Truth, Facts and Contradiction - Ep. 4.1: Theories of truth (Coherentism)

Truth, Facts and Contradiction - Ep. 4.1: Theories of truth (Coherentism)

🎙 Graham Priest 👥 5K 📅 June 26, 2020 ⏱ 13 min 👁 431 📄 expert opinion 🧭 2026-08-17
Available in: English (current) Français

Keywords

truthcoherentismdialetheismconsistencyGraham Priest

Summary

In this episode, Graham Priest discusses the coherentist theory of truth and its compatibility with dialetheism. He begins by clarifying that dialetheism is simply the view that some contradictions are true, and that this does not commit one to a specific theory of truth. He then addresses the coherentist view, which holds that truth is a matter of coherence with a system of beliefs. Priest argues that coherence is often conflated with consistency, but that consistency is not a necessary condition for coherence. He illustrates this with the example of flat-earthers, who maintain consistency by adding ad hoc hypotheses, yet their view is not coherent in a broader sense. Priest emphasizes that coherence involves many criteria beyond consistency, such as explanatory power, simplicity, and unification. Therefore, coherentism is not inherently hostile to dialetheism, as long as coherence is not defined solely in terms of consistency. The discussion is part of a series on truth, facts, and contradiction.

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Critical Evaluation

Value of the Information & Strength of the Argument

The video provides valuable insights into the relationship between coherentism and dialetheism. Priest’s argument is well-structured and persuasive, using concrete examples to illustrate his points. He effectively challenges the assumption that coherence requires consistency, showing that other criteria are equally important. The discussion is nuanced and avoids oversimplification, making it a valuable resource for those interested in philosophical logic.

Scientific Rigor, Source Quality, Title Accuracy

The video is part of a lecture series by UFBA, featuring Graham Priest, a renowned philosopher. The content is rigorous and aligns with established philosophical discourse. The title accurately reflects the content, and the discussion is well-organized. No external sources are cited, but the arguments are based on standard philosophical concepts and examples.

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Title / Content Match

The title accurately reflects the content, which focuses on theories of truth, specifically coherentism, and its relation to contradiction.

Quality & Reliability

8/10

The video features a leading expert in logic and philosophy (Graham Priest) discussing coherentist theories of truth in relation to dialetheism. The argumentation is rigorous, drawing on philosophical distinctions and examples. The discussion is part of a structured lecture series, and the content is consistent with established philosophical literature.

Key Moments

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Contribution & Novelties

The video offers a clear and accessible explanation of how coherentism can be reconciled with dialetheism, challenging the common assumption that coherence requires consistency. It contributes to the ongoing discussion on theories of truth by highlighting the multifaceted nature of coherence.

Pour aller plus loin :

  • Coherentism (Stanford Encyclopedia of Philosophy) — Provides a comprehensive overview of coherentist theories of truth and justification.
  • Dialetheism (Stanford Encyclopedia of Philosophy) — Explores the view that some contradictions are true, including its motivations and challenges.
  • Paraconsistent Logic (Internet Encyclopedia of Philosophy) — Discusses logical systems that tolerate contradictions, relevant to the discussion of consistency and coherence.

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Radar Profile

The radar profile shows high scores in quality of information and reliability, with moderate scores in quantity and technical level. This indicates a focused, expert discussion that is accessible to a general audience but still rigorous.

Reliability 8/10