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Carl Sagan Quote - Except in pure mathematics, nothing is known for certain (although much is certainly false).

Except in pure mathematics, nothing is known for certain (although much is certainly false).

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Certain Except False Mathematics Pure

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Marilyn Monroe Paulo Coelho Abraham Lincoln C. S. Lewis Khalil Gibran Charlie Chaplin Gautama Buddha Isaac Newton

The cure for a fallacious argument is a better argument, not the suppression of ideas.
CARL SAGAN

Argument Cure Ideas Suppression
The truth may be puzzling. It may take some work to grapple with. It may be counterintuitive. It may contradict deeply held prejudices. It may not be consonant with what we desperately want to be true. But our preferences do not determine what’s true.
CARL SAGAN

desperatel Determination Preference Prejudice Puzzle True Truth Want Work
There are as many atoms in one molecule of DNA as there are stars in a typical galaxy.
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Except in pure mathematics, nothing is known for certain (although much is certainly false).
CARL SAGAN

Certain Except False Mathematics Pure
Our ancestors lived out of doors. They were as familiar with the night sky as most of us are with our favorite television programs.
CARL SAGAN

Ancestor Door Family Favourite Live Night Program Sky Television
One of the great commandments of science is: Mistrust arguments from authority.
CARL SAGAN

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The notion that science and spirituality are somehow mutually exclusive does a disservice to both.
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Perhaps the depth of love can be calibrated by the number of different selves that are actively involved in a given relationship.
CARL SAGAN

Depth Different Giving Involvement Love Number Perhaps Relationship
Every star may be a sun to someone.
CARL SAGAN

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If we ruin the earth, there is no place else to go.
CARL SAGAN

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I think the health of our civilization, the depth of our awareness about the underpinnings of our culture and our concern for the future can all be tested by how well we support our libraries.
CARL SAGAN

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We are star stuff harvesting sunlight.
CARL SAGAN

Harvest Stars Stuff Sunlight
We are star stuff which has taken its destiny into its own hands.
CARL SAGAN

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Books permit us to voyage through time, to tap the wisdom of our ancestors.
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A book is made from a tree. It is an assemblage of flat, flexible parts (still called “leaves”) imprinted with dark pigmented squiggles.
CARL SAGAN

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Extraordinary claims require extraordinary evidence.
CARL SAGAN

Claim Evidence Extraordinary One Liner Requirement Science

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