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Topic: Grandfather paradox

Related Topics

Time travel

Physical paradox

Predestination paradox

Time loop logic

Paradox

Liar paradox

Ultimate fate of the universe

Chronology protection conjecture

Quantum suicide

Quantum immortality

Fermi paradox

Warp drive

Quantum mechanics

Berry paradox

Theory of relativity

	Paradox - Uncyclopedia, the content-free encyclopedia
		A paradox is not what it is. Kind of like trying to maintain your composure when you are eating steak at your girlfriend's house and you tell her dad that it tastes like beef jerky.
		A Most Ingenious Paradox: This Paradox (a Most Ingenious Paradox):You are the victim of this clumsy arrangement, having been born in leap-year, on the twenty-ninth of February;And so, by a simple arithmetical process, you'll easily discover,That though you've lived twenty-one years, yet, if we go by birthdays, you're only five and a little bit over.
		Paradox (Arizona): A place where conspiracy theorists believe there is an alien base, but it doesn't exist.
	uncyclopedia.org /wiki/Paradox (1396 words)

	Paradox - Wikipedia, the free encyclopedia
		Paradoxes that arise from apparently intelligible uses of language are often of interest to logicians and philosophers.
		Russell's paradox, which shows that the notion of the set of all those sets that do not contain themselves leads to a contradiction, was instrumental in the development of modern logic and set theory.
		Paradoxes which are not based on a hidden error generally happen at the fringes of context or language, and require extending the context or language to lose their paradox quality.
	en.wikipedia.org /wiki/Paradox (931 words)

	Grandfather paradox - Wikipedia, the free encyclopedia
		The paradox, stated in the second person, is this: Suppose you travelled back in time and killed your biological grandfather before he met your grandmother.
		An equivalent paradox is known (in philosophy) as autoinfanticide — that is, going back in time and killing oneself as a baby — though when the word was first coined in a paper by Paul Horwich it was in the malformed version autofanticide.
		One of the main assumptions of the grandfather paradox is that causality is an active physical force which can "follow" a time-traveller back through time.
	en.wikipedia.org /wiki/Grandfather_paradox (3286 words)

	Grandfathers -- Recommendations and Resources (Site not responding. Last check: 2007-10-16)
		It is often used as the verb "to grandfather" or alternatively, as "grandfather clause." Often, such a provision is used as a compromise, to effect new rules without upsetting a well-established physical or political situation.
		But note that to "grandfather in" actually means the opposite; when a new situation comes about that would be to the benefit of a person who would not have qualified.
		Zoning laws often grandfather in existing buildings or other uses, such as when an area is rezoned from residential to commercial, and the existing home on the lot need not be torn down or converted.
	www.becomingapediatrician.com /health/63/grandfathers.html (1136 words)

	Paradox - Veritas
		A paradox is an apparently true statement or group of statements that seems to lead to a contradiction or to a situation that defies intuition.
		The word paradox is often used interchangeably with contradiction; but where a contradiction by definition cannot be true, many paradoxes do allow of resolution, though many remain unresolved or only contentiously resolved (such as Curry's paradox).
		Another much more physical paradox (in the sense that it may in fact be impossible due to certain laws of the universe), is what's known as the grandfather paradox, whereby travelling back in time and killing your own grandfather before he was to meet your grandmother is impossible (following the laws of determinism).
	vsociety.net /index.php?title=Paradox (267 words)

	jk0.org » Grandfather Paradox (Site not responding. Last check: 2007-10-16)
		The grandfather paradox is a paradox of time travel, supposedly first conceived by the science fiction writer René Barjavel in his book “Future times three” (”Le voyageur imprudent”, 1943).
		An equivalent paradox is known (in philosophy) as autoinfanticide–that is, going back in time and killing oneself as a baby–though when the word was first coined in a paper by Paul Horwich it was in the malformed version autofanticide.
		Questions like these lead some back to the simpler idea that time travel is by its very nature paradoxical and therefore logically impossible, on the same order as round squares and portable holes–or at least, impossible under any of the conditions in which human life is thought to be able to exist.
	jk0.org /time/grandfather-paradox (343 words)

