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 años antes que Descartes dijera su cita famosa "Pienso, luego existo" San Agustín se sentó y escribió "Fallor ergo sum"; "Me equivoco, luego existo".