Two of the popular theories are:

Two rival theories to account for the relationship between change and identity are Perdurantism, which treats the tree as a series of tree-stages, and Endurantism, which maintains that the tree — the same tree — is present at every stage in its history.

John Locke incorporated natural law into many of his theories and philosophy, especially in Two Treatises of Government.

Two discrete, sociological theories explain and justify gentrification as an economic process ( production-side theory ) and as a social process ( consumption-side theory ) that occurs when the suburban gentry tire of the automobile-dependent urban sprawl style of life ; thus, professionals, empty nest aged parents, and recent university graduates perceive the attractiveness of the city center — earlier abandoned during white flight — especially if the poor community possesses a transport hub and its architecture sustains the pedestrian traffic that allows the proper human relations impeded by ( sub ) urban sprawl.

Two theories of origins have attempted to explain the common elements in fairy tales found spread over continents.

Two leading theories about objecthood are substance theory, wherein substances ( objects ) are distinct from their properties, and bundle theory, wherein objects are no more than bundles of their properties.

Two contradicting theories exist to explain the origins of conjoined twins.

Two progressives, professor Robert Jensen and journalist Norman Solomon, resigned from Project Censored's panel of national judges over the decision to highlight the 9 / 11 conspiracy theories of Steven E. Jones, a founder of Scholars for 9 / 11 Truth, in Censored 2007.

Two main theories of the process of recall are the Two-Stage Theory and the theory of Encoding Specificity.

Two theories in particular were influential, the " Frontier Thesis " and the " Sectional Hypothesis ".

* Age Of The Sphinx, a BBC Two Timewatch documentary presenting the theories of John Anthony West and critical to both sides of the argument, was shown on 27 November 1994.

Two major theories of optics appear in the writings of al-Kindi ; Aristotelian and Euclidian.

Two complementary theories of color vision are the trichromatic theory and the opponent process theory.

One of the dominant theories as regards the value or importance of Two Gentlemen is that thematically, it represents a ' trial run ' of sorts, in which Shakespeare deals briefly with themes which he would examine in more detail in later works.

Two basic theories can be differentiated ( the " theory of the Daco-Romanian continuity " and the " immigrationist theory "), but interim theories also exist.

Two conflicting theories theories exist as to the date of Vologda's foundation.

Two theories exist to explain runaway selection.

Two examples of trait and factor theories, also known as person – environment fit, are Holland's Theory and Theory of Work Adjustment.

Two of the theories are extreme positions, while the third attempts to find a middle ground between the former two.

Two theories on the formation of the caldera exist.

Two major theories are used here ; Classical test theory ( CTT )- used for the observed score ( see Lord and Novick, 1968 ), and item response theory ( IRT )- " a family of models for persons ' responses to items " ( Mellenbergh, 2008 ); see Hamleton and Swaminathon ( 1985 ) for a full summary of IRT.

There are some theories about the origin of this word, one claims it means: Po: Two ; Pa: Straw ; Yan: Village, or Two Villages with Straw Roofs.

Gilliam also attempted to direct a version of Charles Dickens's A Tale of Two Cities, which collapsed due to disagreements over its budget and choice of lead actor.

Section Two also requires direct taxes to " be apportioned among the several States ... according to their respective Numbers " and that a census be held every ten years.

Two of his direct descendants attended the ceremony: Dominic, his great-great-grandson ; and George, Dominic's son.

In Hong Kong, those early think tanks established in the late 1980s and early 1990s focused on the political development including first direct Legislative Council members election in 1991 and the political framework of " One Country, Two Systems " manifested in the Sino-British Joint Declaration.

Two years later, Altman was hired to direct the low-budget space travel feature Countdown, but was fired within days of the project's conclusion because he had refused to edit the film to a manageable length.

Terry Hughes directed most of the episodes, and would later direct The Two Ronnies, The Golden Girls and 3rd Rock from the Sun.

* Two points are awarded for a score direct form a sideline cut ( since March 2012 )

Two leading forms of direct democracy are participatory democracy and deliberative democracy.

Two recent studies ( one a meta-analysis ) involving direct comparisons of multiple EI tests yielded very favorable results for the TEIQue.

Two miles south of town off Missouri Highway 100 West is Adam Puchta Winery, the oldest continuously family-owned winery in the nation, under direct family ownership since 1855.

Two direct trains to from Bridgnorth operated by Chiltern Railways ran in 2009, one on August 15 and one on November 28.

Two personalities of direct significance for Cui were women who were specially devoted to his music.

Two trees that shade the stone are said to be direct descendants of Newton ’ s famous apple tree.

Two of three thyristor valve stacks used for long distance transmission of power from Manitoba Hydro damsSince modern thyristors can switch power on the scale of megawatts, thyristor valves have become the heart of high-voltage direct current ( HVDC ) conversion either to or from alternating current.

Two Indonesian airlines are considering the opportunity to open a direct flight from Yogyakarta, Indonesia to Siem Reap.

Two years later, the retired Emperor Go-Fukakusa ended his reign as Cloistered Emperor, and Fushimi took direct control.

The paper never missed an issue throughout the Siege of Malta in World War Two, despite taking direct hits on several occasions.

* Two of Japan's largest cities-Tokyo and Osaka-will be connected by a direct high-speed maglev route.

Two years later, the word " international " was added to the airport's name as Northwest Airlines began direct service to Tokyo, Japan.

Two routes were suggested for the British Section, a western route of about from the tip of Kowloon peninsula via Tsuen Wan to Castle Peak Bay and thence to Yuen Long and the border with China, and a more direct eastern route of about requiring tunnelling through the Kowloon hills and thence to the border via Tide Cove ( now Sha Tin area ), Tai Po, Fanling and Sheung Shui.

Two years later in 1899 " The London Extension " was officially opened to passenger and freight traffic, allowing more direct journeys from the capital to Nottingham, Leicester, Sheffield and Manchester.

Davis would direct one other Goofy Gophers short, 1948's " Two Gophers from Texas ".

Two other issues that must be considered in setting up an absorption spectroscopy experiment include the optics used to direct the radiation and the means of holding or containing the sample material ( called a cuvette or cell ).

Two paths of a P-wave, one direct and one refracted as it crosses the Moho.