Rene Descartes - What is Truth and Reality - Episode 4

I like the scope of his argument and this underpins the reach of his mathematics and idea of Science as a system of laws. He seems trapped in some desperate and circular arguements.

http://lessonpeer.com/drhillteach/Rene%20Descartes%20-%20What%20is%20Truth%20and%20Reality%20-%20Episode%204.mp3