Final answer:
Rene Descartes, a French scientist and philosopher, developed the cartesian coordinate system and proposed mind-body dualism.
Step-by-step explanation:
Rene Descartes was a French scientist and philosopher known for his contributions to philosophy and mathematics. He devised the cartesian coordinate system, which uses a set of axes to label each point on a flat plane with a pair of numbers. Descartes also proposed the concept of mind-body dualism, asserting that the soul is separate from the body. His famous statement "I think, therefore I am" reflects his belief in the existence of the mind without the need for a physical body.