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| {{other uses |Presentism (literary and historical analysis)}} | |||
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| '''Presentism''' is the philosophical doctrine that only events and entities—and, in some versions of presentism, timeless objects or ideas like numbers and sets—that occur in the present exist. According to presentism, events and entities that are wholly past or wholly future do not exist at all. Presentism contrasts with ] and the ], both of which hold that past events, like the ], and past entities, like ]'s warhorse ], really do exist, though not in the present; eternalism alone extends this to future events as well. | |||
| ] proposed that the present is a knife edge between the past and the future and could not contain any extended period of time. This seems ] because, if the present is extended, it must have separate parts – but these must be ] if they are truly part of the present. According to early philosophers, time cannot be both past and simultaneously present, so it is not extended. Contrary to Saint Augustine, some philosophers propose that conscious experience is extended in time. For instance, ] said that time is "the short duration of which we are immediately and incessantly sensible".<ref>{{cite book| last = James | first = William | title = The Principles of Psychology | publisher = Henry Holt and Company | volume = 1 | date = 1890 | location = New York | pages = 631 | url = https://archive.org/stream/principlesofpsyc001jame#page/631 }}.</ref> Other early presentist philosophers include the ] tradition. ], a leading scholar from the modern era on ], has written extensively on Buddhist presentism: "Everything past is unreal, everything future is unreal, everything imagined, absent, mental... is unreal... Ultimately real is only the present moment of physical ] ]]."<ref>{{Citation | volume = 1 | title = Buddhist Logic | year = 1962 | publisher = Dover | place = New York | pages = 70–1}}.</ref> | |||
| According to ]'s '']'', there are two ways of referring to events: the ] (or 'tensed time': ], ], ]) and the ] (or 'untensed time': Monday, Tuesday, Wednesday). Presentism entails that the A Series is fundamental and that the B Series alone is not sufficient. Presentists maintain that temporal discourse requires the use of tenses, whereas the "Old B-Theorists" argued that tensed language could be reduced to tenseless facts (Dyke, 2004). | |||
| Arthur Prior has argued against untensed theories as follows: the meaning of statements such as "Thank goodness that's over" is much easier to see in a tensed theory with a distinguished, present Now.<ref>{{cite journal| last = Prior |first= Arthur| title= Thank goodness that's over| journal= Philosophy|date=January 1959 | volume = 34 | issue= 128| pages= 12–17 | doi=10.1017/s0031819100029685}}</ref> Similar arguments can be made to support the theory of ] (or ]), which holds that there is a distinguished, present Self. | |||
| In the modern ], the conceptual ] is at a ] in both space and time at the apex of the ']' which observes events laid out in time as well as space. Different observers can disagree on whether two events at different locations occurred simultaneously depending if the observers are in relative motion (see ]). This theory depends upon the idea of time as an extended thing and has been confirmed by experiment, thus giving rise to a philosophical viewpoint known as ]. However, although the contents of an observation are time-extended, the conceptual observer, being a geometric point at the origin of the light cone, is not extended in time or space. This analysis contains a ] in which the conceptual observer contains nothing, even though any real observer would need to be the extended contents of an observation to exist. This paradox is partially resolved in Relativity theory by defining a ']' to encompass the measuring instruments used by an observer. This reduces the time separation between instruments to a set of constant intervals.{{Sfn | Petkov | 2005}} | |||
| Some of the difficulties and paradoxes of presentism can be resolved by changing the normal view of time as a container or thing unto itself and seeing time as a measure of changing spacial relationships among objects; thus observers need not be extended in time to exist and be aware, but rather they exist and the changes in internal relationships within the observer can be measured by stable countable events. | |||
| ==See also== | |||
| * ] | |||
| * ]s | |||
| * ] | |||
| * ] | |||
| * ] | |||
| * ] | |||
| * ] | |||
| * ] | |||
| * ] | |||
| ==References== | |||
| {{reflist |64em}} | |||
| ==External links== | |||
| * {{Citation | url = http://philsci-archive.pitt.edu/525/1/presentism_and_relativity.pdf | last1 = Balashov | first1 = Y | last2 = Janssen | first2 = M | year = 2002 | title = Presentism and Relativity | type = preprint of article | journal = British Journal for the Philosophy of Science | publisher = Pitt | format = ]}}. | |||
| * {{Citation | url = http://www.oup.com/uk/catalogue/?ci=9780199212804 | last = Bourne | first = Craig | year = 2006 | title = A Future for presentism | place = Oxford | publisher = Oxford University Press | ISBN = 978-0-19-921280-4}}. | |||
| * {{Citation | archiveurl = http://web.archive.org/web/20091026220944/http://www.geocities.com/trolleylauncher/AJPPresentismConsciousnessFinalVersion.htm | last = McKinnon | first = N | year = 2003 | title = Presentism and Consciousness | journal = Australasian Journal of Philosophy | volume = 81 | issue = 4 | page = 305 | archivedate = 2009-10-26 | url = http://www.geocities.com/trolleylauncher/AJPPresentismConsciousnessFinalVersion.htm | publisher = Yahoo! | format = Geocities}}. | |||
| * {{Citation | url = http://philsci-archive.pitt.edu/archive/00002408/ | first = Vesselin | last = Petkov | year = 2005 | title = Is There an Alternative to the Block Universe View? | publisher = Pitt}}. | |||
| * {{Citation | url = http://www.nd.edu/~mrea/Online%20Papers/Four%20Dimensionalism.pdf | format = PDF | publisher = ND | contribution = Four Dimensionalism | first = MC | last = Rea | title = The Oxford Handbook for Metaphysics}}. Describes Presentism and how four dimensionalism contradicts it. | |||
| {{Time Topics}} | |||
| {{Time in philosophy}} | |||
| ] | |||
| ] | |||
| ] | |||
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