History Main / StableTimeLoop

15th Apr '16 1:39:05 PM DaibhidC
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** The opening story of ''The New Adventures of Literature/BerniceSummerfield: Volume 2 The Triumph of Sutekh'' has Benny discover the Doctor in a Martian pyramid fighting Sutekh for possession of his mind. [[spoiler: Then he dies.]] The final story has [[spoiler: the Doctor, battling Sutekh in the far future, disappear as Sutekh attempts to take over his mind. He then gets pulled out of the loop by Isis, but Sutekh is left to repeat it forever.]]
11th Mar '16 9:09:00 PM Simpson17866
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* In DoctorWho fanfic ''{{FanFic/Gemini}},'' this trope is [[DefiedTrope defied]] by [[InvokedTrope invoking]] TimeyWimeyBall: Itís easier for the Daleks to change the past than it is for anybody else, so the military is trying to create super-soldiers that can change the timeline as easily as the Daleks can.
4th Mar '16 5:03:04 PM ZimFan89
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* In https://www.fanfiction.net/s/9662393/30/Suzie-s-Adventure-World, this is said to have happened with a card exchanged between Suzie and Ryo where the one Ryo gave Suzie is a double of the one she gave him years ago, and she gives it to him in Adventure...

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* In https://www.''[[https://www.fanfiction.net/s/9662393/30/Suzie-s-Adventure-World, net/s/9662393/30/Suzie-s-Adventure-World Suzie's Adventure World]]'', this is said to have happened with a card exchanged between Suzie and Ryo where the one Ryo gave Suzie is a double of the one she gave him years ago, and she gives it to him in Adventure...


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* ''Fanfic/ChildOfTheStorm'' uses one of these to explain why Professor Xavier couldn't [[spoiler: tell Harry about his relationship to Jean]] -- fifty years before the start of the story, he met a time-traveling version of [[spoiler: Harry]] from two years into the story's future, who told him the things he had to do to ensure the closing of the loop (and thus avoiding a dangerous paradox), including swearing everyone present to secrecy until such time as Xavier could give present-day [[spoiler: Harry]] a letter from his future self, that he remembered receiving from Xavier. [[TimeTravelTenseTrouble Discussing this sequence of events gives everyone a headache.]]
2nd Jan '16 8:00:25 PM Jgamer
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* The [[spoiler: True]] Ending of ''VisualNovel/SteinsGate'' reveals that one of these [[spoiler: has been ongoing the entire game. The whole plot starts with Okabe seeing Kurisu dead in a pool of blood, causing him to accidentally send the first D-Mail and reach the Alpha [[AlternateTimeline world line]], where most of the plot takes place and Okabe gets to fall in love with the now living Kurisu. However, in the end, Okabe returns to the Beta world line, where the story started, but has to save Kurisu from her death at the beginning and stop World War III from breaking out. To do this, he lets himself get stabbed in Kurisu's place and then knocks out Kurisu and uses his blood to to recreate the scene his past self originally saw. Thus, Kurisu lives, and Okabe still goes through the events of the visual novel which ultimately lead to him working to save Kurisu.]]
25th Dec '15 11:34:47 PM Meneth
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[[folder: Real Life]]
* You never thought you'd see it, but some non-trivial physicists are [[http://www.nytimes.com/2009/10/13/science/space/13lhc.html?_r=2 wondering]] [[http://io9.com/5380647/is-the-large-hadron-collider-being-sabotaged-from-the-future aloud]] whether the future is [[SetRightWhatOnceWentWrong actively trying to scuttle]] the LHC research project. The string of mechanical difficulties, they say, may be more than mere chance: Whether through [future] human intervention or the universe itself exercising some form of upstream-acting OntologicalInertia, the future is trying to make sure we don't mess with Higgs Bosons. Loopy? Literally. Crazy? Probably. Impossible? Well...
** [[WesternAnimation/{{Futurama}} Mumbo? Perhaps. Jumbo? Perhaps not!]]
* In terms of the theory of relativity, time travel would take the appearance of a ''closed timelike curve'', which is a series of events returning to its starting point -- such as time travel returns to the past. That leads to the inevitable paradoxes, but some solutions claim that if time travel is possible at all, it's only possible in a stable form: the only form of time travel possible generates one.
** While that may seem supremely useless -- what good is a time machine if it can't change anything? -- that's not really true. A computer that could only build Stable Time Loops could run algorithms like "open time communication channel to 5 minutes into the future, receive answer from future, close channel, check answer (which takes 5 minutes in this example), if correct, send answer over the communication channel that was now just opened, if incorrect send different answer to past over the same communication channel", and then consistency would force the algorithm to return the output to some given puzzle. This is known as Time Loop Logic. Receiving an incorrect answer from the future would cause a paradox, and thus is impossible. Therefore either the answer will never arrive, or you will have created an ontological paradox, fabricating the answer from nowhere. The step of checking the answer is required for the algorithm to work.
*** Less esoterically/more science-fictionally, a time machine that can't change anything would also be just dandy for observation, thanks. (Better, really, since you don't risk stepping on the ButterflyOfDoom.) Video from 20,000BC anyone?
**** Creator/IsaacAsimov and Creator/ArthurCClarke both [[http://en.wikipedia.org/wiki/The_Dead_Past tried]] [[http://en.wikipedia.org/wiki/The_Light_of_Other_Days that]]. Problem is, the past starts a microsecond ago, so it effectively ends any notion of privacy.
**** Creator/ReginaldBrettnor mentioned the same idea in "These Stones Will Remember". Unlike the Asimov and Clarke stories, this wasn't the primary purpose of the device.
* There is apparently a theory out there that human time travellers seeded the young planet Earth with life. This is sometimes known as the [[FunWithAcronyms Completely Ridiculous Anthropic Principle]].
* Some theories of particle physics hold that antiparticles (particles with the opposite charge and parity of a "standard" particle) travel backward through time. It's also widely believed that particle-antiparticle pairs randomly pop into existence from the [[http://en.wikipedia.org/wiki/Quantum_foam Quantum Foam]], and then feel their mutual attraction and annihilate each other moments later. It's also possible to see this as a single particle traveling in a loop through time: Forward as a regular particle to annihilate with its antiparticle, then backward as its antiparticle to annihilate with its standard particle, and repeat.
* A few theories state that, assuming time travel is possible, the big bang could have occurred by sending a time machine back to the starting point of the big bang, which would be a void before 'existence'. The sudden appearance of matter would then trigger the big bang, causing us to exist and said time machine to be constructed.
** [[FridgeBrilliance Which would explain why there is more matter than anti-matter: Matter was here first!]]
* There is another theory that says that if time travel is possible, it is only forward time travel -- theoretically caused by time dilation when approaching the speed of light. The other way says that time machines are possible but that you can only travel to when the time machine was first activated and any time after that, but not before. That would explain why they aren't hundreds of time travelers at every major event in history... yet.
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16th Dec '15 4:29:30 PM Twerty
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This is sometimes referred to as a "time loop" paradox, particularly when a character, object, or piece of information was never originally created, but exists solely because of its own existence. Also known as a "bootstrap paradox," from the classic Heinlein short story, ''Literature/ByHisBootstraps''. It's also called a "TemporalParadox" or "ontological paradox". The classic hypothetical example is to jump into the future, steal some wondrous gadget, come back to the original time, grab the patent on that gadget and start mass-producing them immediately. Eventually, they become so ubiquitous or so common that you, ten, twenty years younger, show up and steal one. The simplest version is the one where the time machine itself is the product of the stable time loop -- the character sees a version of himself pop into existence with a time machine, hand it to him, and press the button, only to be whisked into the past where he hands it to his past self and presses the button[[note]]This exact example is also an Object Paradox, wherein the time machine has no past and no future outside the loop, no orogin, and somehow never decays or suffers wear and tear[[/note]].

