Multiple choice general knowledge sports Cogino Ergo Sum is the philosophical statement used by ....? Étienne Gilson Bernard Williams Rene Descartes Georg Lichtenberg Reveal answer Fill a bubble to check yourself C Correct answer Explanation Cogito ergo sum ('I think, therefore I am') is René Descartes' foundational philosophical statement from his Discourse on Method (1637). It establishes the existence of the self through the act of thinking.