In Descartes’ Meditation II. ¶ 13 Descartes concludes, "'I am, I exist' is necessarily true whenever it is put forward by me or conceived in my mind." Descartes reaches this conclusion by first asserting that his method of doubt so far has left him doubting his senses. He intends on further using his method of doubt to, like Archimedes, discover at least one thing that is certain, even if this one thing is that nothing is certain. Descartes reasons that his sensory concept of an object cannot be trusted, so there must be another source God, malignant demon, or Descartes himself of his perception of an object. For, if he rejects his possession of both senses and body, and simultaneously claims existence is defined by body and senses,