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This is sometimes referred to as a "time loop" paradox, particularly when a character, object, or piece of information was never originally created, but exists solely because of its own existence. Also known as a "bootstrap paradox," from the classic Heinlein short story, ''Literature/ByHisBootstraps''. It's also called a "TemporalParadox" or "ontological paradox". The classic hypothetical example is to jump into the future, steal some wondrous gadget, come back to the original time, grab the patent on that gadget and start mass-producing them immediately. Eventually, they become so ubiquitous or so common that you, ten, twenty years younger, show up and steal one. The simplest version is the one where the time machine itself is the product of the stable time loop -- the character sees a version of himself pop into existence with a time machine, hand it to him, and press the button, only to be whisked into the past where he hands it to his past self and presses the button[[note]]This exact example is also an Object Paradox, wherein the time machine has no past and no future outside the loop, no orogin, origin, and somehow never decays or suffers wear and tear[[/note]].
12th Dec '15 3:24:33 PM desdendelle
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* [[ProtectorsofthePlotContinuum Protectors of the Plot Continuum]] agents Rina Dives and the Reader experience this: [[spoiler: the Reader discovers the [[EmergencyTransformation human-turned Time Lord]] Rina is actually her old nanny from [[DoctorWho Gallifrey]] who helped her escape the Time War, which led to her finding the PPC and subsequently meeting Rina, who was still basically a child and had yet to run away and end up on the Reader's home planet. The Reader ends up desperately trying to not let anyone know of what will have to happen in order to make sure time doesn't collapse.]] It leads to a lot of stress for both parties when they discover the other's deception.

