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The word theory has many distinct meanings in different fields of knowledge, depending on their methodologies and the context of discussion.

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Wikipedia about theory

The word theory has many distinct meanings in different fields of knowledge, depending on their methodologies and the context of discussion.

In science a theory is a testable model of the manner of interaction of a set of natural phenomena, capable of predicting future occurrences or observations of the same kind, and capable of being tested through experiment or otherwise verified through empirical observation. For the scientist, "theory" is not in any way an antonym of "fact". For example, it is a fact that an apple dropped on earth has been observed to fall towards the center of the planet, and the theories commonly used to describe and explain this behavior are Newton's theory of universal gravitation (see also gravitation), and the general theory of relativity.

In common usage, the word theory is often used to signify a conjecture, an opinion, a speculation, or a hypothesis. In this usage, a theory is not necessarily based on facts; in other words, it is not required to be consistent with true descriptions of reality. True descriptions of reality are more reflectively understood as statements which would be true independently of what people think about them.

According to the United States National Academy of Sciences,

Some scientific explanations are so well established that no new evidence is likely to alter them. The explanation becomes a scientific theory. In everyday language a theory means a hunch or speculation. Not so in science. In science, the word theory refers to a comprehensive explanation of an important feature of nature that is supported by many facts gathered over time. Theories also allow scientists to make predictions about as yet unobserved phenomena,

Etymology

The word derives from Greek theoria (Jerome), Greek "contemplation, speculation", from "spectator", thea "a view" + horan "to see", literally "looking at a show". There is a second possible etymology that traces the word back to to theion "divine things" instead of thea, reflecting the concept of contemplating the divine organisation (Cosmos) of the nature. It is attested in English since 1592.

Science

In scientific usage, a theory does not mean an unsubstantiated guess or hunch, as it can in everyday speech. A theory is a logically self-consistent model or framework for describing the behavior of a related set of natural or social phenomena. It originates from or is supported by rigorous observations in the natural world, or by experimental evidence (see scientific method). In this sense, a theory is a systematic and formalized expression of all previous observations, and is predictive, logical, and testable. In principle, scientific theories are always tentative, and subject to corrections, inclusion in a yet wider theory, or succession. Commonly, many more specific hypotheses may be logically bound together by just one or two theories. As a rule for use of the term, theories tend to deal with much broader sets of universals than do hypotheses, which ordinarily deal with much more specific sets of phenomena or specific applications of a theory.

Search results for Theory

theory - Definitions from Dictionary.com

Definitions of theory at Dictionary.com. ... Shop Theory Apparel. Be the envy of DC in chic designer apparel from BergdorfGoodman.com ...dictionary.reference.com/browse/theory

K-theory Preprint Archives

Archive for preprints of mathematics research papers in the field of K-theorywww.math.uiuc.edu/K-theory/

Theory - Psychology Wiki

Theory has a number of distinct meanings in different fields of knowledge, depending on the context ... In scientific usage, a theory does not mean an ...psychology.wikia.com/wiki/Theory

Theory - Uncyclopedia, the content-free encyclopedia

Theory is a term originating from two different sources: ... A theory starts life as a brilliant idea, usually when the mind is freed from everyday worries. ...uncyclopedia.org/wiki/Theory

theory - Wiktionary

I have a theory about who broke into the school last night, but I have no proof to back it up. ... That's the theory. ... well-developed theory of electrical ...en.wiktionary.org/wiki/theory

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News about Theory

Theory of Flightless Birds Shot Down

LiveScience.com via Yahoo! News Ostriches, emus, kiwis and other winged non-flyers might seem to be birds of a feather, sharing similar evolutionary origins, but the story could turn out to be much weirder with perhaps numerous flying ancestors. This group of birds, called ratites, has been viewed by biologists as part of a larger group (paleognaths) of mostly extinct birds that are key to understanding the early evolution of ....http://news.yahoo.com/s/livescience/20080908/sc_livescience/...

Physicists ignore black hole theory

ITV.comLeading physicists are set to go ahead with a Big Bang experiment despite warnings it could destroy the universe.http://www.itv.com/News/Articles/Physicists-ignore-black-hol...

M-Theory Solutions Partners With Alterian to Deliver Integrated Marketing Platform to Mid-Market Organizations

PRWeb via Yahoo! News Partnership provides industry leading database marketing, analytics tools and email services specifically designed for on-premise closed-loop direct marketing.http://news.yahoo.com/s/prweb/20080909/bs_prweb/prweb1302804...

Big Bang II to start in Switzerland today

ABC via Yahoo!7 NewsThe world's biggest and most sophisticated science experiment begins in Switzerland later today when scientists attempt to test the Big Bang theory.http://au.news.yahoo.com/a/-/technology/5004132/big-bang-ii-...

Naomi Alderman on Spore: the new game based on evolutionary theory

Guardian UnlimitedNaomi Alderman: Salesof Spore in the US predicted to soar, which is surprising, considering that the game is based on evolutionary theoryhttp://www.guardian.co.uk/technology/2008/sep/08/gameculture...

