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."
1 200 ans avant que Descartes ait dit son célèbre "Je pense donc je suis", ce gars-là, saint Augustin, s'est assis et a écrit "Fallor ergo sum" - "Je me trompe donc je suis."