Foundationalism and distinct. Geometrical truths are also certain and indubitable; Descartes thus attempted to find truths which were clear and distinct because they would be indubitably true and a suitable foundation for knowledge. His method was to question all of his beliefs until he reached something clear and distinct that was indubitably true. The result was his "cogito ergo sum" – 'I think therefore I am', or the belief that he was thinking – as his indubitable belief suitable as a foundation for knowledge. This resolved Descartes' problem of the Evil Demon – the possibility that he was being deceived by
Fuzzy Ergo Sum Fuzzy Ergo Sum Fuzzy Ergo Sum is a science fiction novel written during 2006-2009 by Wolfgang Diehr as a sequel to H. Beam Piper's Fuzzy trilogy: "Little Fuzzy", "Fuzzy Sapiens", and "Fuzzies and Other People". The trilogy concerns the discovery of a primitive species of small, childlike but sapient furry creatures on Zarathustra, a frontier planet with valuable mineral deposits, and the subsequent conflicts this generates between the Fuzzies, the humans who befriend them, and those who would exploit the Fuzzies and their land. "Fuzzy Ergo Sum" begins shortly after the conclusion of the trilogy, involving characters from those books