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Reality

Reality in everyday usage means 'everything that exists'. The term 'Reality', in its most liberal sense, includes everything that there is, whether or not it is observable, accessible or understandable by science, philosophy or any other system of analysis. Reality in this sense may include both being and nothingness, whereas "existence" is often restricted to being.

In the strict sense of European-German philosophy, in the tradition of Ludwig Wittgenstein, there are levels or gradation to the nature and conception of reality. These levels include, from the most subjective to the most rigorous:

Table of contents
1 Phenomenological reality
2 Truth
3 Fact
4 Axiom
5 What reality is not
6 Reality, world views, and theories of reality
7 Philosophical views of reality
8 See also

Phenomenological reality

On the broadest and most subjective level, the private experiences and personal interpretation of an event, is reality as seen by one and only one individual and hence is called phenomenological. This form of reality might be common to others as well, but at times could also be so unique to oneself as to be never experienced or agreed upon by any one else. Much of the spiritual experience of an individual occurs on this level of reality.

Truth

When two or more individuals agree upon the interpretation and experience of a particular event, a consensus about an event and its experience begins to be formed. This being common to a few individuals or a larger group, then becomes the 'truth' as seen and agreed upon by a certain set of people. Thus one particular group may have a certain set of agreed truths, while another group might have still different set of truths that have reached consensus. This lets different communities and societies have varied and extremely different notions of reality and truth of the external world. The religion and beliefs of people or communities are a fine example of this level of reality. This is well expressed in the famous quote by Henry Thoreau, "It takes two to speak the truth — one to speak and another to hear."

Fact

A fact or factual entity is a phenomenon that is perceived as an elemental principle. It is rarely one that could be subject to personal interpretation. Instead it is most often the observed phenomena of the natural world. The proposition 'the sun rises in the east', is a fact. It is a fact for people belonging to any group or nationality regardless of which language they speak or which part of the hemisphere they come from. The Galilean proposition in support of the Copernican theory, that the sun is the centre of the solar system is one that states the fact of the natural world. However during his life time he (Galileo) was ridiculed for that factual proposition, because far too few people had a consensus about it in order to accept it as a truth. Fewer propositions are factual in content in the world, as compared to the many truths shared by various communities, which are also fewer to the innumerable individual phenomenological realities. Much of scientific exploration, experimentation, interpretation and analysis is done on this level.

Axiom

Axioms are self-evident realities, the existence of which is accepted as given and on which further conceptions are generated.

The facts of a natural world would hold true only in the systemic construction of that world. Hence in a different system, the facts of another world might no longer hold valid. The fact that 'the sun rises in the east', might not be valid in a different solar system where the planet might be tilted in a different angle, or revolving in a different direction around its star, so that the star might rise on the planet's horizon in the west instead of the east. Hence the facts of a systemic entity might not be universal outside the realms of that system. However, exceptionally rare conceptions might be universal in ethos. For example, the mathematical-set theoretic idea that the union of a set of one entity and another set of four entities would create a set that contains five entities,

A = {a}; B = { b, c, d, e}; A ∪ B = { a, b, c, d, e}

would be valid in any systemic process or in any universe. It is in effect a conception more rigorous and pervasive than a fact.

Mathematical formulations and propositions in mathematical logic are based on axioms, and hence these fields are often referred to as pure disciplines. The validity of the set theoretic proposition would hold true in any systemic process or universe. Its validity is self evident in ontological existence and works on the axiomatic level of reality.

Some portion of ultimate reality may lie beyond our scope to examine or even imagine. Many of the concepts of science and philosophy is often defined culturally and socially. This idea was well elaborated by Thomas Kuhn in his book The Structure of Scientific Revolutions (1962). See socially constructed reality for more discussion on this point.

Most of the cultural conflict in the world occurs when certain individuals or groups try to impose their phenomenological realities or truths on other people or communities.

What reality is not

"Reality," the concept, is contrasted with a wide variety of other concepts, largely depending upon the intellectual discipline. It can help to understand what we mean by "reality" to note what we say is not real.

In philosophy, reality is contrasted with nonexistence (e.g., unicorns do not exist; so they are not real) and mere possibility (a mountain made of gold is merely possible, but is not real). Sometimes philosophers speak as though reality is contrasted with existence itself, though ordinary language and many other philosophers would treat these as synonyms. They have in mind the notion that there is a kind of reality--a mental or intensional reality, perhaps--that imaginary objects, such as the aforementioned golden mountain, have. Alexius Meinong is famous, or infamous, for holding that such things have so-called subsistence, and thus a kind of reality, even while they do not actually exist. Most philosophers find the very notion of "subsistence" mysterious and unnecessary, and one of the shibboleths and starting points of 20th century analytic philosophy has been the forceful rejection of the notion of subsistence--of "real" but nonexistent objects.

