Philosophy Officer on Instagram: "Crash course on Descartes Cartesian doubt is probably one of the first things you’ll learn about in any intro philosophy course. It’s an extreme and radical skepticism. It doubts everything, every sensation, every belief, every thought. In Descartes “meditations” he comes to understand that merely the act of doubting implies there is a doubter. To be deceived implies that there is someone being deceived. So even IF everything is a deception, or an illusion, by v