Rene Descartes 1596-1650 Rene Descartes 1596-1650

V. The Order of Systematic Attack:Class 1:Senses Non-sensory.Class 2:The Dreamer Argument:How do I know that I’m not just dreaming?The fact that we dream gives us reason to doubt that the external world exist at all.Does the dreamer argument undermine the existence of the eternal world at all?Class 3: The Demon Argument.Does the demon argument cast doubt on tautologies, basicmathematics, physics, medicine, fundamental convictions ofknowledge).The demon could be tricking us (even 2+3=5).37