It is worth saying at this point that many philosophers are not content with saying merely what reality is not--some of them have positive theories of what broad categories of objects are real, in addition. See ontology as well as realism (philosophy); these topics are also briefly treated below.

In ethics, political theory, and the arts, reality is often contrasted with what is ideal.

In ethics, discussions of ethical perfectionism, what might be called "moral idealism" or the notion that we are obligated to be morally perfect human beings, runs up against notions of what is real about human nature and the human condition.

In political theory there is an old and distinguished tradition of inventing utopias and utopianism--those of Plato and Thomas More are the most famous--but these are often accused of ignoring the so-called facts of reality concerning human nature. Political liberalism, by contrast with conservatism, is usually thought of as being of the contrary view--that human nature is inherently changeable, and that there are no "facts of reality" concerning human nature, a view advocated in the twentieth century by the existentialists. And, consequently, utopianism is more often a feature of liberalism rather than conservatism.

In the arts there was a broad movement beginning in the 19th century, realism (which led to naturalism), which sought to portray characters, scenes, and so forth, realistically. This was in contrast and reaction to romanticism, which portrayed their subjects idealistically. Commentary about these artistic movements is sometimes put in terms of the contrast between the real and the ideal: on the one hand, the average, ordinary, and natural, and on the other, the superlative, extraordinary, improbable, and sometimes even supernatural. Obviously, when speaking in this sense, "real" (or "realistic") does not have the same meaning as it does when, for example, a philosopher uses the term to distinguish, simply, what exists from what does not exist.

In the arts, and also in ordinary life, the notion of reality (or realism) is also often contrasted with illusion. A painting that precisely indicates the visually-appearing shape of a depicted object is said to be realistic in that respect; one that distorts features, as Pablo Picasso's paintings are famous for doing, are said not to be unrealistic, and thus some observers will say, but with questionable grammatical correctness, that they are "not real." But there are also tendencies in the visual arts toward so-called realism and more recently photorealism that invite a different sort of contrast with the real. Trompe l'oeil (French, "fool the eye") paintings render their subjects so "realistically" that the casual observer might temporarily be deceived into thinking that he is seeing something, indeed, real--but in fact, it is merely an illusion, and an intentional one at that.

In psychiatry, reality, or rather, of being in touch with reality is integral to the notion of schizophrenia, since it has often been defined in part by reference to being "out of touch" with reality. The schizophrenic is said to have hallucinations and delusions which concern people and events that are not real. However there is controversy over what is considered out of touch with reality, particularly due to the noticeable comparison of the process of forcefully instituting individuals for expressing their beliefs in society to reality enforcement. The practices possible covert use as a political tool can perhaps be illustrated by the 18th Century psychiatric sentences in the U.S of black slaves for 'crazily' attempting to escape. See also anti-psychiatry and one its prominent figures, the ex-psychiatrist Thomas Szasz.

In each of these cases, discussions of reality, or what counts as "real," take on quite different casts; indeed, what we say about reality often depends on what we want to say it is not.

Reality, world views, and theories of reality

A common colloquial usage would have "reality" mean "perceptions, beliefs, and attitudes toward reality," as in "My reality is not your reality." This is often used just as a colloquialism indicating that the parties to a conversation agree, or should agree, not to quibble over deeply different conceptions of what is real. For example, in a religious discussion between friends, one might say (attempting humor), "You might disagree, but in my reality, everyone goes to heaven."

But occasionally--and particularly in the case of those who have been exposed to certain ideas from philosophy, sociology, literary criticism, and other fields--it is often thought that there simply and literally is no reality beyond the perceptions or beliefs we each have about reality. Such attitudes indicate anti-realism, that is, the view that there is no objective reality, whether acknowledged explicitly or not. These topics will be discussed in greater detail below.

If we really do literally mean by "reality" simply "beliefs about reality," then our article about reality would necessarily, to be complete, have to outline every world view (this is how the German word Weltanschauung is usually translated)--every broadly different way of "seeing" reality. In this sense, the topic of reality encompasses many other topics: perception, psychology generally, cognitive psychology and cognitive science, religion, sociology and anthropology, and topics in philosophy. For a broad overview on reality in that sense, the reader is enjoined to peruse Wikipedia or any general reference work. General encyclopedias are, after all, supposed to be descriptions of everything--or perceptions of everything, if the reader prefers.

