“I doubt, therefore I think, therefore I am.”

—  René Descartes

Variant: Dubito, ergo cogito, ergo sum.

(English: "I doubt, therefore I think, therefore I am")

Original

Cogito, ergo sum.

Last update June 3, 2021. History

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René Descartes 47
French philosopher, mathematician, and scientist 1596–1650

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