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logic

noun

log·​ic ˈlä-jik How to pronounce logic (audio)
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
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
logician
lō-ˈji-shən How to pronounce logic (audio)
noun

Did you know?

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 a wet umbrella, 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.

Synonyms

Example Sentences

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 See More
Recent Examples on the Web By that logic, Ohio State gave up six explosive plays against Notre Dame, most notably a 54-yard pass to open the game. Stephen Means, cleveland, 10 Sep. 2022 The pick: See the AFC title odds decision and double that logic. Jason Hoffman, The Enquirer, 9 Sep. 2022 That logic also applies to other entities that didn't settle, including insurers who hold Boy Scouts policies and other charter organizations. Cara Kelly, USA TODAY, 8 Sep. 2022 But for some who signed the letter against Wen, that logic doesn’t hold up. Globe Staff, BostonGlobe.com, 1 Sep. 2022 But that logic doesn’t apply to the moment when Laszlo unsuccessfully attempts to turn into a bat. Tyler Coates, The Hollywood Reporter, 17 Aug. 2022 Therefore, a full moon in Aquarius is a time when we might be confronted with our desire to figure everything out with logic. Emily Newhouse, Allure, 11 Aug. 2022 While some worried that the disappointments of the bill would make voters less enthusiastic this fall, others turned that logic on its head, arguing that its shortcomings show the need to elect more politicians who support climate action. Sarah Kaplan, Anchorage Daily News, 10 Aug. 2022 Court records show that Meta complied with the logic. Ashley Belanger, Ars Technica, 9 Aug. 2022 See More

Word History

Etymology

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

First Known Use

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

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

Phrases Containing logic

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