I think, therefore I am (Latin: Cogito ergo sum; French: Je pense, donc je suis).
Rene Descartes invented the famous Cartesian coordinate system.He worked in the field of analytic geometry.
Descartes believed that a person should use reason and doubt to prove something existed. He is famous for the quote "Cogito, ergo sum," which means "I think, therefore I am." This quote signifies his belief that the act of doubting one's existence actually proves that one exists as a thinking being.
The philosopher who stated "I think therefore I am" is René Descartes. This famous philosophical quote is from his work "Discourse on the Method" published in 1637.
Rene desscartes was the father of mathematics.
Rene Descartes "You are therefore I am" was coined by Satish Kumar : child Jain monk, peace pilgrim, ecological activist, and educator. It is Similar to René Descartes' famous maxim "I think, therefore, I am." but not the same.
== == Oddly enough, the place now called Descartes. Initially called La Haye en Touraine, the town was renamed La Haye-Descartes in 1802 in his honour, and then renamed again to Descartes in 1967.
Descartes arrives at his distinction between mind and matter through his method of doubt, where he questions the certainty of all his beliefs. He concludes that while the existence of the external world may be uncertain, the existence of his own mind as a thinking thing is indubitable. This leads to his famous formulation of the mind-body dualism.
Known for the quote... "I think therefore I am."
Rene Descartes is credited with being the first modern rationalist, following in the footsteps of Plato and Aristotle. Despite this, Descartes was never very vocal when it came to politics, but this didn't stop people from proclaiming him as the inspiration for the French Revolution and the Declaration of the Rights of Man.
To quote René Descartes: "I think, therefore I am." To exist, think.
Cogito ergo sum "Je pense donc je suis" is a famous quote of René Descartes. It means "I think, therefore I am"
Short answer: Descartes' doubt was like WWI - the doubt to end all doubt. Only by doubting everything could Descartes hope to find anything that was certain (even if the only certainty is that nothing else is certain!).