logic

noun
log·​ic | \ ˈlä-jik How to pronounce logic (audio) \

Definition of logic

1a(1) : a science that deals with the principles and criteria of validity of inference and demonstration : the science of the formal principles of reasoning a professor of logic
(2) : a branch or variety of logic modal logic Boolean logic
(3) : a branch of semiotics especially : syntactics
(4) : the formal principles of a branch of knowledge the logic of grammar
b(1) : a particular mode of reasoning viewed as valid or faulty She spent a long time explaining the situation, but he failed to see her logic.
(2) : relevance, propriety could not understand the logic of such an action
c : interrelation or sequence of facts or events when seen as inevitable or predictable By the logic of events, anarchy leads to dictatorship.
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 the logic of war

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Other Words from logic

logician \ lō-​ˈji-​shən How to pronounce logician (audio) \ noun

How are logistics and logic related?

Logistics follows the same pattern of other plural nouns—such as ballistics, linguistics, statistics, or physics—that represent fields of study and take either a singular or plural verb.

Logic, used strictly in the singular, is a science that deals with the formal principles of reason. If a visitor walks in the house with wet hair, it is logical for one to assume that it is raining outside. Logistics, which involves such concerns as the delivery of personnel or supplies in an efficient manner, can often employ logic, such as by reasoning out the path least likely to interrupt the flow of a delivery:

As with many other areas of the economy, the digital revolution is having a profound effect on delivery logistics. The combination of mobile computing, analytics, and cloud services, all of which are fueled by the Internet of Things (IoT), is changing how delivery and fulfillment companies are conducting their operations.
—Andrew Meola, Business Insider, 14 Oct. 2016

Both logic and logistics ultimately derive from the Greek logos, meaning "reason." But while logic derives directly from Greek, logistics took a longer route, first passing into French as logistique, meaning "art of calculating," and then into English from there.

Examples of logic in a Sentence

If you just use a little logic, you'll see I'm right. There's no logic in your reasoning. There's some logic to what he says. There's a certain logic in what he says. The revolution proceeded according to its own logic. the logic of the situation
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Recent Examples on the Web The only problem in the Supra's powertrain is its transmission logic. K.c. Colwell, Car and Driver, "Tested: 2020 Ford Mustang 2.3L vs. 2021 Toyota Supra 2.0," 13 Oct. 2020 In a way, Amazon was, as usual, following its unique logic. Cecilia D'anastasio, Wired, "Amazon Wants to ‘Win at Games.’ So Why Hasn’t It?," 7 Oct. 2020 As Bismarck’s compatriot, Carl von Clausewitz, said, war has its own logic. Margaret Macmillan, WSJ, "The World That War Has Made," 2 Oct. 2020 Is their logic anchored on their loyalty to the old rules of conduct? Albert Ko, Fortune, "Amid vaccine trials, the FDA is on trial itself," 24 Sep. 2020 Over the course of each fifteen- or twenty-minute segment, a system is imposed with its own governing logic and structure. Kyle Chayka, The New Yorker, "“Get Organized with The Home Edit” Is Infomercial Reality Television," 23 Sep. 2020 While discerning who the team has actual interest in is, of course, paramount, half the fun (give or take) of draft season is simply trying to apply our own logic to their situation and give best guesses as to who fits the bill. Eric Walden, The Salt Lake Tribune, "With the NBA Draft two months away, here’s who the early mock drafters have coming to the Utah Jazz," 19 Sep. 2020 Democrats say that Republicans should be bound by their own logic in this election year. Laura Litvan, Bloomberg.com, "How U.S. Supreme Court Justices Are Confirmed," 19 Sep. 2020 Complicating matters is the fact that the initial investigating detective suffered a breakdown, using astrology and its peculiar logic as his primary investigative tool. Bill Sheehan, Washington Post, "J.K. Rowling’s ‘Troubled Blood’ is her most ambitious Robert Galbraith novel yet — and likely the most divisive," 17 Sep. 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'logic.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of logic

12th century, in the meaning defined at sense 1a(1)

History and Etymology for logic

Middle English logik, from Anglo-French, from Latin logica, from Greek logikē, from feminine of logikos of reason, from logos reason — more at legend

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Time Traveler for logic

Time Traveler

The first known use of logic was in the 12th century

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Statistics for logic

Last Updated

20 Oct 2020

Cite this Entry

“Logic.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/logic. Accessed 30 Oct. 2020.

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More Definitions for logic

logic

noun
How to pronounce logic (audio)

English Language Learners Definition of logic

: a proper or reasonable way of thinking about or understanding something
: a particular way of thinking about something
: the science that studies the formal processes used in thinking and reasoning

logic

noun
log·​ic | \ ˈlä-jik How to pronounce logic (audio) \

Kids Definition of logic

1 : a proper or reasonable way of thinking about something : sound reasoning There's no logic in what you said.
2 : a science that deals with the rules and processes used in sound thinking and reasoning

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Comments on logic

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