	The Pros and Cons of Time Travel (Site not responding. Last check: 2007-10-16)
		Paradoxes can be avoided by use of parallel universes and tangent universe...but I'll save that for another time (no pun intended).
		If one were born in 1986 and went back in time to 1930 and killed his grandfather, then his father would have never been born and he would have never been born.
		A paradox is created because if he was not born, then he could not travel back in time to kill his grandfather.
	www.ucs.louisiana.edu /~rma6878/paradox.html (165 words)

	Paradox
		Paradoxes in general, however, are a different story.
		An unspecified or uncategorized paradox is defined as an apparent contradiction, which exists despite the inclusion of mutually exclusive rules regarding the nature of the subject.
		Thus, each challenge that a time travel paradox poses may potentially reveal the answers we seek, or prove to be simply an exercise in contemplating cosmic conundrums.
	www.umich.edu /~engtt415/paradox (1073 words)

	Introduction to Philosophy:Logic:Paradoxes - Wikibooks, collection of open-content textbooks
		Three such are the predestination paradox, the ontological paradox, and the grandfather paradox.
		This paradox is in some ways the opposite of the grandfather paradox.
		An ontological paradox is similar to a predestination paradox in that it is nested in causation, but raises the ontological questions of where, when and by whom the schematics were created.
	en.wikibooks.org /wiki/Introduction_to_Philosophy:Logic:Paradoxes (656 words)

	Outpost Gallifrey: Articles and Features
		Faction Paradox were fashioned after the "grandfather paradox", the time old theory that going back in time to kill your grandfather would, through causality, avert your own existence.
		Grandfather Paradox was thought to have severed his own arm, essentially severing his ties to the Time Lords.
		Faction Paradox revolted, achieving the impossible, glorifying blood and chaos and things that were impossible under the physical laws of the universe.
	www.gallifreyone.com /article.php?id=faction (4572 words)

	HDR Grandfather Paradox
		According to Steven Gibbs the grandfather paradox does not exist because when you use a time machine to go back in time -- you are going to an alternate timeline.
		The idea of the Grandfather Paradox is that it is not possible to time travel because the chrononaut would be able to go back and remove his grandfather thereby he would never be born and thus the paradox occurs.
		When a time traveller jumps back in time they hit another timeline and thus the grandfather they remove may in fact resemble their own grandfather, but he is different man. Meanwhile, the real grandfather still marries and has kids.
	www.fluxcap.com /hdr_the_grandfather_paradox.htm (539 words)

	Paradoxes (Site not responding. Last check: 2007-10-16)
		Paradoxes are very hard to solve but with the help of quantum theory many of them can be solved.
		You could not be born if your grandfather was killed and if you were not born then he will not be killed.
		When your time machine materialised on top of your grandfather as a boy, a new universe is created where your were never born and did not invent the time machine.
	homepage.eircom.net /~timetravelna/paradoxes.htm (290 words)

	Grandfather paradox - Memory Alpha, the Star Trek Wiki
		The grandfather paradox is a famous thought experiment of temporal mechanics.
		A resolution to this paradoxical situation is to assume the existence of many timelines.
		By killing your grandfather in the past, you would create an alternate timeline in which you don't exist, but without changing your own original timeline.
	www.memory-alpha.org /en/wiki/Grandfather_paradox (398 words)

	Paradoxes - curiouser.co.uk
		Below is a list of paradoxes which you might be interest to research, some of which may be featured at curiouser.co.uk in due course.
		Grandfather paradox: You travel back in time and kill your grandfather before he meets your grandmother, resulting in your never being conceived.
		Low birth weight paradox: low birth weight babies have a higher mortality rate, babies of smoking mothers have lower average birth weight, babies of smoking mothers have a higher mortality rate, but low birth weight babies of smoking mothers have a lower mortality rate than other low birth weight babies.
	www.curiouser.co.uk /paradoxes (549 words)

