**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

### Other articles related to "logic":

**Logic**

... In

**logic**, two mutually exclusive propositions are propositions that logically cannot be true at the same time ...

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

**logic**... The distinction between "presentation" (front end) and "business

**logic**" (infrastructure) is usually an important one, because the presentation source code language may differ from other code assets ...

**Logic**

... One well-known system of paraconsistent

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

**Logic**of Paradox"), first proposed by the Argentinian logician F ... of LP are precisely those of classical propositional

**logic**... LP and classical

**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**...

**Logic**- Notable Figures

... Notable figures in the history and/or modern development of paraconsistent

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

**logic**, a kind of paraconsistent

**logic**... Worked with Anderson on relevance

**logic**...

**Logic**- Applications

... Paraconsistent

**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 ... Some believe that paraconsistent

**logic**has significant ramifications with respect to the significance of Russell's paradox and Gödel's incompleteness theorems ...

### Famous quotes containing the word logic:

“...some sort of false *logic* has crept into our schools, for the people whom I have seen doing housework or cooking know nothing of botany or chemistry, and the people who know botany and chemistry do not cook or sweep. The conclusion seems to be, if one knows chemistry she must not cook or do housework.”

—Ellen Henrietta Swallow Richards (1842–1911)

“The usefulness of madmen is famous: they demonstrate society’s *logic* flagrantly carried out down to its last scrimshaw scrap.”

—Cynthia Ozick (b. 1928)

“The American Constitution, one of the few modern political documents drawn up by men who were forced by the sternest circumstances to think out what they really had to face instead of chopping *logic* in a university classroom.”

—George Bernard Shaw (1856–1950)