Carl Sagan Quotes: 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). (Carl Sagan)

Carl Sagan Quotes Pictures

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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