+Rene Descartes was a French [philosopher](/wiki/philosophy) and mathematician, widely regarded as the father of modern [Western Philosophy](/wiki/western_philosophy). His famous declaration, "I think, therefore I am," underscores his pursuit of foundational truth through [reason](/wiki/reason) and systematic doubt.
+## See also
+- [Rationalism](/wiki/rationalism)
+- [Dualism](/wiki/dualism)
+- [Epistemology](/wiki/epistemology)
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