Rene Descartes · Philosophy
Descartes resolves to doubt everything that can possibly be doubted - the senses, the external world, even mathematics - in search of one belief so certain that no doubt can touch it, on which all knowledge can be rebuilt.
You learned that Descartes used radical doubt as a method: he set aside every belief that could possibly be false, hoping to reach one indubitable foundation. Explain why he doubted, and how far the doubt was meant to go.
Leads to Al-Ghazali.
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