**Logic** (from the Greek λογική, *logikē*) refers to both the study of modes of reasoning (which are valid and which are fallacious) and the use of valid reasoning. In the latter sense, logic is used in most intellectual activities, including philosophy and science, but in the first sense, is primarily studied in the disciplines of philosophy, mathematics, semantics, and computer science. It examines general forms that arguments may take. In mathematics, it is the study of valid inferences within some formal language. Logic is also studied in argumentation theory.

Logic was studied in several ancient civilizations, including India, China, and Greece. In the west, logic was established as a formal discipline by Aristotle, who gave it a fundamental place in philosophy. The study of logic was part of the classical trivium, which also included grammar and rhetoric.

Logic is often divided into three parts, inductive reasoning, abductive reasoning, and deductive reasoning.

Read more about Logic: The Study of Logic, History

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**logic**include Alan Ross Anderson (USA, 1925–1973) ... One of the founders of relevance

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**Logic**

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... flexibility in the code and resources dedicated to the presentation

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**Logic**

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**logic**is the simple system known as LP ("

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**logic**differ only in the inferences they deem valid.) Relaxing the requirement that every formula be either true or false yields the weaker paraconsistent

**logic**commonly known as FDE ("First-Degree ...

**Logic**- Applications

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**logic**has been applied as a means of managing inconsistency in numerous domains, including Semantics ... Paraconsistent

**logic**has been proposed as means of providing a simple and intuitive formal account of truth that does not fall prey to paradoxes such as the ... Some believe that paraconsistent

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### Famous quotes containing the word logic:

“The much vaunted male *logic* isn’t logical, because they display prejudices—against half the human race—that are considered prejudices according to any dictionary definition.”

—Eva Figes (b. 1932)

“What avail all your scholarly accomplishments and learning, compared with wisdom and manhood? To omit his other behavior, see what a work this comparatively unread and unlettered man wrote within six weeks. Where is our professor of belles-lettres, or of *logic* and rhetoric, who can write so well?”

—Henry David Thoreau (1817–1862)