News about Theory

Scientists in Switzerland to do the monster smash

ForbesIn the $10 billion project - the most extensive physics experiment in history - the Large Hadron Collider will come ever closer to re-enacting the "big bang," the theory that a colossal explosion created the cosmos.http://www.forbes.com/feeds/ap/2008/09/09/ap5405874.html

Ike kills 4 in Cuba, takes aim at Mexico, US Gulf

ForbesOil prices fell below $106 a barrel Tuesday in Asia on the theory that Ike might not be as disruptive to Gulf oil infrastructure as had been feared.http://www.forbes.com/feeds/ap/2008/09/09/ap5405779.html

Seeking Big Bang Explanation Could Be Dangerous Game

FOX NewsApparently, when you allow really smart people access to heavy machinery, slide rules and about 14 billion dollars, they come up with an experiment that could either explain the Big Bang theory or, possibly, create black holes that will swallow the ... http://www.foxnews.com/story/0,2933,419742,00.html

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TimeMcCain is against it, on the theory that it is a tax and therefore bad, and also that it would discourage domestic production. Obama is for it, on the theory that if oil companies can make a nice profit when oil sells for $50 per bbl., they can still ... http://www.time.com/time/nation/article/0,8599,1839724-2,00....

Smooth move! The art of the eco-shave

MSNBCWhen you’re ready for a new razor — though in theory you could keep the handle forever and simply replace the blades — print a pre-paid postage label from the company’s Web site and send your old one back to Recycline to be recycled at no ... http://www.msnbc.msn.com/id/26626178/

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THEORY SKATE & SNOW //

join the theory mailing list! enter your email and click submit!http://www.theoryskateboarding.com/

theory - OneLook Dictionary Search

Words and phrases matching your pattern: (We're restricting the list to terms we think are related to theory, and sorting by relatedness.)http://www.onelook.com/?loc=rz7&w=*&clue=theory

theory - Wiktionary

science: a logical structure that enables one to deduce the possible resultshttp://en.wiktionary.org/wiki/theory

Theory@Everything2.com

theology = T = thinko. theory n. The consensus, idea, plan, story, or set of rules that is currently being used to inform a behavior. This usage is a generalization and ... http://everything2.com/index.pl?node=theory

eMusic Theory - complete online music theory education

online music theory education public area. Learn AMEB music theory. ... E-Music theory is a site dedicated to bringing an interactive learning experience to music theory.http://www.theory.com.au/
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The Big Bang Theory - The Loobenfel...

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Fragments Found in Plane Boost Jet Hole TheoryJuly 28 - Investigators found fragments that appear to bolster the theory that an oxygen tank exploded on a Qantas jet, forcing it to make a dramatic emergency landing with a...Flash - Video

'Chaos Theory' Clip: "Married Eight...

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Wirtz of Fifth Third Expects Rise i...

Wirtz of Fifth Third Expects Rise in Stocks Based on Dow Theorya healthy economy and rising market will follow, Dow's theory goes. (Source: Bloomberg)Windows Media - Video

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SFSAT_Theory.mpg

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Splinter Cell: Chaos Theory User Re...

Splinter Cell: Chaos Theory User Review 7297Review of the Splinter Cell: Chaos Theory video game. Excellent game and the most recent in the very popular series for Xbox and PS2. Videopinions are product reviews and demonstrations by the people ...flash: 0 MB w:400px - h:300px

Splinter Cell Chaos Theory User Rev...

Splinter Cell Chaos Theory User Review 1652Review of the Splinter Cell Chaos Theory Xbox Game Videopinions are product reviews and demonstrations by the people who use them - in full motion video. Go to Expo TV at www.expotv.com to find more ...flash: 0 MB w:400px - h:300px

TeslasTornadoTheory.mov

TeslasTornadoTheory.mov6/12/2002 Tesla's Tornado Theory Of Operation After several people asked about the principle by which Tesla moves, I decided to attempt a simple Theory Of Operation animation . While I could have ex...quicktime: 21.0 MB w:352px - h:264px

import_theory.wmv

import_theory.wmvhere you go here's a video of it.......:) http://mason.gmu.edu/~kmanson/import_theory.wmv it's about half way through itmsmedia: 14.8 MB w:320px - h:240px

Answers for Theory

Greg

What is the best music theory book for preparing for the AP Music Theory Exam?

GregThe Advanced Placement Music Theory (or AP Music Theory) is a course and examination... Some of the material covered in the course involves advanced sight reading, in-depth terminology, musical phr...
Jessica

What theory of child development do you disagree with?

Jessica
I Support Ron Paul

What is the theory that flies come from rotting meat that was disproven?

I Support Ron Paulspontaneous generation was disproven.
marc

What is the difference between a theory that explains and one that merely describes?

marctheory that expalins is a fact acoording to author or scientists who discovered it . But when your ae explaining or describing it ,interpretations with beautiful examples and comparison comes in prac...
why not?

How does Chaos theory make weather prediction more difficult?

why not?The way weather is forecast these days involves solving complicated mathematical equations. The solutions starts with initial conditions that are derived from measurements all over the world. Chaos ...

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