1,200 years before Descartes said his famous thing about "I think therefore I am," this guy, St. Augustine, sat down and wrote "Fallor ergo sum" -- "I err therefore I am."
1200 vuotta sitten Descartes sanoi: "Ajattelen, siis olen", tämä mies, Aurelius Augustinus kirjoitti: "Fallor ergo sum" -- "Erehdyn, siis olen."