Whilst it's probably a little extreme to claim Descartes' proposition "Je pense donc je suis'' * as a failed philosophy,there have been some serious critiques. Notably from Soren Kierkegaard and Bernard Williams.
Descartes' proposition is widely accepted and considered crucial in the development of western philosophy.That makes his ideas of value and worthy of study,it does not make them true necessarily. To argue something is true because it has not been proved to be false or false because it has not been proved to be true is a common logical fallacy,argument from ignorance.This was expressed pithily by Carl Sagan as "absence of evidence is not evidence of absence".
*Descartes wrote in French,not Latin.
Descartes' proposition is widely accepted and considered crucial in the development of western philosophy.That makes his ideas of value and worthy of study,it does not make them true necessarily. To argue something is true because it has not been proved to be false or false because it has not been proved to be true is a common logical fallacy,argument from ignorance.This was expressed pithily by Carl Sagan as "absence of evidence is not evidence of absence".
*Descartes wrote in French,not Latin.
