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:
- P is true
- S believes that P is true, and
- 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.
Famous quotes containing the words justified, true and/or belief:
“But you were washed, you were sanctified, you were justified in the name of the Lord Jesus Christ and in the Spirit of our God.”
—Bible: New Testament, 1 Corinthians 6:11.
“The true poem is not that which the public read. There is always a poem not printed on paper,... in the poet’s life. It is what he has become through his work. Not how is the idea expressed in stone, or on canvas or paper, is the question, but how far it has obtained form and expression in the life of the artist. His true work will not stand in any prince’s gallery.”
—Henry David Thoreau (1817–1862)
“The belief that established science and scholarship—which have so relentlessly excluded women from their making—are “objective” and “value-free” and that feminist studies are “unscholarly,” “biased,” and “ideological” dies hard. Yet the fact is that all science, and all scholarship, and all art are ideological; there is no neutrality in culture!”
—Adrienne Rich (b. 1929)