	Sagan-Time Travel
		Sagan: The grandfather paradox is a very simple, science-fiction-based apparent inconsistency at the very heart of the idea of time travel into the past.
		The heart of the paradox is the apparent existence of you, the murderer of your own grandfather, when the very act of you murdering your own grandfather eliminates the possibility of you ever coming into existence.
		This is sometimes described as the "twin paradox": two identical twins, one of whom goes off on a voyage close to the speed of light, and the other one stays home.
	www.zamandayolculuk.com /cetinbal/SAGANTIMETRAVEL.htm (1940 words)

	Time
		The most prominent is the "grandfather paradox," in which you travel back in time and kill your grandfather before you were born, which means you could not have been born to then travel back in time to kill your grandfather.
		For time travel and the grandfather paradox, a simpler scenario is consider a ball tossed through a wormhole, with an exit wormhole nearby in space.
		Thus no paradox is created, and only the destruction of himself by suicide or personal attack, or his time machine, could see him affected by the outcomes of his actions, and even then no paradox is created.
	zebu.uoregon.edu /~js/cosmo/lectures/lec09.html (2875 words)

	Ex Astris Scientia - Time Travel - General Considerations
		To handle this so-called grandfather paradox was a challenge for many science fiction authors, and almost all of them failed to provide a logically flawless description of the phenomenon.
		The paradox is just not visible to (human) beings that are restricted to the "normal" space-time, although they are the ones who are concerned with it from the viewpoint of the omniscient being.
		Once this paradox occurs, it is virtually impossible for a science fiction author to continue with his story, unless he ignores or even fails to recognize the paradox, which unfortunately happens very often.
	www.ex-astris-scientia.org /treknology/timetravel-general.htm (6759 words)

	FNF: PARADOX SOURCE: Paradox - Wikipedia, the free encyclopedia
		Paradox of Poverty which prevents the reform of monetary systems to permanently solve needless poverty by enabling employment of productive people who are unemployed because of perversions in monetary systems.
		Paradox is a different kind of illusion in that it does not relate directly to observation, but to the causal meaning of observation.
		liar paradox: it is a sentence which cannot be consistently interpreted as true or false, because if it is false it must be true, and if it is true it must be false.
	www.hi.is /~joner/eaps/Paradox.htm (2827 words)

	Paradoxes (Site not responding. Last check: 2007-10-16)
		The premise is that if you can time travel into the past, you could go back and kill your grandfather as a young man. This would mean that your father would never be born, and thus, you would never have been born.
		In which case, you could not have travelled back and killed your grandfather, therefore he would sire your father who would sire you, so then you could go back in time and kill your grandfather, meaning you wouldn't be born.
		The cycle continues and continues: either you are born and go back to kill your grandfather or you're not born and your grandfather lives and you are born, well, you get the point.
	www.usc.edu /dept/LAS/english/courses/dilligan/projectsSp2000/timetravel/paradox.html (736 words)

	blog.kennypearce.net: Foreknowledge, Free Will, and the Grandfather Paradox
		Grandfather died in his bed in 1957, while Tim was a young boy.
		He buys a rifle; he spends long hours in target practice; he shadows Grandfather to learn the route of his daily walk to the munitions works; he rents a room along the route; and there he lurks, one winter day in 1921, rifle loaded, hate in his heart, as Grandfather walks closer, closer,....
		Suppose Grandfather is not his grandfather, but my great-grandfather (my grandfather not having been born in 1921).
	blog.kennypearce.net /archives/philosophy/metaphysics/philosophy_of_mind/free_will/foreknowledge_free_will_and_th_1.html (2665 words)

