French philosopher Rene Decartes tried to show that?
http://en.wikipedia.org/wiki/Des_cartes
Many things ... so read carefully and take good notes.
What are your choices?
What do you think the answer is?
a. Gruyere made the best cheese sandwiches.
b. all philosophical arguments were inductive arguments.
c. radical skepticism was the best approach to philosophy.
d. at least one thing could be shown to be absolutely true.
French philosopher René Descartes attempted to establish a foundation for knowledge that could not be doubted. He aimed to prove the existence of a secure and absolute basis for understanding reality. To accomplish this, Descartes formulated a method of doubt, which involved questioning the certainty of all beliefs and ideas. He aimed to strip away any assumptions and preconceived notions that could lead to uncertainty or error.
Descartes famously proposed the phrase "Cogito, ergo sum" (I think, therefore I am) as a starting point for establishing indubitable knowledge. He argued that even if he were to doubt the existence of his body, his senses, or the external world, he could not doubt the fact that he was doubting. This "cogito" became the foundation upon which Descartes built his philosophical system.
Furthermore, Descartes sought to demonstrate knowledge of the external world by proving the existence of a benevolent and non-deceptive God. He believed that if God were capable of deceiving him, then everything he thought he knew would be thrown into doubt. By establishing the existence of a perfect and trustworthy God, Descartes aimed to overcome skepticism and lay the groundwork for a secure and certain knowledge of reality.
Overall, Descartes' objective was to provide a methodological framework for achieving knowledge that was beyond doubt or uncertainty, relying on rationality, deduction, and skepticism.