# Definitions for **fuzzy logic**

### This page provides all possible meanings and translations of the word **fuzzy logic**

### Random House Webster's College Dictionary

fuzz′y log′ic(n.)

the theory of a mathematical set (fuzz′y set′) having the property that each of its members is described in terms of a number, with a value in the range from 0 to 1, that indicates the degree on a spectrum of values to which the member belongs to the set.

**Category:**Math

#### Origin of **fuzzy logic**:

1960–65

### Princeton's WordNet

fuzzy logic(noun)

a form of mathematical logic in which truth can assume a continuum of values between 0 and 1

### Wiktionary

fuzzy logic(Noun)

A form of reasoning, derived from fuzzy set theory, whereby a truth value need not be exactly zero (false) or one (true), but rather can be zero, one, or any value in between.

### Freebase

Fuzzy logic

Fuzzy logic is a form of many-valued logic or probabilistic logic; it deals with reasoning that is approximate rather than fixed and exact. Compared to traditional binary sets fuzzy logic variables may have a truth value that ranges in degree between 0 and 1. Fuzzy logic has been extended to handle the concept of partial truth, where the truth value may range between completely true and completely false. Furthermore, when linguistic variables are used, these degrees may be managed by specific functions. Irrationality can be described in terms of what is known as the fuzzjective. The term "fuzzy logic" was introduced with the 1965 proposal of fuzzy set theory by Lotfi A. Zadeh. Fuzzy logic has been applied to many fields, from control theory to artificial intelligence. Fuzzy logics however had been studied since the 1920s as infinite-valued logics notably by Łukasiewicz and Tarski.

### U.S. National Library of Medicine

Fuzzy Logic

Approximate, quantitative reasoning that is concerned with the linguistic ambiguity which exists in natural or synthetic language. At its core are variables such as good, bad, and young as well as modifiers such as more, less, and very. These ordinary terms represent fuzzy sets in a particular problem. Fuzzy logic plays a key role in many medical expert systems.

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"fuzzy logic." *Definitions.net.* STANDS4 LLC, 2014. Web. 25 Oct. 2014. <http://www.definitions.net/definition/fuzzy logic>.