The meaning of the word truth extends from honesty, good faith, and sincerity in general, to agreement with fact or reality in particular. The term has no single definition that the majority of professional philosophers and scholars agree on, as various theories of truth continue to be debated. There are differing claims on questions regarding truth, such as what constitutes truth, how to define and identify truth, the roles that revealed and acquired knowledge play, and whether truth is subjective, relative, objective, or absolute. This article introduces the various perspectives and claims in philosophy.
In religious contexts, truth is often attributed to the divine origin and associated as being eternal, absolute, and immutable. Truth is also understood not only as a matter of conceptual understanding, but as an issue of embodiment, which involves an existential way of being, religious experience, or way of living. An example is in Jesus' words "I am the truth" that indicate an inseparable relationship between truth and human existence.
English truth is from Old English tríewþ, tréowþ, trýwþ, Middle English trewþe, cognate to Old High German triuwida, Old Norse tryggð. Like troth, it is a -th nominalisation of the adjective true (Old English tréowe).
The English word true is derived from the Old English (West Saxon) word (ge)tríewe, tréowe, cognate to Old Saxon (gi)trûui, Old High German (ga)triuwu (Modern German treu "faithful"), Old Norse tryggr, Gothic triggws., all from a Proto-Germanic *trewwj- "having good faith." Old Norse trú, means "faith, word of honour; religious faith, belief" (archaic English troth "loyalty, honesty, good faith," compare Ásatrú).
Thus, truth in its original sense is the quality of "faithfulness, fidelity, loyalty, sincerity, veracity",, and the narrowed sense "in agreement with fact or reality," in Anglo-Saxon expressed by sōþ, is a secondary development coupled to the process of "Enlightenment" in seventeenth century philosophy.
All Germanic languages besides English have introduced a terminological distinction between truth "fidelity" and truth "factuality." To express "factuality," North Germanic opted for nouns derived from sanna "to assert, affirm," while continental West Germanic (German and Dutch) opted for continuations of wâra "faith, trust, pact" (cognate to Slavic věra "(religious) faith," but influenced by Latin verus). Romance languages use terms continuing Latin veritas, while Greek with aletheia and Slavic with pravda have unrelated terms.
Questions about what is a proper basis on which to decide how words, symbols, ideas and beliefs may properly be said to constitute truth, whether for a single person or an entire community or society, are among the many questions addressed by the theories introduced below.
Each of the five substantive theories below deal with truth as something with a nature, a phenomenon, or thing, or type of human experience about which significant things can be said. These theories each present perspectives that are widely agreed by published scholars to apply in some way to a broad set of occurrences that can be observed in human interaction, or which offer significant, stable explanations for issues related to the idea of truth in human experience. There also have more recently arisen "deflationary" or "minimalist" theories of truth based on the idea that the application of a term like true to a statement does not assert anything significant about it, for instance, anything about its nature, but that the label truth is a tool of discourse used to express agreement, to emphasize claims, or to form certain types of generalizations.
Correspondence theories claim that true beliefs and true statements correspond to the actual state of affairs. This type of theory attempts to posit a relationship between thoughts or statements on the one hand and things or objects on the other. It is a traditional model which goes back at least to some of the classical Greek philosophers such as Socrates, Plato, and Aristotle. This class of theories holds that the truth or the falsity of a representation is determined in principle solely by how it relates to objective reality, by whether it accurately describes that reality. For example, there is a true distance to the moon when we humans attempt to go there, and this true distance is necessary to know so that the journey can be successfully made.
Correspondence theory traditionally operates on the assumption that truth is a matter of accurately copying "objective reality" and then representing it in thoughts, words and other symbols. More modern theorists have stated that this ideal cannot be achieved independently of some analysis of additional factors. For example, language plays a role in that all languages have words that are not easily translatable into another. The German word Zeitgeist is one such example: one who speaks or understands the language may "know" what it means, but any translation of the word fails to accurately capture its full meaning (this is a problem with many abstract words, especially those derived in agglutinative languages). Thus, the language itself adds an additional parameter to the construction of an accurate truth predicate. Among the philosophers who grappled with this problem is Alfred Tarski, whose semantic theory is summarized further below in this article.
