure mathematics, nothing is known for certain (although much is certainly false).
  • Carl Sagan
    Carl Sagan
    American astronomer, cosmologist, astrophysicist and author 1934-1996
    Carl Sagan
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    Except in pure mathematics, nothing is known for certain (although much is certainly false).
    Source: Demon-Haunted World: Science as a Candle in the Dark (2011) 51
Except in pure mathematics, nothing is known for certain (although much is certainly false). by: Carl Sagan
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Except in pure mathematics, nothing is known for certain (although much is certainly false).
- Carl Sagan
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