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that fully explains and links together all known physical phenomena. Initially, the term was used with an ironic connotation to refer to various overgeneralized theories. For example, a great-grandfather of
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over the last century, but none have been confirmed experimentally. The primary problem in producing a TOE is that the accepted theories of
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Rescher, Nicholas (2006a). "Holistic
Explanation and the Idea of a Grand Unified Theory". Collected Papers IX: Studies in Metaphilosophy.
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have discussed the viability of the concept and analyzed its properties and implications. Among the questions to be addressed by a
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that govern them. However, the term "universe" may be used in slightly different contextual senses, denoting such concepts as the
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stories of the 1960s—was known to work on the "General Theory of
Everything". Over time, the term stuck in popularizations of
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usually refers only to the totality of things relevant to the subject matter. When there is no expressed limitation,
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Rescher, Nicholas (2006b). "The Price of an
Ultimate Theory". Collected Papers IX: Studies in Metaphilosophy.
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of everything are: "Why is reality understandable?", "Why are the laws of nature as they are?", and "
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are hard to combine. Theories exploring quantum mechanics and string theory are easier to combine.
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to describe a theory that would unify or explain through a single model the theories of all
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The universe is most commonly defined as everything that physically exists: the entirety of
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may exist according to theoretical cosmology predictions. It may refer to an
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arguments from the 1990s, many physicists believe that 11-dimensional
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368:. Adopting the term from physics, where the search for a
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There have been many theories of everything proposed by
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220:may refer to everything that constitutes
34:is everything that exists theoretically (
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112:is a part of everything, including all
494:"Prolegomena to Any Future Philosophy"
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446:. Merriam-Webster Online Dictionary
232:. However, world may only refer to
38:image of distant galaxies pictured)
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348:Theory of everything (philosophy)
492:Walker, Mark Alan (March 2002).
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382:Why is there anything at all?
284:—a character from a cycle of
21:Everything (disambiguation)
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336:perturbative string theory
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128:In ordinary conversation,
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298:fundamental interactions
275:(TOE) is a hypothetical
36:Hubble Ultra-Deep Field
305:theoretical physicists
257:In theoretical physics
203:many-worlds hypothesis
195:bubble universe theory
116:and in some cases all
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324:holographic principle
322:Based on theoretical
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378:philosophical theory
370:theory of everything
354:theory of everything
332:matrix string theory
273:theory of everything
263:Theory of everything
19:For other uses, see
415:Something (concept)
269:theoretical physics
238:envisioned from an
207:quantum measurement
317:special relativity
313:general relativity
230:World (philosophy)
199:physical constants
104:in general. Every
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352:In philosophy, a
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448:. Retrieved
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300:in nature.
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513:Perception
507:Categories
450:2008-06-17
427:References
420:Trivialism
282:Ijon Tichy
191:multiverse
163:, and the
134:everything
130:everything
91:multiverse
69:complement
59:antithesis
43:Everything
247:worldview
216:context,
201:. In the
193:. In the
169:constants
140:, or the
98:worldview
67:, or its
523:Quantity
518:Ontology
399:Infinity
388:See also
328:M-theory
226:universe
224:and the
161:momentum
138:universe
87:universe
82:anything
32:universe
410:Nothing
366:reality
222:reality
64:nothing
362:nature
315:, and
277:theory
228:: see
186:nature
177:, the
174:cosmos
157:energy
153:matter
110:entity
106:object
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77:limits
55:exists
244:human
235:Earth
218:World
183:, or
180:world
142:world
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271:, a
167:and
159:and
149:time
108:and
30:The
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364:or
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356:or
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61:of
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