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 which unequivocally identifies the character with the poet for the very first time in the oeuvre. It mentions his return to his homeland, and the other poems in the collection treat about various aspects of Mr. Cogito's being – imagination ("Mr. Cogito and the Imagination"), longevity ("Mr. Cogito and Longevity"), virtue ("Mr. Cogito on Virtue"), eschatological concepts ("Mr. Cogito's Eschatological Premonitions"), bloodshed ("Mr. Cogito Thinks about Blood"), a contact with Maria Rasputin ("Mr. Cogito and Maria Rasputin – an Attempt at Contact"), the need for precision ("Mr. Cogito on the Need for Precision), the notes from a house of the