Decartes

Just a little something I came across when my friend was working on a paper. 1. If I know something about the world then I know it is not possible that I am making an error. 2. I do not know it is not possible I am making an error. 3. I do not know something about the world. I doubt everything but my own existence. -Decartes I think it's very relevent to the cousre since it plays with the idea of perception and living in one's own reality. And it's cyclical to boot!