René Descartes was a French philosopher, mathematician, and scientist who is considered one of the founders of modern western philosophy. His philosophy is often referred to as Cartesianism, and it centers around the idea that the mind and the body are separate entities, and that the mind is capable of knowing certain truths independently of sensory experience.

The allegory of the cave is a famous philosophical parable told by the ancient Greek philosopher Plato. It appears in his work "The Republic," and is meant to illustrate the idea that our understanding of the world is limited by our sensory experiences.