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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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The nitrogen in our DNA, the calcium in our teeth, the iron in our blood, the carbon in our apple pies were made in the interiors of collapsing stars. We are made of starstuff.
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You have to know the past to understand the present.
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One of the greatest gifts adults can give – to their offspring and to their society – is to read to children.
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Science is a way to not fool ourselves.
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Not explaining science seems to me perverse. When you’re in love, you want to tell the world.
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All civilizations become either spacefaring or extinct.
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Be grateful everyday for the brief but magnificent opportunity that life provides.
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If we ruin the earth, there is no place else to go.
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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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