Cartesian Thinking originates from the French philosopher René Descartes and is a philosophical and scientific framework emphasizing reason, systematic doubt, and mind-body dualism. Its essence lies in acquiring reliable knowledge through clear and distinct ideas and deductive reasoning, rather than relying on sensory experience. Descartes argued that the mind (a thinking substance) and the body (an extended substance) are two fundamentally separate and distinct entities. This mode of thinking advocates systematically doubting all unproven assumptions until indubitable truths—such as "I think, therefore I am"—are discovered. It provides an analytical method for breaking down complex problems into simpler components and examining them individually.