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* [[ProtectorsofthePlotContinuum Protectors of the Plot Continuum]] WebOrigianl/ProtectorsOfThePlotContinuum agents Rina Dives and the Reader experience this: [[spoiler: the Reader discovers the [[EmergencyTransformation human-turned Time Lord]] Rina is actually her old nanny from [[DoctorWho Gallifrey]] who helped her escape the Time War, which led to her finding the PPC and subsequently meeting Rina, who was still basically a child and had yet to run away and end up on the Reader's home planet. The Reader ends up desperately trying to not let anyone know of what will have to happen in order to make sure time doesn't collapse.]] It leads to a lot of stress for both parties when they discover the other's deception.
10th Dec '15 11:41:51 AM Iximaz
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* [[ProtectorsofthePlotContinuum Protectors of the Plot Continuum]] agents Rina Dives and the Reader experience this: [[spoiler: the Reader discovers the [[EmergencyTransformation human-turned Time Lord]] Rina is actually her old nanny from [[DoctorWho Gallifrey]] who helped her escape the Time War, which led to her finding the PPC and subsequently meeting Rina, who was still basically a child and had yet to run away and end up on the Reader's home planet. The Reader ends up desperately trying to not let anyone know of what will have to happen in order to make sure time doesn't collapse.]] It leads to a lot of stress for both parties when they discover the other's deception.
18th Oct '15 9:51:14 PM Devonaster
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* In the ''[[http://www.mspaintadventures.com/?s=6 Homestuck]]'' fanfiction [[http://archiveofourown.org/works/1026527 ''Hopeless and Heartless'']]. there are several examples of stable time loops, all revolving around Dirk Strider's actions [[spoiler: as the result of a ''PortalToThePast.'' It is revealed that Dirk is actually his own older brother (and subsequently the guardian who raised his younger self) ''Main/BecauseDestinySaysSo,''. In order to avoid creating a paradox, Dirk is forced to remain in the past and send Jake English, the love of his life, back to the distant future, creating a 1,00 year gap between them. ]] See also: ''IChooseToStay'' and''LoveTranscendsSpacetime.''

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* In the ''[[http://www.mspaintadventures.com/?s=6 Homestuck]]'' fanfiction [[http://archiveofourown.org/works/1026527 ''Hopeless and Heartless'']]. there are several examples of stable time loops, all revolving around Dirk Strider's actions [[spoiler: as the result of a ''PortalToThePast.'' It is revealed that Dirk is actually his own older brother (and subsequently the guardian who raised his younger self) ''Main/BecauseDestinySaysSo,''. In order to avoid creating a paradox, Dirk is forced to remain in the past and send Jake English, the love of his life, back to the distant future, creating a 1,00 year gap between them. ]] See also: ''IChooseToStay'' and''LoveTranscendsSpacetime.and ''LoveTranscendsSpacetime.''
18th Oct '15 9:39:50 PM Devonaster
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* In the ''[[http://www.mspaintadventures.com/?s=6 Homestuck]]'' fanfiction [[http://archiveofourown.org/works/1026527 ''Hopeless and Heartless'']]. Dirk Strider works for his Bro (who raised him and his younger brother Dave) at a demon hunting business dubbed "Haven," where they strive to remove the more heinous of their kind from the mortal realm. When his partner and best friend sacrifices herself to save him during a mission, Bro gives him a new partner, Jake English, whom he eventually falls in love with. There are several examples of Stable Time Loops in the story, all revolving around the fact that [[spoiler: as the result of a ''PortalToThePast'' and ''Main/BecauseDestinySaysSo,'' Dirk is actually his own older brother. In order to avoid a temporal paradox, Dirk is also [[/IChooseToStay ''forced to send Jake to the distant future'']], creating a 1,00 year gap between them. ]] See also: ''YouAreWorthHell'' and''LoveTranscendsSpacetime.''

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* In the ''[[http://www.mspaintadventures.com/?s=6 Homestuck]]'' fanfiction [[http://archiveofourown.org/works/1026527 ''Hopeless and Heartless'']]. Dirk Strider works for his Bro (who raised him and his younger brother Dave) at a demon hunting business dubbed "Haven," where they strive to remove the more heinous of their kind from the mortal realm. When his partner and best friend sacrifices herself to save him during a mission, Bro gives him a new partner, Jake English, whom he eventually falls in love with. There there are several examples of Stable Time Loops in the story, stable time loops, all revolving around the fact that Dirk Strider's actions [[spoiler: as the result of a ''PortalToThePast'' and ''Main/BecauseDestinySaysSo,'' ''PortalToThePast.'' It is revealed that Dirk is actually his own older brother. brother (and subsequently the guardian who raised his younger self) ''Main/BecauseDestinySaysSo,''. In order to avoid creating a temporal paradox, Dirk is also [[/IChooseToStay ''forced forced to remain in the past and send Jake English, the love of his life, back to the distant future'']], future, creating a 1,00 year gap between them. ]] ]] See also: ''YouAreWorthHell'' ''IChooseToStay'' and''LoveTranscendsSpacetime.''
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