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 collection published in Hebert's lifetime. Surprisingly religious, it contains 5 more texts with Mr. Cogito's name in the title. These are: "Pan Cogito a Małe Zwierzątko ("Mr. Cogito and a Small Animal"), "Pan Cogito. Aktualna pozycja duszy" ("Mr. Cogito. The Current Position of the Soul"), "Pan Cogito. Ars longa" ("Mr. Cogito. Ars Longa"), "Pan Cogito. Lekcja kaligrafii" ("Mr. Cogito. A Calligraphy Lesson"), "Zaświaty Pana Cogito" ("The Underworld of Mr. Cogito"). On one hand, they still show Mr. Cogito as willing to change the world around him, but, on the other, they express a final resignation to his fate. Mr. Cogito