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From Ancient Greek ἀποδεικτικός (apodeiktikós). Compare Latin apodicticus


  • IPA(key): /ˌapəˈdaɪk.tɪk/


apodeictic (not comparable)

  1. Affording proof; demonstrative.
  2. Incontrovertible; demonstrably true or certain.
  3. (logic) Of the characteristic feature of a proposition that is necessary (or impossible): perfectly certain (or inconceivable) or incontrovertibly true (or false); self-evident.
    • 1855, John Miller Dow Meiklejohn (translator), 1787, Immanuel Kant, Critique of Pure Reason, 2nd Edition,
      Thus, moreover, the principles of geometry- for example, that "in a triangle, two sides together are greater than the third," are never deduced from general conceptions of line and triangle, but from intuition, and this a priori, with apodeictic certainty.
    • 1896, Thomas Bailey Saunders (translator), 1831, Arthur Schopenhauer, The Art of Controversy
      Aristotle does, indeed, distinguish between (1) Logic, or Analytic, as the theory or method of arriving at true or apodeictic conclusions; and (2) Dialectic as the method of arriving at conclusions that are accepted or pass current[ly] as true,...
    • 2009, Jonathan Dancy, Ernest Sosa, Matthias Steup, A Companion to Epistemology,
      Descartes sought certainty in the existence of God grounded in apodeictic demonstrations.


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