…showed first 75 words of 606 total…

…showed last 75 words of 606 total…revolutionary thinker : contributed to understanding of knowledge Method of Universal Doubt objective: to systematically think calmly and clearly about all that you consider knowledge & Doubt it. : to systematically doubt everything.... might find something exempt of doubt, then you have the thing which you can build back up as a reliable structure of knowledge. Knowledge: as inverted triangle: bottom philosophy if real work of human mind is to understand the world, must establish perfect unshakeable truths