The theory that certain knowledge is impossible. the doctrine that true knowledge or knowledge in a particular area is uncertain
Doubt or disbelief of religious tenets. The doctrine that absolute knowledge is impossible, either in a particular domain or in general.
A methodology based on an assumption of doubt with the aim of acquiring approximate or relative certainty.
doubt or unbelief with regard to a religion, especially Christianity.
Skepticism: from the Greek word (skepsis) meaning “seeking”. This holds that the possibility of knowledge is limited, because of either limitations of the mind or the inaccessibility of its object. Skeptics argue that our senses are unreliable and that even the experts contradict one another. This just show that knowledge mat be sought, but cannot be found. David Hume is a believer in this school of thought.
René Descartes (1596 - 1650) was a French philosopher, mathematician, scientist and writer of the Age of Reason. He has been called the "Father of Modern Philosophy", and much of subsequent Western philosophy can be seen as a response to his writings. He is responsible for one of the best-known quotations in philosophy: "Cogito, ergo sum" ("I think, therefore I am").
Work
Descartes lived during a very skeptical period, at a time before science as we know it existed, and after a long period of relative stagnation in philosophical thought during the Church-dominated and Aristotle-influenced late Middle Ages. He had been impressed, in both his academic work and in his experience of the world at large, by the realization that there appeared to be no certain way of acquiring knowledge, and he saw his main task as the epistemological one of establishing what might be certain knowledge as a stepping stone towards the ultimate pursuit of truth. His more immediate aim in this was to put scientific enquiry in a position where it was no longer subject to attack by Skeptics, and he tried to do this by a kind of