Cogito, ergo sum (See CSMK III 159, 161.) Another predecessor was Avicenna's "Floating Man" thought experiment on human self-awareness and self-consciousness. The 8th century Hindu philosopher Adi Shankara wrote in a similar fashion, No one thinks, 'I am not', arguing that one's existence cannot be doubted, as there must be someone there to doubt. The central idea of "cogito, ergo sum" is also the topic of Mandukya Upanishad. Spanish philosopher Gómez Pereira in his 1554 work "De Inmortalitate Animae", published in 1749, wrote ""nosco me aliquid noscere, & quidquid noscit, est, ergo ego sum"" ("I know that I know something, anyone who knows
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