But there is a way to make the topic of reality less cumbersome for present purposes: restrict the discussion to theories about the general topic of reality itself. Thus, for example, a certain Christian world view would not count as a theory of reality, but the theory that the Christian world view is a "construction" of reality would count as a theory about reality. It is theories about reality, in this sense, that philosophers discuss as part of metaphysics; such theories are also sometimes discussed in literary theory (which is, today, heavily influenced by Continental philosophy and heavily anti-realist) as well as in sociology and cultural anthropology.

Philosophical views of reality

Philosophy addresses two different aspects of the topic of reality: the nature of reality itself, and the relationship between the mind (as well as language and culture) and reality.

On the one hand, ontology is the study of being, and the central topic of the field is couched, variously, in terms of being, existence, "what is," and reality. The task in ontology is to describe the most general categories of reality and how they are interrelated. If--what is rarely done--a philosopher wanted to proffer a positive definition of the concept "reality," it would be done under this heading. As explained above, some philosophers draw a distinction between reality and existence. In fact, many analytic philosophers today tend to avoid the term "real" and "reality" in discussing ontological issues. But for those who would treat "is real" the same way they treat "exists," one of the leading questions of analytic philosophy has been whether existence (or reality) is a property of objects. It has been widely held by analytic philosophers that it is not a property at all, though this view has lost some ground in recent decades.

On the other hand, particularly in discussions of objectivity that have feet in both metaphysics and epistemology, philosophical discussions of "reality" often concern the ways in which reality is, or is not, in some way dependent upon (or, to use fashionable jargon, "constructed" out of) mental and cultural factors such as perceptions, beliefs, and other mental states, as well as cultural artifacts, such as religions and political movements, on up to the vague notion of a common cultural world view or Weltanschauung.

The view that there is a reality independent of any beliefs, perceptions, etc., is called realism. More specifically, philosophers are given to speaking about "realism about" this and that, such as realism about universals or realism about the external world. Generally, where one can identify any class of object the existence or essential characteristics of which is said to depend on perceptions, beliefs, language, or any other human artifact, one can speak of "realism about" that object.

One can also speak of anti-realism about the same objects. "Anti-realism" is the latest in a long series of terms for views opposed to realism. Perhaps the first was idealism , so called because reality was said to be in the mind, or "ideal" in that special sense. Berkeleyan idealism is the view, propounded by the Irish empiricist George Berkeley, that the objects of perception are actually ideas in the mind. On this view, one might be tempted to say that reality is a "mental construct"; this is not quite accurate, however, since on Berkeley's view perceptual ideas are created and coordinated by God. By the twentieth century, views similar to Berkeley's were called phenomenalism. Phenomenalism differs from Berkeleyan idealism primarily in that Berkeley believed that minds, or souls, are not merely ideas nor made up of ideas, whereas varieties of phenomenalism, such as that advocated by Russell, tended to go farther to say that the mind itself is merely a collection of perceptions, memories, etc., and that there is no mind or soul over and above such mental events. Finally, anti-realism became a fashionable term for any view which held that the existence of some object depends upon the mind or cultural artifacts. The view that the so-called external world is really merely a social, or cultural, artifact, called social constructionism, is one variety of anti-realism. Cultural relativism is the view that social issues such as morality are not absolute, but at least partially cultural artifact.

See also

Ontology, Simulated reality, hyperreality, virtual reality


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Content Arts , Inc.
Creating photographic virtual reality experiences for multi-media, Web, cdrom and kiosks. Using quicktime VR, we deliver high impact visual information
http://www.contentarts.com/

Blaxxun Interactive, Inc.
Provides 3D solutions for next-generation commerce, collaboration and community websites.
http://www.blaxxun.com/

Cosmo Software
Originally part of Silicon Graphics now a computer Associates company providing leading-edge content creation tools.
http://www.cai.com/cosmo/

Evans & Sutherland Computer Corp.
Develops and manufactures leading-edge hardware and software for visual systems for simulation, training, and virtual reality applications.
http://www.es.com/

Inition Ltd.
A UK-based company specialising in the development of bespoke real-time 3D graphics applications.
http://www.inition.co.uk

5DT - Fifth Dimension Technologies
A high technology company specializing in Virtual Reality (VR).
http://www.5dt.com/

