In Discourse on the Method, René Descartes lays the foundation for modern philosophy and scientific reasoning. Written as a personal account of his intellectual journey, Descartes presents a method for attaining clear and certain knowledge through doubt, reason, and systematic inquiry. He explores how to distinguish truth from error, the proper use of reason, and the steps by which one can achieve understanding in both science and philosophy. Famous for the declaration “I think, therefore I am”, ...