Cartesian doubt him. While methodic doubt has a nature, one need not hold that knowledge is impossible in order to apply the method of doubt. Indeed, Descartes' attempt to apply the method of doubt to the existence of himself spawned the proof of his famous saying, ""Cogito, ergo sum"" (I think, therefore I am). That is, Descartes tried to doubt his own existence, but found that even his doubting showed that he existed, since he could not doubt if he did not exist. Cartesian doubt Cartesian doubt is a form of methodological skepticism associated with the writings and methodology of René Descartes
Mr. Cogito Cogito and Pure Thought"), "Pan Cogito czyta gazetę" ("Mr. Cogito Reads A Newspaper"), "Pan Cogito a ruch myśli" (" Mr. Cogito and the Motion of Thought"), "Domy przedmieścia" ("Houses On The Outskirts Of The City"), "Alienacje Pana Cogito" ("Mr. Cogito's Alienations"), "Pan Cogito obserwuje zmarłego przyjaciela" ("Mr. Cogito Watches a Deceased Friend"), "Późnojesienny wiersz Pana Cogito przeznaczony dla kobiecych pism" ("Mr. Cogito's Late Autumn Poem For Women's Magazines"), "Pan Cogito rozważa różnice między głosem ludzkim a głosem przyrody" ("Mr. Cogito Considers the Difference Between the Human Voice And The Voice of Nature"), "Pan Cogito biada nad małością snów" (Mr. Cogito