New York Dada known and controversial across the New York, as well as American in general, art scene. His personality was equally intoxicating as his art; according to Richter, "Duchamp's attitude is that life is a melancholy joke, an indecipherable non-sense, not worth the trouble of investigating. To his superior intelligence the total absurdity of life, the contingent nature of a world denuded of all values, are logical consequences of Descartes' Cogito ergo sum." Most famous amongst the works created by Duchamp in the New York period were his ready-mades, particularly the piece entitled "Fountain". During his time in New York he maintained
Mr. Cogito Laments On The Pettiness of Dreams"), "Pan Cogito a poeta w pewnym wieku" ("Mr. Cogito And A Poet Of A Certain Age"), "Pan Cogito a pop" ("Mr Cogito And Pop Music"), "Pan Cogito o magii" ("Mr. Cogito On Magic"), "Pan Cogito spotyka w Luwrze posążek Wielkiej Matki" ("Mr. Cogito Encounters A Figurine Of The Great Mother In The Louvre"), "Pan Cogito opowiada o kuszeniu Spinozy" ("Mr. Cogito Narrates The Temptation Of Spinoza"), "Pan Cogito otrzymuje czasem dziwne listy" ("Mr Cogito Occasionally Receives Strange Letters"), "Rozmyślania Pana Cogito o odkupieniu" ("Mr Cogito's Meditations On Redemption"), "Pan Cogito szuka rady" ("Mr. Cogito