Cartesian doubt is the basis for Descartes' statement, ""Cogito ergo sum"" ("I think, therefore I am"). Methodological skepticism is distinguished from philosophical skepticism in that methodological skepticism is an approach that subjects all knowledge claims to scrutiny with the goal of sorting out true from false claims, whereas philosophical skepticism is an approach that questions the possibility of certain knowledge. Cartesian doubt is methodological. Its purpose is to use doubt as a route to certain knowledge by finding those things which could not be doubted. The fallibility of sense data in particular is a subject of Cartesian doubt. There are several interpretations
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