Proponents of several of the theories below have gone farther to assert that there are yet other issues necessary to the analysis, such as interpersonal power struggles, community interactions, personal biases and other factors involved in deciding what is seen as truth.
For coherence theories in general, truth requires a proper fit of elements within a whole system. Very often, though, coherence is taken to imply something more than simple logical consistency; often there is a demand that the propositions in a coherent system lend mutual inferential support to each other. So, for example, the completeness and comprehensiveness of the underlying set of concepts is a critical factor in judging the validity and usefulness of a coherent system. A pervasive tenet of coherence theories is the idea that truth is primarily a property of whole systems of propositions, and can be ascribed to individual propositions only according to their coherence with the whole. Among the assortment of perspectives commonly regarded as coherence theory, theorists differ on the question of whether coherence entails many possible true systems of thought or only a single absolute system.
Some variants of coherence theory are claimed to characterize the essential and intrinsic properties of formal systems in logic and mathematics. However, formal reasoners are content to contemplate axiomatically independent and sometimes mutually contradictory systems side by side, for example, the various alternative geometries. On the whole, coherence theories have been criticized as lacking justification in their application to other areas of truth, especially with respect to assertions about the natural world, empirical data in general, assertions about practical matters of psychology and society, especially when used without support from the other major theories of truth.
Coherence theories distinguish the thought of rationalist philosophers, particularly of Spinoza, Leibniz, and G.W.F. Hegel, along with the British philosopher F.H. Bradley. They have found a resurgence also among several proponents of logical positivism, notably Otto Neurath and Carl Hempel.
Social constructivism holds that truth is constructed by social processes, is historically and culturally specific, and that it is in part shaped through the power struggles within a community. Constructivism views all of our knowledge as "constructed," because it does not reflect any external "transcendent" realities (as a pure correspondence theory might hold). Rather, perceptions of truth are viewed as contingent on convention, human perception, and social experience. It is believed by constructivists that representations of physical and biological reality, including race, sexuality, and gender are socially constructed. Giambattista Vico was among the first to claim that history and culture were man-made. Vico's epistemological orientation gathers the most diverse rays and unfolds in one axiom—verum ipsum factum—"truth itself is constructed." Hegel, Garns, and Marx were among the other early proponents of the premise that truth is socially constructed.
Consensus theory holds that truth is whatever is agreed upon, or in some versions, might come to be agreed upon, by some specified group. Such a group might include all human beings, or a subset thereof consisting of more than one person.
Among the current advocates of consensus theory as a useful accounting of the concept of "truth" is the philosopher Jürgen Habermas, who maintains that truth is what would be agreed upon in an ideal speech situation. Among the current strong critics of consensus theory is the philosopher Nicholas Rescher.
The three most influential forms of the pragmatic theory of truth were introduced around the turn of the twentieth century by Charles S. Peirce, William James, and John Dewey. Although there are wide differences in viewpoint among these and other proponents of pragmatic theory, they hold in common that truth is verified and confirmed by the results of putting one's concepts into practice.
Peirce defines truth as follows: "Truth is that concordance of an abstract statement with the ideal limit towards which endless investigation would tend to bring scientific belief, which concordance the abstract statement may possess by virtue of the confession of its inaccuracy and one-sidedness, and this confession is an essential ingredient of truth." This statement emphasizes Peirce's view that ideas of approximation, incompleteness, and partiality, what he describes elsewhere as fallibilism and "reference to the future," are essential to a proper conception of truth. Although Peirce uses words like concordance and correspondence to describe one aspect of the pragmatic sign relation, he is also quite explicit in saying that definitions of truth based on mere correspondence are no more than nominal definitions, which he accords a lower status than real definitions.
William James's version of pragmatic theory, while complex, is often summarized by his statement that "the 'true' is only the expedient in our way of thinking, just as the 'right' is only the expedient in our way of behaving." By this, James meant that truth is a quality the value of which is confirmed by its effectiveness when applying concepts to actual practice (thus, "pragmatic").
John Dewey, less broadly than James but more broadly than Peirce, held that inquiry, whether scientific, technical, sociological, philosophical or cultural, is self-corrective over time if openly submitted for testing by a community of inquirers in order to clarify, justify, refine and/or refute proposed truths.
