Justified True Belief

Justified true belief is a definition of knowledge that is most frequently credited to Plato and his dialogues. The concept of justified true belief states that in order to know that a given proposition is true, one must not only believe the relevant true proposition, but one must also have justification for doing so. In more formal terms, a subject S knows that a proposition P is true if and only if:

  1. P is true
  2. S believes that P is true, and
  3. S is justified in believing that P is true

This theory of knowledge suffered a significant setback with the discovery of Gettier problems, situations in which the above conditions were seemingly met but that many philosophers disagree that anything is known. Robert Nozick suggested a clarification of "justification" which he believed eliminates the problem: the justification has to be such that were the justification false, the knowledge would be false.

Other articles related to "belief, true, justified, justified true belief":

Gettier Problem - Other Responses To Gettier
... into the discussion by Gettier of terms such as belief and knows moves the discussion into the field of epistemology ... Here, the sound (true) arguments ascribed to Smith, then need also to be valid (believed) and convincing (justified) if they are to issue in real-world discussion about justified true belief ... have taken are constrained by the structure of Gettier's argument if knowledge is solely justified true belief, then there cannot be any cases of justified true belief ...
Philosophical Problems - Epistemology - Gettier Problem
... philosophers, who accepted justifiability, truth, and belief as the necessary criteria for information to earn the special designation of being "knowledge." In 1963 ...
True - Places
... True, West Virginia, U.S ... True, Wisconsin, U.S ... True, County Tyrone, a townland in County Tyrone, Northern Ireland ...

Famous quotes containing the words belief, justified and/or true:

    Religion was nearly dead because there was no longer real belief in future life; but something was struggling to take its place—service—social service—the ants’ creed, the bees’ creed.
    John Galsworthy (1867–1933)

    You who want to be justified by the law have cut yourselves off from Christ; you have fallen away from grace.
    Bible: New Testament, Galatians 5:4.

    If we cannot find a way to interpret the utterances and other behaviour of a creature as revealing a set of beliefs largely consistent and true by our own standards, we have no reason to count that creature as rational, as having beliefs, or as saying anything.
    Donald Davidson (b. 1917)