Theories about them have to rely on a preponderance of other evidence, which alone are not solid enough to warrant much conclusiveness.

Theories about the solar plasma stream and its interaction with Earth were published as early as 1931.

Theories are analytical tools for understanding, explaining, and making predictions about a given subject matter.

* Ingen grenser ( Theories about Odin, Norwegian only ), 1999

* Jakten på Odin ( Theories about Odin, Norwegian only ), 2001

Theories which claim that morality is derived from reasoning about implied imperatives ( universal prescriptivism ), the edicts of a god ( divine command theory ), or the hypothetical decrees of a perfectly rational being ( ideal observer theory ), are considered anti-realist in the robust sense used here, but are considered realist in the sense synonymous with moral universalism.

Theories that the painting is about duality ( city and country, male and female ) have been dismissed since radiography has shown that in the earlier stages of the painting the soldier to the left was a seated female nude.

Theories have been proposed about the Greek origin of the symbol and its implications.

Theories about what caused berserker behaviour include ingestion of materials with psychoactive properties, psychological processes, and medical conditions.

Theories about the site have focused on the idea of inversion, as represented by the upside-down central tree stump and the single post turned 180 degrees from the others within the circle itself.

Theories held by mainstream Egyptologists about the date of the construction of the Great Sphinx of Giza have been challenged and various alternative theories have been proposed – about the builder or the dating – to explain its construction.

Theories about his identity made at the time included that he was a Marshal of France ; or the English Richard Cromwell, son of Oliver Cromwell ; or François, Duke of Beaufort.

Theories about unobservable phenomena are regarded as having no scientific meaning.

Theories sparked about Olson's having been assassinated by the CIA.

Theories about the origin of the name Reynard are:

* Testing Heyerdahl's Theories about Kon-Tiki 60 Years Later: Tangaroa Pacific Voyage ( Summer 2006 ) Azerbaijan International, Vol 14: 4 ( Winter 2006 )

Theories have been proposed about the implications of the descriptions of the temple and the findings ( or lack thereof ) of the archaeological excavations in the area.

Theories about the processes involved in adult face perception have largely come from two sources: research on normal adult face perception and the study of impairments in face perception that are caused by brain injury or neurological illness.

Theories abound about the evolution of the atelines ; one theory is they are most closely related to the woolly spider monkeys ( Bractyteles ), and most likely split from the woolly monkeys ( Lagothrix and Oreonax ) in the South American lowland forest, to evolve their unique locomotory system.

Theories about his disappearance have suggested that he was murdered, that he ran off with another woman, or that he had been involved in corrupt practices which were about to be revealed, and therefore fled.

Theories have been proposed about the possible appearance of Róta in Gesta Danorum and the meaning of her name.

Theories about the optimum span of control go back to V. A. Graicunas.

Theories on the origin of the Welsh Springer Spaniel support this theory, as it is believed that the breed specifically is a direct descendant of the " Agassian hunting dog " described in the hunting poem Cynegetica attributed to Oppian of Apamea, which belonged to the Celtic tribes of Roman-occupied Britain:

Theories of its origin vary.

* Theories as to the origin of the phrase

Theories as to the origin of the name include:

* Theories on the origin of Croats

Theories include that it was named for Louisa County, Virginia, or a corruption of the name of the river (" Levisa ") or that it was named after Louisa Swetnam, one of the first children born in the area to Europeans.

Theories of the derivation of the name ' Gateshead ' include ' head of the ( Roman ) road ' or ' goat ’ s headland ', as the River Tyne at this point was once roamed by goats.

Theories advanced for the meaning of the name include " of Beorna " ( a personal name ), " The Fort of the Warriors " or literally from Latin Bi-cester to mean " The 2 forts ".

Theories also say the name is based on Gnats Cross.

While still a graduate student, Preskill made a name for himself by publishing a paper on the cosmological production of superheavy magnetic monopoles in Grand Unified Theories.

Theories on why Chrysler used the name Fargo include the imagery of open range of the American west, symbolized by the city of Fargo and the Wells-Fargo stage lines, while another theory assumes there was a play on the words " Far " and " Go ", denoting durability.

Theories have abounded, including some which suggest it may indicate the whereabouts of the Holy Grail, an idea fuelled by the Anson family's ancestral ties to the Knights Templar.

Theories suggest she could have been an Egyptian royal by birth, a foreign princess or the daughter of a high government official named Ay, who became pharaoh after Tutankhamun.

Theories, some of them rather bizarre, abound: some contemporary scholars suggest, for example, that the persona may be a woman ; if so, the strangulation could stem from frustration with the world.

Theories suggest the site was dedicated to funerary ritual.

Theories put forward suggest a great storm or tidal wave was the cause and indeed many of the remains appear to have been swept along the sediment, some losing limbs on the way.

Theories more favorable to corporate activities may be praised using the term " sound science ".

Theories as to the cause of the increase are the possibility that the reduction of stomach acid reduces the amount of calcium dissolved in the stomach or that PPIs may interfere with the breakdown and rebuilding of bone by interfering with the acid production of osteoclasts.

Theories may be expressed mathematically, symbolically, or in common language, but are generally expected to follow principles of rational thought or logic.

Theories have been proposed that Víðarr's silence may derive from a ritual silence or other abstentions which often accompany acts of vengeance, as for example in Völuspá and Baldrs draumar when Váli, conceived for the sole purpose of avenging Baldr's death, abstains from washing his hands and combing his hair " until he brought Baldr's adversary to the funeral pyre ".

Theories are supported by evidence from many different sources, and may contain one or several laws.

Theories and practices of folk medicine may influence, or be influenced by, the formalized medicine systems of the same culture.

Theories have been proposed that this description may have some relation to notions of the Jordan River due to phonetic and typological similarities perceived by Eilífr, though there may be no other causative connection.

Theories of truth may be described according to several dimensions of description that affect the character of the predicate " true ".

Theories may be of following kind:

Theories explicitly identifying Hell with an experience of the divine light may go back as far as Theophanes of Nicea.

For a person in an exchange, what he gives may be a cost to him, just as what he gets may be a reward, and his behavior changes less as the difference of the two, profit, tends to a maximum (" Theories Used in Research ").

Sunstein co-authored a 2008 paper with Adrian Vermeule, titled " Conspiracy Theories ," dealing with the risks and possible government responses to false conspiracy theories resulting from " cascades " of faulty information within groups that may ultimately lead to violence.

Such an agreement may be interpreted as an experimentally confirmed qualitative prediction of Grand Unified Theories.

Theories at this level may both reflect and provide insights useful for practice but are not designed for empirical testing.

Theories with asymptotic safety may be well defined at all scales despite being nonrenormalizable in perturbative sense ( according to the classical scaling dimensions ).