What, if anything, can we know with absolute certainty?  This episode of the egg timer takes a critical look at the answer Rene Descartes gives to this question.  His answer has provided the foundation for the last 400 years of philosophical thought surrounding knowledge.

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Art Attribution: Frans Hals  - André Hatala [e.a.] (1997) De eeuw van Rembrandt, Bruxelles: Crédit communal de Belgique, ISBN 2-908388-32-4.