17th CenturyPhilosophers
Descartes: Meditations on First Philosophy
Six days of thinking: doubt everything, find what can't be doubted, and rebuild knowledge from there.
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Pass with 3 right answers, the last 2 in a row. Each right answer earns 3 XP.
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Builds on
Nothing before it: a good place to start.
Leads to
This is one of the top rungs of The Age of Reason.