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1. unquestionably true by virtue of demonstration
2. (Logic) logic archaic
a. necessarily true
b. asserting that a property holds necessarily
[C17: from Latin apodīcticus, from Greek apodeiktikos clearly demonstrating, from apodeiknunai to demonstrate]
ˌapoˈdeictically, ˌapoˈdictically adv
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|Adj.||1.||apodeictic - of a proposition; necessarily true or logically certain|
logic - the branch of philosophy that analyzes inference
true - consistent with fact or reality; not false; "the story is true"; "it is undesirable to believe a proposition when there is no ground whatever for supposing it true"- B. Russell; "the true meaning of the statement"