- the science that investigates the principles governing correct or reliable inference.
- a particular method of reasoning or argumentation: We were unable to follow his logic.
- the system or principles of reasoning applicable to any branch of knowledge or study.
- reason or sound judgment, as in utterances or actions: There wasn't much logic in her move.
- convincing forcefulness; inexorable truth or persuasiveness: the irresistible logic of the facts.
- Computers. logic circuit.
Origin of logic
SynonymsSee more synonyms for on Thesaurus.com
- a combining form used in the formation of adjectives corresponding to nouns ending in -logy: analogic.
Origin of -logic
Related Wordssanity, philosophy, rationale, sense, argumentation, inference, relationship, coherence, deduction, ratiocination, connection, syllogism, thesis, dialectic, induction, linkage
Examples from the Web for logic
Their logic: the sea-creature would come alive and drink up any remaining alcohol.History's Craziest Hangover Cures
December 30, 2014
The birds will seek us out and they will use no logic we know.
Kim Novak's heavy legs were concealed and all logic left on the cutting room floor.
This came across in the Showtime Omit the Logic documentary—in which you were a commentator—and it comes across here.How Richard Pryor Beat Bill Cosby and Transformed America
David Yaffe, Scott Saul
December 10, 2014
There was a logic to it – many of the wines were from the Pacific Northwest, principally from Oregon and Washington state.Beer Countries vs. Wine Countries
December 7, 2014
In dealing with children what is needed is not logic but sense.A Treatise on Parents and Children
George Bernard Shaw
Yet in spite of all his logic he knew that something was going to happen.Dust
Mr. and Mrs. Haldeman-Julius
Show me the fault of it: I challenge all the logic of all the Percivals.Tales And Novels, Volume 3 (of 10)
The judges' decisions based on it were sound in logic and in law.The Devil's Dictionary
What logic, what process of argument secures you against this supposition?
- the branch of philosophy concerned with analysing the patterns of reasoning by which a conclusion is properly drawn from a set of premises, without reference to meaning or contextSee also formal logic, deduction (def. 4), induction (def. 4)
- any particular formal system in which are defined axioms and rules of inferenceCompare formal system, formal language
- the system and principles of reasoning used in a specific field of study
- a particular method of argument or reasoning
- force or effectiveness in argument or dispute
- reasoned thought or argument, as distinguished from irrationality
- the relationship and interdependence of a series of events, facts, etc
- chop logic to use excessively subtle or involved logic or argument
- electronics computing
- the principles underlying the units in a computer system that perform arithmetical and logical operationsSee also logic circuit
- (as modifier)a logic element
Word Origin and History for logic
mid-14c., "branch of philosophy that treats of forms of thinking," from Old French logique (13c.), from Latin (ars) logica, from Greek logike (techne) "reasoning (art)," from fem. of logikos "pertaining to speaking or reasoning," from logos "reason, idea, word" (see logos). Meaning "logical argumentation" is from c.1600.
- The study of the principles of reasoning, especially of the structure of propositions as distinguished from their content and of method and validity in deductive reasoning.
The branch of philosophy dealing with the principles of reasoning. Classical logic, as taught in ancient Greece and Rome, systematized rules for deduction. The modern scientific and philosophical logic of deduction has become closely allied to mathematics, especially in showing how the foundations of mathematics lie in logic.