... a proposition is formulated in our minds, then this proves that we necessarily exist as minds with the ability to think. Existence is thus dependent on the thinking mind. The Cogito is important in that it suggests three things. Firstly it establishes Descartes' existence. Secondly, it provides a general criteria for truth and certainty: that when he conceives something very clearly and very distinctly, it is true. Thirdly, Descartes discovers his nature, of being a thinking thing, and these aid him in his quest to rebuild his knowledge. Through the Cogito Descartes proves that he does exist; this point is generally accepted. However the nature of the Cogito is strange in that he only proves that he exists so long as he thinks; it is not a timeless declaration. Indeed Descartes asks himself, "I am, I exist - that is certain: but for how long? For as long as I ...

See this essay or coursework document in full right now