In the famous 1637 treatise, Discourse on the Method, French philosopher and mathematician, René Descartes made the famous proclamation, Je pense, donc je suis, translated as ‘I think, therefore I am’. His main argument was that the very act of thinking - and doubting – was the absolute proof of consciousness and existence. In other words, Descartes was situating the source of our agency as humans in our capacity to reason.