AuzGnosis Pty Ltd
Virtual Reality Architecture & Design
http://www.auzgnosis.com/

VR Cyber Expo
Virtual 3-D cyber exposition free from the constraint of time and space, on-time mutual communication in avatars in virtual reality, provision of automatic linkage to the web-sites of exhibitors.
http://www.vrs21.com/index.html

Fighter Town
Fligtline is for the general public to the seasoned combat fighter pilot.Flightline will tailor its sims to many interests, from early prop planes of WWII, Korean jet combat,to present day planes.
http://fightertown.com/

Virtual Worlds
3D room planning and visualisation software
http://www.nt.luk.net/virtual/index.htm

Viztek
Developer and integrator of virtual reality, immersive technology. Produces the Virtual Wall, and the I-Cube.
http://www.viz-tek.com/

Interactive 3D
3D virtual salons and 3D web call centers for real-time multi-user online worlds.
http://www.interactive3d.com/

Russian Web Service
On-line interactive 3D multi-user VRML worlds, X3D, MPEG-4. Company and product presentations, virtual reality for exhibition booths and entertainment centers, web design.
http://www.rwwws.ru/

IDA's Terrain Team Virtual Cities
IDA is creating realistic, high resolution, virtual cities to be used in virtual reality immersive training of emergency (police, fire, rescue) first responders.
http://virtualcities.ida.org/

EDS Virtual Reality Centers
Offers VR center design and engineering, vendor coordination and tool selection, content and application development and training.
http://www.eds.com/vr

Fabric.ch
Electronic architecture office creating mixed media projects. Areas of activity include Internet, mobile telecom systems, network design, network technology and architecture.
http://www.fabric.ch/

pagedive 3D environments
3D environments created using the companies own software.
http://www.pagedive.com/

Princess Interactive
Provides various software solutions for online and specialist real time 3D applications.
http://www.princess-interactive.com/

SensAble Technologies
PHANTOM haptics devices and GHOST API allow users to touch and manipulate 3D data.
http://www.sensable.com/

Virtual Presence
For all your virtual reality needs, from hardware to bespoke software, training and turnkey solutions.
http://www.vrweb.com/

EON Reality, Inc.
EON Reality, Inc. develops Virtual Reality Software for the Windows platform.
http://www.EONreality.com/

ParallelGraphics
ParallelGraphics specializes in Internet Virtual Reality Technologies. These include 3D (three dimensional) interactive graphics, multi-user servers and animation.
http://www.parallelgraphics.com/

Geo-metricks
3D models and avatars suitable for real-time applications and virtual reality
http://www.geo-metricks.com/

Engineering & Computer Simulations, Inc.
ECS specializes in 3D graphical content development for real-time virtual reality simulations.
http://ecsorl.com/

Skylark Interactive Media
Pursues new applications and markets while expanding its expertise in Virtual Reality and Web Site development.
http://www.skylarkmedia.com/

Motek
Creates, designs and markets real-time, motion-capture data solutions and products for the entertainment and commercial technology arenas
http://www.motek.org

CyberEdge Information Services
Provides analysis, information, and strategies for organizations involved with virtual reality, visual simulation, and advanced interface technologies.
http://www.cyberedge.com/

Virtual 3d
Specialises in the generation of 3d data for interactive product visualisation and product design.
http://www.v3d.com.au/

Pentagon Digital Services
A full fledged service bureau offering a wide range of services like 3D modelling, VRML and digitization.
http://www.pentagon-india.com/

Exitreality
Exploring new possibilities for Virtual Reality on the Internet. Demonstrates projects in the working, as well as products and new ideas.
http://www.exitreality.com/

Mindcraft Studios
A team that develops 3D conceptions from professional 3D models to complete videoclips or scientific simulations.
http://www.mind-crafts.de/

SINDEL s.r.l.
Manufacturer of maritime/naval simulator system software and hardware for maritime training.
http://www.sindel.it/

Vircinity
Creates Covise, a visalization application for engineering calculations like cfd and fem calculation resulting in stereoscopic virtual reality.
http://www.vircinity.com/

Fakespace systems
Provides "Caves", head mounted displays and interface software for immersive environments.
http://www.fakespacesystems.com/

Netspace Corp
Business Operations Management, Network Monitoring, Engineering Collaboration, and Accident Reconstruction.
http://www.netspacecorp.com/

MGDesign
VR, real time 3d graphics and interactive simulations.
http://www.mgdesign.org/

Facit Visual Simulation
Virtual reality, vr and visual simulation developers of Sense8 virtual reality authoring software.
http://www.facit.co.uk/

