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Main Entry: log·ic

Pronunciation: 'lä-jik
Function: noun
Etymology: Middle English logik, from Middle French logique, from Latin logica, from Greek logikE, from feminine of logikos of reason, from logos reason -- more at LEGEND
Date: 12th century

1 a (1) : a science that deals with the principles and criteria of validity of inference and demonstration : the science of the formal principles of reasoning
(2) : a branch or variety of logic
(3) : a branch of semiotic; especially : SYNTACTICS
(4) : the formal principles of a branch of knowledge b
(1) : a particular mode of reasoning viewed as valid or faulty
(2) : RELEVANCE, PROPRIETY c : interrelation or sequence of facts or events when seen as inevitable or predictable d : the arrangement of circuit elements (as in a computer) needed for computation; also : the circuits themselves

2 : something that forces a decision apart from or in opposition to reason