Descartes' Method of Doubt
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State
Descartes' method of doubt: to find an unshakable foundation, treat any belief that can be doubted as if it were false.
Show
In the Meditations he razes the building to its foundations—senses, body, world—to see what, if anything, survives.
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The doubt is a tool, not a lifestyle. Descartes doubts in order to rebuild.