RealSense
Specialists in interactive software development. Solutions for design, training, sales, advertising and entertainment.
http://www.real-sense.com/

VRTainment
Developers of artificial worlds. Reseller for the 3D Display Systems of Elumens Corporation. Models, flash and web development.
http://www.vrtainment.com/

Artificial Industry
Providing solutions, systems and services for creating an artificial reality.
http://www.artificialindustry.com

Vstep
Virtual safety training and education platform.
http://www.vstep.nl

Bouresly Medical Services
Virtual Reality medical simulations.
http://www.bouresly.com

lifeinmedia
Focusing on content production and software development within Virtual Reality solutions.
http://www.lifeinmedia.com

VRGroup
Consultants and software developers for training, intuitive interfaces to virtual worlds, and entertainment. Also develops touch-sensitive gloves and 3D camera.
http://www.vrgroup.com/

Annexeon Limited
Provides advice, design, demonstrations, production, and consultation for the public and private sector utilizing the internet, broadband, CD-ROM, and virtual reality techniques.
http://www.annexeon.co.uk/

AMIXIMA
A Canadian virtual reality, 3D computer graphics and technical visualization company.
http://www.amixima.com/

Advanced Science and Automation Corp
Provider of advanced Virtual Reality technology and Intelligent Virtual Agents for large-scale engineering and scientific visualizations.
http://www.ascience.com

PhoeniX Technologies, Inc.
PTI develops and sells Visualeyez, the real-time motion capture system. Visualeyez provides motion capture solutions for both animation and scientific professionals.
http://www.ptiphoenix.com

VirTra Systems
A producer of turnkey immersive virtual reality solutions for a variety of markets. Applications include 360-degree, interactive, photorealistic environments.
http://www.virtrasystems.com

Visbox Inc.
affordable high-end projection-based Virtual Reality
http://www.visbox.com

Metamotion
Offering motion capture systems, hardware and software for facial animation, motion capture, and performance animation.
http://www.metamotion.com

i3Dvision
Offers research and development of customized Virtual Reality and 3D computer graphics software solutions, and Virtual Reality consulting.
http://www.i3dvision.com/

Interactive 3d
Company provides development of real time three dimensional interactive environments solutions. Consultancy, and production for wide range of i3d technologies.
http://www.invue3d.com/

From Geography to Reality
Company specialized in Géo-models production, software development, tools integration, 3D information systems, 3D mixing geographical information systems and virtual reality. Overview of services, and VRML tools for download. [Bilingual Français/English]
http://www.geovrml.com/

EKKLA Research
Develops 3D immersive systems for handhelds.
http://ekkla.free.fr/versengl/pgeng.htm

Ameritech Simulation Inc.
Manufacturer of real-time simulation systems and motion platforms for flight and racing applications, military training, science and education, and the entertainment market.
http://www.ameritechsimulation.com/

IN 3D
Creates 3D visualizations to assist architects and designers in project presentations.
http://www.in-3-d.com

Verefi Technologies, Inc.
Provides innovative software content solutions for training in medical and surgical procedures for medical professionals.
http://verefi.com/indexb.html

Glasson Murray Group Pty Ltd
Provides quality virtual reality, interactive environments, 3D visualisation, graphic design, illustration, multimedia and website services.
http://www.gmg.com.au

PolyDimensions GmbH
3D reconstruction of humans, virtual and augmented reality, haptics and telesurgery
http://polydimension.de

Virtual Reality Centre at Teesside
Works with both private and public sector clients to create VR applications using real-time technologies.
http://vr.tees.ac.uk

ETC Simulation
Designs, manufactures, installs, and maintains simulation systems to train emergency personnel in fire, hazardous material spills, medical and natural disasters.
http://www.etcsimulation.com

Virtex
Virtual Exhibitions, Providers of Digital Soloutions including VR, E-commerce and Web Design.
http://194.164.32.85/virtexpo/dubai/wwwroot/

VRSim
Designs and develops immersive real-time vr simulations for industrial, government and corporate opportunities.
http://www.VRSim.net

Infiscape Inc.
Provides VR-related software consulting, development, and training. Supports a variety of open source VR tools including VR Juggler.
http://www.infiscape.com

3d web technologies
Developers of virtual reality and multimedia applications.
http://www.3dwebtech.co.uk

Inv3rsion, LLC
Specializes in developing real-time 3D visualization and virtual reality applications.
http://www.inv3rsion.com



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