What did René Descartes believe in?

Answer 1

One of the most important discoveries for modern mathematics made by Rene Descartes was the Cartesian coordinate system. Two other major discoveries are the law of reflection and parts of the law of conservation of energy.

Answer 2

He believed he could know for sure that he existed. Because at one point, he doubted everything in the world, but what he could not doubt was that he was doubting. So he could not doubt that somebody or something was doubting. Cogito ergo sum, I think so I am.

He believed he had found the evidence that god exists. Because god is a perfect creature and immortal. He, as mortal and not perfect human could never create a perfect creature in his mind. There was also no perception for god. So god must be existing.

Second evidence for the existing of god was that god was perfect, and how could he be perfect if he didn't exist?

And if god existed, he could be sure his senses were trustworthy, because a good god would never give anyone false senses

Answer 3

The wording of this question implies that you already know of some things that Descartes did, and want to know what else he did. However, we have no way of knowing what you know and so cannot answer the question.

Answer 4

What he did was discovered Analytic Geometry.

Answer 5

Nature could be explained through abstract reasoning and experimentation.

Answer 6

Rene Descartes' most famous quote is "I think therefore I am".

Answer 7

Rene Descartes lived in the early 17th century. Discoveries that came after and were influenced by him include the calculus that was developed by Isaac newton and Gottfried Leibniz.

Answer 8

Coordinate system (geometry).