(ˈkɒɡɪˌtəʊ ˈɜːɡəʊ ˈsʊm) (Philosophy) I think, therefore I am; the basis of Descartes' philosophy
co•gi•to, er•go sum
(ˈkoʊ gɪˌtoʊ ˈɛr goʊ ˈsʊm; Eng. ˈkɒdʒ ɪˌtoʊ ˈɜr goʊ ˈsʌm, ˈɛr goʊ) Latin. I think, therefore I am (stated by Descartes as the first principle in resolving universal doubt).