Coherence theories of truth characterize truth as a property of whole systems of propositions that can be ascribed to individual propositions only derivatively according to their coherence with the whole. While modern coherence theorists hold that there are many possible systems to which the determination of truth may be based upon coherence, others, particularly those with strong religious beliefs, hold that the truth only applies to a single absolute system. In general, truth requires a proper fit of elements within the whole system. Very often, though, coherence is taken to imply something more than simple formal coherence. For example, the coherence of the underlying set of concepts is considered to be a critical factor in judging validity. In other words, the set of base concepts in a

universe of discourse In the formal sciences, the domain of discourse, also called the universe of discourse, universal set, or simply universe, is the set of entities over which certain variables of interest in some formal treatment may range. Overview The doma ...

must form an intelligible paradigm before many theorists consider that the coherence theory of truth is applicable.

History

modern philosophy Modern philosophy is philosophy developed in the modern era and associated with modernity. It is not a specific doctrine or school (and thus should not be confused with ''Modernism''), although there are certain assumptions common to much of i ...

, the coherence theory of truth was defended by Baruch Spinoza,

Immanuel Kant Immanuel Kant (, , ; 22 April 1724 – 12 February 1804) was a German philosopher and one of the central Enlightenment thinkers. Born in Königsberg, Kant's comprehensive and systematic works in epistemology, metaphysics, ethics, and ...

, Johann Gottlieb Fichte,

Karl Wilhelm Friedrich Schlegel Karl Wilhelm Friedrich (after 1814: von) Schlegel (; ; 10 March 1772 – 12 January 1829) was a German poet, literary critic, philosopher, philologist, and Indologist. With his older brother, August Wilhelm Schlegel, he was one of the main figure ...

Georg Wilhelm Friedrich Hegel Georg Wilhelm Friedrich Hegel (; ; 27 August 1770 – 14 November 1831) was a German philosopher. He is one of the most important figures in German idealism and one of the founding figures of modern Western philosophy. His influence extends ...

and Harold Henry Joachim (who is credited with the definitive formulation of the theory). However, Spinoza and Kant have also been interpreted as defenders of the correspondence theory of truth. In contemporary philosophy, several epistemologists have significantly contributed to and defended the theory, primarily

Brand Blanshard Percy Brand Blanshard (; August 27, 1892 – November 19, 1987) was an American philosopher known primarily for his defense of reason and rationalism. A powerful polemicist, by all accounts he comported himself with courtesy and grace in philosop ...

(who gave the earliest characterization of the theory in contemporary times) and

Nicholas Rescher Nicholas Rescher (; ; born 15 July 1928) is a German-American philosopher, polymath, and author, who has been a professor of philosophy at the University of Pittsburgh since 1961. He is chairman of the Center for Philosophy of Science and was fo ...

Varieties

According to one view, the coherence theory of truth regards

truth Truth is the property of being in accord with fact or reality.Merriam-Webster's Online Dictionarytruth 2005 In everyday language, truth is typically ascribed to things that aim to represent reality or otherwise correspond to it, such as belie ...

as coherence within some specified set of sentences,

proposition In logic and linguistics, a proposition is the meaning of a declarative sentence. In philosophy, " meaning" is understood to be a non-linguistic entity which is shared by all sentences with the same meaning. Equivalently, a proposition is the no ...

s or beliefs.The Coherence Theory of Truth (Stanford Encyclopedia of Philosophy)
/ref> It is the "theory of knowledge which maintains that truth is a property primarily applicable to any extensive body of consistent propositions, and derivatively applicable to any one proposition in such a system by virtue of its part in the system". Ideas like this are a part of the philosophical perspective known as '' confirmation holism''. Coherence theories of truth claim that coherence and consistency are important features of a theoretical system, and that these properties are ''sufficient'' to its truth. To state it in the reverse, that "truth" exists only within a system, and doesn't exist outside of a system. According to another version by H. H. Joachim (the philosopher credited with the definitive formulation of the theory, in his book ''The Nature of Truth'', published in 1906), truth is a ''systematic coherence'' that involves more than

logical consistency In classical deductive logic, a consistent theory is one that does not lead to a logical contradiction. The lack of contradiction can be defined in either semantic or syntactic terms. The semantic definition states that a theory is consistent ...

. In this view, a proposition is true to the extent that it is a necessary constituent of a systematically coherent whole. Others of this school of thought, for example,

, hold that this whole must be so interdependent that every element in it necessitates and even entails every other element. Exponents of this view infer that the most complete truth is a property solely of a unique coherent system, called the ''absolute'', and that humanly knowable propositions and systems have a degree of truth that is proportionate to how fully they approximate this ideal.Baylis, Charles A. (1962), "Truth", in Dagobert D. Runes (ed.), ''Dictionary of Philosophy'', Littlefield, Adams, and Company, Totowa, NJ.

Criticism

Perhaps the best-known objection to a coherence theory of truth is

Bertrand Russell Bertrand Arthur William Russell, 3rd Earl Russell, (18 May 1872 – 2 February 1970) was a British mathematician, philosopher, logician, and public intellectual. He had a considerable influence on mathematics, logic, set theory, linguistics, ...

's. He maintained that since both a belief and its negation will, individually, cohere with at least one set of beliefs, this means that contradictory beliefs can be shown to be true according to coherence theory, and therefore that the theory cannot work. However, what most coherence theorists are concerned with is not all possible beliefs, but the set of beliefs that people actually hold. The main problem for a coherence theory of truth, then, is how to specify just this particular set, given that the truth of which beliefs are actually held can only be determined by means of coherence.

History

Varieties

Criticism

See also

References

Further reading