	Darkphyre's Multiverse \| If I don't have it, it isn't worth knowing!!
		The most frequently encountered Paradox is known as the Grandfather Paradox.
		This could be the time your grandfather was supposed to meet your grandmother, the birth of your father/mother, your birth, or the moment you chose to go back in time.
		Your travelling to the past results in the death of your grandfather, but now two realities exist: one where your grandfather lives (and so do you) and one where he doesn?t (and neither do you).
	www.freewebs.com /darkphyre0/paradox.htm (581 words)

	Grandfather Paradox
		It points out that if you were able to travel into the past you could (if you were so inclined) kill your grandfather when he was very young and thus render your own birth impossible.
		The Grandfather paradox shows how one form of time travel could violate causality by eliminating the cause of a phenomenon that has already taken place in the present.
		The most bizarre adaptation of the Grandfather Paradox is found in Robert Heinlein's classic short story "All You Zombies." A baby girl is mysteriously left at an orphanage in Cleveland in 1945.
	www.daviddarling.info /encyclopedia/G/Grandfather_Paradox.html (561 words)

	Quantum Time Travel
		He, and many others, resisted the time symmetric solution because of another paradox that then raises its head: Time travel would appear to allow you to go back in time and kill your grandfather when he was a child, thereby eliminating the possibility of your existence.
		Thus your grandfather's state is entangled with the states of all the other men his age.
		This is the situation in familiar, macroscopic life; grandfathers and most other objects are composed of many elementary particles that exist in incoherent, mixed states rather than the coherent superpositions that constitute pure quantum systems.
	www.colorado.edu /philosophy/vstenger/Briefs/QuantumTimeTravel.html (910 words)

	Faction Paradox: The Book of the War
		Before the Grandfather’s arrest, members of House Paradox visited 18th-century Earth, the era in which humanity was first becoming aware of Time as a dimension through which movement was possible, and struck a deal with the King of England.
		Since Thessalania’s death was brought about due to her apparently mistaken belief that Faction Paradox was responsible for the VUE on Zo la Domini, it may be worth noting a certain similarity between the downfall of the Order of the Weal and the downfall of the Star Chamber on Earth.
		The fiasco attracted the attention of the House Military, and Faction Paradox cut ties with the Remote, recognising that their own cultural sterility had been a factor in the project’s failure and hoping that the Remote, left to their own devices, would develop into the unpredictable warriors they were originally intended to be.
	www.drwhoguide.com /paradox_n00.htm (11388 words)

	illumin : article : The Science of Time Travel
		The Grandfather Paradox, which must be addressed when discussing time travel, describes the potential problems that can arise from travelling to the past.
		Changing the outcomes of past events leads to what physicists and philosophers refer to as the "Grandfather Paradox," an issue that needs to be addressed in any serious discussion of time travel.
		They reason that when the grandson attempts to murder his grandfather, he fails on all accounts because it is logically impossible to change the past (Riggs).
	illumin.usc.edu /article.php?articleID=72&page=1 (822 words)

	MySpace.com
		You kill your alternate grandfather and the alternate you is never born.
		The supposedly unexplainable 'Grandfather' time problem which would be a paradox I don't think is in any way a problem.
		The Universe between the point your grandfather died and the point you went back in time would be a tangent Universe.
	forum.myspace.com /INDEX.CFM?FUSEACTION=MESSAGEBOARD.VIEWTHREAD&ENTRYID=14784330&CATEGORYID=0&ISSTICKY=0&GROUPID=100000297 (1892 words)

	Mocha Latte - Great Lost Theory
		In the case of the Grandfather Paradox, while they logic is clear, the actual experience of it is a mystery.
		The Grandfather Paradox is the most obvious, but actually only one of many questions.
		If you were to go back in time and kill your grandfather before your parent was born then you would not be born and could, therefore, not go back in time to begin with.
	tekalpha.livejournal.com /314545.html (2326 words)

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