A number of philosophers reject the thesis that the concept or term truth refers to a real property of sentences or propositions. These philosophers are responding, in part, to the common use of truth predicates (e.g., that some particular thing "… is true") which was particularly prevalent in philosophical discourse on truth in the first half of the twentieth century. From this point of view, to assert the proposition “'2 + 2 = 4' is true” is logically equivalent to asserting the proposition “2 + 2 = 4,” and the phrase “is true” is completely dispensable in this and every other context. These positions are broadly described
Whichever term is used, deflationary theories can be said to hold in common that "the predicate 'true' is an expressive convenience, not the name of a property requiring deep analysis." Once we have identified the truth predicate's formal features and utility, deflationists argue, we have said all there is to be said about truth. Among the theoretical concerns of these views is to explain away those special cases where it does appear that the concept of truth has peculiar and interesting properties. (See, e.g., Semantic paradoxes, and below.)
In addition to highlighting such formal aspects of the predicate "is true," some deflationists point out that the concept enables us to express things that might otherwise require infinitely long sentences. For example, one cannot express confidence in Michael's accuracy by asserting the endless sentence:
But it can be expressed succinctly by saying: "Whatever Michael says is true."
Attributed to P. F. Strawson is the performative theory of truth which holds that to say "'Snow is white' is true" is to perform the speech act of signaling one's agreement with the claim that snow is white (much like nodding one's head in agreement). The idea that some statements are more actions than communicative statements is not as odd as it may seem. Consider, for example, that when the bride says "I do" at the appropriate time in a wedding, she is performing the act of taking this man to be her lawful wedded husband. She is not describing herself as taking this man. In a similar way, Strawson holds: "To say a statement is true is not to make a statement about a statement, but rather to perform the act of agreeing with, accepting, or endorsing a statement. When one says 'It's true that it's raining,' one asserts no more than 'It's raining.' The function of [the statement] 'It's true that….' is to agree with, accept, or endorse the statement that 'it's raining.'"
According to the redundancy theory of truth, asserting that a statement is true is completely equivalent to asserting the statement itself. For example, making the assertion that " 'Snow is white' is true" is equivalent to asserting "Snow is white." Redundancy theorists infer from this premise that truth is a redundant concept; that is, it is merely a word that is traditionally used in conversation or writing, generally for emphasis, but not a word that actually equates to anything in reality. This theory is commonly attributed to Frank P. Ramsey, who held that the use of words like fact and truth was nothing but a roundabout way of asserting a proposition, and that treating these words as separate problems in isolation from judgment was merely a "linguistic muddle."
A variant of redundancy theory is the disquotational theory which uses a modified form of Tarski's schema: To say that '"P" is true' is to say that P. Yet another version of deflationism is the prosentential theory of truth, first developed by Dorothy Grover, Joseph Camp, and Nuel Belnap as an elaboration of Ramsey's claims. They argue that sentences like "That's true," when said in response to "It's raining," are prosentences, expressions that merely repeat the content of other expressions. In the same way that it means the same as my dog in the sentence My dog was hungry, so I fed it, That's true is supposed to mean the same as It's raining — if you say the latter and I then say the former. These variations do not necessarily follow Ramsey in asserting that truth is not a property, but rather can be understood to say that, for instance, the assertion "P" may well involve a substantial truth, and the theorists in this case are minimalizing only the redundancy or prosentence involved in the statement such as "that's true."
Deflationary principles do not apply to representations that are not analogous to sentences, and also do not apply to many other things that are commonly judged to be true or otherwise. Consider the analogy between the sentence "Snow is white" and the person Snow White, both of which can be true in a sense. To a minimalist, saying "Snow is white is true" is the same as saying "Snow is white," but to say "Snow White is true" is not the same as saying "Snow White."
There are two main approaches to truth in mathematics. They are the model theory of truth and the proof theory of truth.
Historically, with the nineteenth century development of Boolean algebra mathematical models of logic began to treat "truth," also represented as "T" or "1," as an arbitrary constant. "Falsity" is also an arbitrary constant, which can be represented as "F" or "0." In propositional logic, these symbols can be manipulated according to a set of axioms and rules of inference, often given in the form of truth tables.
