First principle foundationalist system of philosophy. He used the "method of doubt", now called Cartesian doubt, to systematically doubt everything he could possibly doubt, until he was left with what he saw as purely indubitable truths. Using these self-evident propositions as his axioms, or foundations, he went on to deduce his entire body of knowledge from them. The foundations are also called "a priori" truths. His most famous proposition is "Je pense, donc je suis." ("I think, therefore I am", or "Cogito ergo sum") Descartes describes the concept of a first principle in the following excerpt from the preface to the "Principles
Mr. Cogito book, invites a range of various interpretations, including cultural and historical ones. True to the Cartesian overtones of his name, Mr. Cogito often reflects on life and the world, providing the reader with the thoughtful statements. Coming from an Everyman, they attain a range of universal meanings. The first poem in the collection is entitled "Pan Cogito obserwuje w lustrze swoją twarz" ("Mr Cogito Looks At His Face In A Mirror"). A poem about aging, it poses questions about the limits of individual freedom. The second, "O dwu nogach Pana Cogito" ("On Mr. Cogito's Two Legs") concerns the duality of