Rene Descartes's philosophical method was based on a clear authority structure that one already knows is reliable.

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Descartes's philosophical method, famously encapsulated in his statement "Cogito, ergo sum" ("I think, therefore I am"), was based on doubt and systematic skepticism, not on an unquestioned authority structure. He sought to discard all beliefs that could be doubted, aiming to find a foundation for knowledge that was absolutely certain.

Rene Descartes's Philosophical Method Was Based on a Clear Authority