In addition, from at least the time of Hilbert's program at the turn of the twentieth century to the proof of Gödel's theorem and the development of the Church-Turing thesis in the early part of that century, true statements in mathematics were generally assumed to be those statements which are provable in a formal axiomatic system.
The works of Kurt Gödel, Alan Turing, and others shook this assumption, with the development of statements that are true but cannot be proven within the system. Two examples of the latter can be found in Hilbert's problems. Work on Hilbert's 10th problem led in the late twentieth century to the construction of specific Diophantine equations for which it is undecidable whether they have a solution, or even if they do, whether they have a finite or infinite number of solutions. More fundamentally, Hilbert's first problem was on the continuum hypothesis. Gödel and Paul Cohen showed that this hypothesis cannot be proved or disproved using the standard axioms of set theory and a finite number of proof steps. In the view of some, then, it is equally reasonable to take either the continuum hypothesis or its negation as a new axiom.
The semantic theory of truth has as its general case for a given language:
where 'P' is a reference to the sentence (the sentence's name), and P is just the sentence itself.
Logician and philosopher Alfred Tarski developed the theory for formal languages (such as formal logic). Here he restricted it in this way: no language could contain its own truth predicate, that is, the expression is true could only apply to sentences in some other language. The latter he called an object language, the language being talked about. (It may, in turn, have a truth predicate that can be applied to sentences in still another language.) The reason for his restriction was that languages that contain their own truth predicate will contain paradoxical sentences like the Liar: This sentence is not true. See The Liar paradox. As a result Tarski held that the semantic theory could not be applied to any natural language, such as English, because they contain their own truth predicates. Donald Davidson used it as the foundation of his truth-conditional semantics and linked it to radical interpretation in a form of coherentism.
Bertrand Russell is credited with noticing the existence of such paradoxes even in the best symbolic formalizations of mathematics in his day, in particular the paradox that came to be named after him, Russell's paradox. Russell and Whitehead attempted to solve these problems in Principia Mathematica by putting statements into a hierarchy of types, wherein a statement cannot refer to itself, but only to statements lower in the hierarchy. This in turn led to new orders of difficulty regarding the precise natures of types and the structures of conceptually possible type systems that have yet to be resolved to this day.
Saul Kripke contends that a natural language can in fact contain its own truth predicate without giving rise to contradiction. He showed how to construct one as follows:
Notice that truth never gets defined for sentences like This sentence is false, since it was not in the original subset and does not predicate truth of any sentence in the original or any subsequent set. In Kripke's terms, these are "ungrounded," since these sentences are never as assigned either truth or falsehood even if the process is carried out infinitely, Kripke's theory implies that some sentences are neither true nor false. This contradicts the Principle of bivalence: every sentence must be either true or false. Since this principle is a key premise in deriving the Liar paradox, the paradox is dissolved.
The ancient Greek origins of the words "true" and "truth" have some consistent definitions throughout great spans of history that were often associated with topics of logic, geometry, mathematics, deduction, induction, and natural philosophy. Socrates, Plato's and Aristotle's ideas about truth are commonly seen as consistent with correspondence theory. In his Metaphysics, Aristotle stated: “To say of what is that it is not, or of what is not that it is, is false, while to say of what is that it is, and of what is not that it is not, is true”. The Stanford Encyclopedia of Philosophy proceeds to say of Aristotle:
Aristotle sounds much more like a genuine correspondence theorist in the Categories (12b11, 14b14), where he talks of “underlying things” that make statements true and implies that these “things” (pragmata) are logically structured situations or facts (viz., his sitting, his not sitting). Most influential is his claim in De Interpretatione (16a3) that thoughts are “likenessess” (homoiosis) of things. Although he nowhere defines truth in terms of a thought's likeness to a thing or fact, it is clear that such a definition would fit well into his overall philosophy of mind.
Immanuel Kant discussed the correspondence theory of truth in the following manner. Kant's criticism of correspondence theory is one of numerous examples of why so many thinkers who examine the question of truth are not satisfied to rest with this first theory that usually comes to mind.
