Rene Descartes' most widely read work is his ''Discourse on Method'' (in French, ''Discours de la methode''), published in 1637. There Descartes sets forth four rules for discovering knowledge:
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* (1) accept as true only what can be proven
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* (2) solve problems in a systematic manner, part-by-part
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* (3) proceed from simple to more complex issues
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* (4) finally, review everything completely to ensure that nothing was left out
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Descartes established a metaphysical basis for his philosophy, that all philosophical propositions derive from a self-evident certainty of the mind, as in "I think therefore I am."
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Articles:
*[https://plato.stanford.edu/entries/descartes-epistemology/ Descartes’ Epistemology], Stanford Encyclopedia of Philosophy
*[https://plato.stanford.edu/entries/descartes-epistemology/ Descartes’ Epistemology], Stanford Encyclopedia of Philosophy