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This theory is based on the notion of a structured, formal language and predicates like 'is true' applied to sentences. Alfred Tarski is one of its main proponents.

According to this theory, truth is constructed by social processes, always historically and culturally specific, and that there is no objective truth. Notable proponents include Giambattista Vico and Ernst von Glasersfeld.

This theory extends traditional true-false evaluation with additional truth values. Jan Łukasiewicz and Lotfi A. Zadeh worked in areas related to this theory.

This theory maintains that there may be different ways in which a proposition can be true, depending on conceptual or contextual considerations. Prominent pluralists include William James and Crispin Wright.

This theory suggests that truth is found in the practical consequences of belief and that true ideas are those that we can assimilate, validate, corroborate and verify. Charles Sanders Peirce and William James are known for this theory.

This theory holds that asserting that a proposition is true is the same thing as asserting the proposition itself. Frank P. Ramsey is known for holding this view.

This is a mathematical theory where truth is viewed in the context of a model of a formal language. Key figures include Alfred Tarski and Kurt Gödel.

This theory is a variant of the coherence theory where truth is seen as the absence of contradictions in a system or set of propositions. It is often associated with formal logic and mathematics.

The theory posits that truth is a property of a belief only if it is justified. Proponents include Michael Dummett and Crispin Wright.

This theory states that truth is a matter of how concepts or propositions correspond to the reality. Proposed by philosophers like Aristotle and Bertrand Russell.

This theory claims that propositions are true if they cohere with a set of beliefs or propositions. Key proponents include Baruch Spinoza and Brand Blanshard.

This theory argues that the assertion that a statement is true is just an expression of agreement with the statement itself and not a substantial attribute of it. Proponents include Paul Horwich and Alfred Tarski to some extent.

In this theory, truth is a matter of authentic existence and living in a way that is true to oneself. Martin Heidegger and Søren Kierkegaard are associated with this existential perspective on truth.

This theory asserts that truth is whatever is agreed upon by some specified group. Associated with Jurgen Habermas and the discourse ethics.