Truth is said to consist in the agreement of knowledge with the object. According to this mere verbal definition, then, my knowledge, in order to be true, must agree with the object. Now, I can only compare the object with my knowledge by this means, namely, by taking knowledge of it. My knowledge, then, is to be verified by itself, which is far from being sufficient for truth. For as the object is external to me, and the knowledge is in me, I can only judge whether my knowledge of the object agrees with my knowledge of the object. Such a circle in explanation was called by the ancients Diallelos. And the logicians were accused of this fallacy by the sceptics, who remarked that this account of truth was as if a man before a judicial tribunal should make a statement, and appeal in support of it to a witness whom no one knows, but who defends his own credibility by saying that the man who had called him as a witness is an honorable man.
According to Kant, the definition of truth as correspondence is a "mere verbal definition," here making use of Aristotle's distinction between a nominal definition, a definition in name only, and a real definition, a definition that shows the true cause or essence of the thing whose term is being defined. From Kant's account of the history, the definition of truth as correspondence was already in dispute from classical times, the "skeptics" criticizing the "logicians" for a form of circular reasoning, though the extent to which the "logicians" actually held such a theory is not evaluated.
When Søren Kierkegaard, as his character Johannes Climacus, wrote that "Truth is Subjectivity", he does not advocate for subjectivism in its extreme form (the theory that something is true simply because one believes it to be so), but rather that the objective approach to matters of personal truth cannot shed any light upon that which is most essential to a person's life. Objective truths are concerned with the facts of a person's being, while subjective truths are concerned with a person's way of being. Kierkegaard agrees that objective truths for the study of subjects like mathematics, science, and history are relevant and necessary, but argues that objective truths do not shed any light on a person's inner relationship to existence. At best, these truths can only provide a severely narrowed perspective that has little to do with one's actual experience of life.
While objective truths are final and static, subjective truths are continuing and dynamic. The truth of one's existence is a living, inward, and subjective experience that is always in the process of becoming. The values, morals, and spiritual approaches a person adopts, while not denying the existence of objective truths of those beliefs, can only become truly known when they have been inwardly appropriated through subjective experience. Thus, Kierkegaard criticizes all systematic philosophies which attempt to know life or the truth of existence via theories and objective knowledge about reality. As Kierkegaard claims, human truth is something that is continually occurring, and a human being cannot find truth separate from the subjective experience of one's own existing, defined by the values and fundamental essence that consist of one's way of life.
Friedrich Nietzsche believed the search for truth or 'the will to truth' was a consequence of the will to power of philosophers. He thought that truth should be used as long as it promoted life and the will to power, and he thought untruth was better than truth if it had this life enhancement as a consequence. As he wrote in Beyond Good and Evil, "The falseness of a judgment is to us not necessarily an objection to a judgment…. The question is to what extent it is life-advancing, life-preserving, species-preserving, perhaps even species-breeding…." (aphorism 4). He proposed the will to power as a truth only because according to him it was the most life affirming and sincere perspective one could have.
Robert Wicks discusses Nietzsche's basic view of truth as follows:
Some scholars regard Nietzsche's 1873 unpublished essay, "On Truth and Lies in a Nonmoral Sense" ("Über Wahrheit und Lüge im außermoralischen Sinn") as a keystone in his thought. In this essay, Nietzsche rejects the idea of universal constants, and claims that what we call "truth" is only "a mobile army of metaphors, metonyms, and anthropomorphisms." His view at this time is that arbitrariness completely prevails within human experience: concepts originate via the very artistic transference of nerve stimuli into images; "truth" is nothing more than the invention of fixed conventions for merely practical purposes, especially those of repose, security and consistence.
Heidegger's concept of truth is complex. He defined truth as "dis-closedness" or "un-concealment" by applying a Greek term, "Aletheia" (ἀ–λήθεια). In Classical Greek, "Lethe" (λήθη; lêthê) literally means "forgetfulness" or "concealment." It is related to the Greek word for "truth": a-lethe-ia (αλήθεια), meaning "un-forgetfulness" or "un-concealment." In Heidegger's ontology, Dasein (human being) is the locus where truth becomes evident. Although human being has an implicit understanding of truth, truth is usually concealed or forgotten because human being exists in "inauthentic" mode. Only when human being restored its "authentic" mode of existence, human being becomes a being where truth is manifested.
