" Apodictic", also spelled " apodeictic" (, "capable of demonstration"), is an adjective expression from syllogism that refers to that are demonstrably, necessarily or true. Dictionary definitions of apodictic, from dictionary.com, including material from the Random House Unabridged Dictionary, Random House (2006), The American Heritage Dictionary of the English Language, Fourth Edition, 2006 by Houghton Mifflin Company, and WordNet 3.0, Princeton University 2006. Apodicticity or is the corresponding abstract noun, referring to logical truth.
Apodictic propositions contrast with assertoric propositions, which merely assert that something is (or is not) true, and with problematic propositions, which assert only the possibility of something's being true. Apodictic judgments are clearly provable or logically certain. For instance, "Three plus one equals four" is apodictic, because it is true by definition. "Chicago is larger than Omaha" is assertoric. "A corporation could be wealthier than a country" is problematic. In Aristotelianism logic, "apodictic" is opposed to "dialectic", as scientific proof is opposed to philosophical reasoning. Immanuel Kant contrasted "apodictic" with "problematic" and "assertoric" in the Critique of Pure Reason (A70/B95 - A76/B101).
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