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 human personality. The third, "Pan Cogito a perła" ("Mr. Cogito And A Pearl") – an unrhymed narrative of a pearl stuck in Mr. Cogito's shoe, treated as a metaphor of having to face life's adversities. The next poems – "Pan Cogito myśli o powrocie do rodzinnego miasta" ("Mr. Cogito Considers Returning to His Native Town"), "Pan Cogito rozmyśla o cierpieniu" ("Mr. Cogito Meditates on Suffering") and "Przepaść Pana Cogito" ("The Abyss of Mr. Cogito") depict Mr. Cogito confronting various existential dilemmas. Existential problems are a presence throughout the collection, appearing in the following texts: "Pan Cogito a myśl czysta" ("Mr.