From Heidegger's perspective, man's openness to the world is the fundamental condition that allows man to encounter things in the world. Theoretical knowledge and truth, including the correspondence of knowledge and reality, become possible due to man's ontological openness to truth. Heidegger tried to conceptualize the process of disclosure of truth by tying it to man's modes, authentic or inauthentic, of being. Heidegger took "listening to the voice of conscience" and encounter with one's death (non-being) as two primary ways to restore one's authentic mode of existence.
Gandhi dedicated his life to the wider purpose of discovering truth, or Satya. He tried to achieve this by learning from his own mistakes and conducting experiments on himself. He called his autobiography The Story of My Experiments with Truth. Gandhi stated that the most important battle to fight was overcoming his own demons, fears, and insecurities. Gandhi summarized his beliefs first when he said "God is Truth." He would later change this statement to "Truth is God." Thus, Truth in Gandhi's philosophy is God.
Alfred North Whitehead a British mathematician who became an American philosopher, said: "There are no whole truths; all truths are half-truths. It is trying to treat them as whole truths that plays the devil."
The logical progression or connection of this line of thought is to conclude that truth can lie, since half-truths are deceptive and may lead to a false conclusion.
According to Kitaro Nishida, "[k]nowledge of things in the world begins with the differentiation of unitary consciousness into knower and known and ends with self and things becoming one again. Such unification takes form not only in knowing but in the valuing (of truth) that directs knowing, the willing that directs action, and the feeling or emotive reach that directs sensing."
Erich Fromm finds that trying to discuss truth as "absolute truth" is sterile and that emphasis ought to be placed on "optimal truth." He considers truth as stemming from the survival imperative of grasping one's environment physically and intellectually, whereby young children instinctively seek truth so as to orient themselves in "a strange and powerful world." The accuracy of their perceived approximation of the truth will therefore have direct consequences on their ability to deal with their environment. Fromm can be understood to define truth as a functional approximation of reality. His vision of optimal truth is described partly in "Man from Himself: An Inquiry into the Psychology of Ethics" (1947), from which excerpts are included below.
Truth, for Michel Foucault, is problematic when any attempt is made to see truth as an "objective" quality. He prefers not to use the term truth itself but "Regimes of Truth." In his historical investigations he found truth to be something that was itself a part of, or embedded within, a given power structure. Thus Foucault's view shares much in common with the concepts of Nietzsche. Truth for Foucault is also something that shifts through various episteme throughout history.
Jean Baudrillard considers truth to be largely simulated, that is pretending to have something, as opposed to dissimulation, pretending to not have something. He takes his cue from iconoclasts who he claims knew that images of God demonstrated the fact that God did not exist. Baudrillard writes in "Precession of the Simulacra":
Some example simulacra that Baudrillard cites are: that prisons simulate the "truth" that society is free; scandals (e.g., Watergate) simulate that corruption is corrected; Disney simulates that the U.S. itself is an adult place. One must remember that though such examples seem extreme, such extremity is an important part of Baudrillard's philosophy. For a less extreme example consider how movies, almost without exception, end with the bad guy being punished, thus drilling into the viewers that successful businessmen and politicians are good or, if not, will be caught.
In religious contexts, truth has often such attributes as eternity, immutability, and transcendence, and attributed to God or some divine existence. Furthermore, truth is often not simply a conceptual knowledge but existential matter. In other words, man comes to understand or become aware of truth only through religious practices or process of embodiment. Jesus' words "I am the truth," for example, implies that he is the embodiment of truth. In Zen Buddhism, truth become available not through conceptual understanding but through the experience of "enlightenment." It is the body-mind experience which involves existential turn of one's life.
The Four Noble Truths are the most fundamental Buddhist teachings and appear countless times throughout the most ancient Buddhist texts, the Pali Canon. They arose from Buddha's enlightenment, and are regarded in Buddhism as deep spiritual insight, not as philosophical theory, with Buddha noting in the Samyutta Nikaya: "These Four Noble Truths, monks, are actual, unerring, not otherwise. Therefore they are called noble truths."
The Four Noble Truths (Catvāry Āryasatyāni) are as follows:
There is no unilateral agreement amongst the different denominations of Judaism concerning truth. In Orthodox Judaism, truth is the revealed word of God, as found in the Old Testament, and to a lesser extent, in the words of the sages of the Talmud. For Hasidic Jews (an Orthodox sect), truth is also found in the pronouncements of their rebbe, or spiritual leader, who is believed to possess divine inspiration..Kotzk, a Polish Hasidic sect, was known for their obsession with truth.
In Conservative Judaism, truth is not defined as literally as it is amongst the Orthodox. While Conservative Judaism acknowledges the truth of the Old Testament, generally, it does not accord that status to every single statement or word contained therein, as do the Orthodox. Moreover, unlike Orthodox Judaism, Conservative Judaism believes that the nature of truth can vary from generation to generation, depending on circumstances. For instance, with respect to halakhah, or Jewish law (which loosely-speaking can be described as the will of God as expressed in day-to-day activity), Conservative Judaism believes that it can be modified or adapted depending on the needs of the people. In Orthodox Judaism, by contrast, the halakhah is fixed (by the sages of the Talmud and later authorities); the present-day task, therefore, is to interpret the halakhah, but not to change it.
Reform Judaism takes a much more liberal approach to truth. It does not hold that truth is only found in the Old Testament; rather, there are kernels of truth to be found in practically every religious tradition. Moreover, its attitude towards the Old Testament is, at best, a document parts of which may have been inspired, but with no particular monopoly on truth, or in any way legally binding.
Assertions of truth based upon history, revelation and testimony set forward in the Bible are central to Christian beliefs. Some denominations have asserted additional authorities as sources of doctrinal truth — for instance, in Roman Catholicism the Pope is asserted to be infallible on matters of church doctrine. The central person in Christianity, Jesus, claimed to be "Truth" when he said, "I am the Way and the Truth and the Life; no one comes to the Father but through me." In Christian Science, Truth is God.
Some Christian traditions hold a doctrine called Biblical inerrancy, which asserts that the Bible is without error, that is, it can be said to be true as to all issues contained within, whether Old Testament or New. Various interpretations have been applied, depending on the tradition. According to some interpretations of the doctrine, all of the Bible is without error, i.e., is to be taken as true, no matter what the issue. Other interpretations hold that the Bible is always true on important matters of faith, while yet other interpretations hold that the Bible is true but must be specifically interpreted in the context of the language, culture and time that relevant passages were written.
The Roman Catholic Church holds that it has a continuous teaching authority, magisterium, which preserves the definitive, i.e.. the truthful, understanding of scripture. The notion of the Pope as "infallible" in matters of faith and morals is derived from this idea.
In thirteenth century Europe, the Roman Catholic Church denounced what it described as theories of "double truth," i.e., theories to the effect that although a truth may be established by reason, its contrary ought to be believed as true as a matter of faith. The condemnation was aimed specifically at a "Latin Averroist" (see Averroës), Siger of Brabant, but it was more broadly an attempt to halt the spread of Aristotle's ideas, which the reconquest of Spain and, accordingly, access to the libraries of the Moors had re-introduced into the Latin literate world. At the time, much of the doctrine of the Roman Catholic Church was based upon neoplatonic ideas, and Aristoteleanism struck many as heresy. Siger and others seem to have conceded this, and to have used the sharp reason/faith distinction that came to be known as "double truth" as a way of legitimizing discussion of Aristotle despite that concession.
Although, historically, Jain authors have adopted different views on truth, the most prevalent is the system of anekantavada or "not-one-sidedness." This idea of truth is rooted in the notion that there is one truth, but that only enlightened beings can perceive it in its entirety; unenlightened beings only perceive one side of the truth (ekanta). Anekantavada works around the limitations of a one-sided view of truth by proposing multiple vantage points (nayas) from which truth can be viewed (cf. nayavada). Recognizing that there are multiple possible truths about any particular thing, even mutually exclusive truths, Jain philosophers developed a system for synthesizing these various claims, known as syadvada. Within the system of syadvada, each truth is qualified to its particular view-point; that is "in a certain way," one claim or another or both may be true.
A myth is a narrative that a particular culture believes to be both true and significant, typical involving the supernatural or aiming to explain the nature of the universe and humanity. In the opinion of J. R. R. Tolkien,
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