DOCSLIB.ORG

Five Features of Multiverse Time Travel: How Past Paradoxes Can Be Avoided in the Future

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Five Features of Multiverse Time Travel: How Past Paradoxes Can Be Avoided in the Future JOURNAL OF SCIENCE FICTION Volume 2, Issue 1, September 2017 ISSN 2472-0837 Five Features of Multiverse Time Travel: How Past Paradoxes Can Be Avoided in the Future Morgan Luck, Charles Sturt University Abstract: The aim of this paper is to help construct coherent time travel narratives by establishing five features of multiverse time travel. To this end, multiverse time travel will be contrasted to fixed-universe time travel, and both versions related to various cases - where each case is designed to illustrate a key feature of multiverse time travel. Keywords: time travel; multiverse; fixed universe; narratives; paradoxes 1.0 - Introduction Although there has been growing philosophical el are introduced. It is these types of problems treatment of multiverse time travel (Abbruzzese, that writers may wish to avoid, consumers may 2001; Effingham, 2012), no work has been solely wish to spot, and scholars may wish to study; dedicated to a formulation of the key features this paper aims to help us in these respects. of this type of time travel. This paper aims to However, just as importantly, this paper also aims redress this vacuum by establishing five key to encourage discussion on some interesting, features of multiverse time travel. These features and subtle, distinctions between different types are established to help the construction of more of multiverse time travel that have not yet been coherent multiverse time travel narratives. That given adequate attention. is, it is hoped that if fictional worlds are con- structed with these features in mind, they will We begin with a brief overview of a well-known avoid inconsistencies common to such worlds. To time travel paradox, the grandfather paradox. We this end, multiverse time travel will be contrasted shall use this paradox to introduce and contrast to fixed-universe time travel, and both versions fixed-universe and multiverse time travel. We related to various cases - where each case is de- shall also discover why Superman’s efforts to signed to introduce one, or more, key features of save Lois Lane are thwarted under both theories multiverse time travel. of time travel. To help illustrate why identifying such features 2.0 – The grandfather paradox might be important to creators, consumers, and scholars of time travel narratives, consider the The grandfather paradox can be presented as following simple, and typical, example of time follows: travel from the popular 1978 film Superman. In this film Lois Lane (with whom Superman is in If you could travel into the past then you love) is killed. Consequently, Superman goes could kill your own grandfather at a time 1 back in time and saves her. Despite its simplic- before your father’s conception, so prevent- ity, there are problems this narrative; problems ing your own birth, which would prevent you that render it impossible for Superman to save from traveling into the past, and so prevent Lois under either multiverse or fixed-universe you from killing your grandfather before your time travel. These problems will be made clear in father’s conception. the next section, after both theories of time trav- 54 JOURNAL OF SCIENCE FICTION Volume 2, Issue 1, September 2017 ISSN 2472-0837 Five Features of Multiverse Time Travel, continued This case highlights the notion that backwards According to fixed-universe time travel, if you time travel seems paradoxical - it appears to were to travel back in time intent on killing your both allow and deny the same event (the killing grandfather before your father’s conception, you of your grandfather). It is because of this ap- would fail. Although killing your grandfather may parent paradox that some have argued against be something well within your power to accom- the possibility of time travel (Mellor, 1998, p. 135; plish, you will not. The facts are determined to Hawking, 1992, p. 604). The simplest form of this stop you. For example, although you could travel argument can be presented as follows, back in time, locate your grandfather, and line up a lethal shot with your rifle, the rifle would jam, or 1. If backwards time travel is possible, then a you would have a heart attack, or you would slip paradox is possible. on a banana peel, and so on; and these defeat- ing factors will continue to pop up for as long as 2. It is not the case that a paradox is possible. you keep attempting the feat (Goddu, 2007). (It is because you are completely unable to kill your So, grandfather that Deutsh and Lockwood (1994) have argued that fixed-universe time travel invalidates the Feature of Autonomy. According 3. It is not the case that backwards time trav- to this feature it should be “possible to create in el is possible. our immediate environment any configuration of matter that the laws of physics permit locally, Most analytic philosophers take the truth of without reference to what the rest of the uni- 2 Premise 2 for granted. So, on the assumption verse may be doing” (p. 71)) that backwards time travel could occur (or one wishes to construct a coherent time travel narra- In short, nothing a backwards time traveller does tive), one must reject Premise 1 of this argument. in the past can alter it. This is what it means for a universe to be fixed – all the events are fixed, that A common objection to Premise 1 is that it is is, unalterable. Or, put another way, everything not traveling back in time itself that gives rise a backwards time traveller does in the past has potential paradoxes. It is altering the past that already occurred that way. This is why narratives does so. As a consequence a number of different that involve changing the past cannot occur versions of time travel have arisen that allows under fixed-universe time travel. So, although one to travel backwards in time, but not alter Superman might be permitted to travel back in the past. In this paper, we will focus on two of time, under fixed-universe time-travel he would these: fixed-universe time travel and multiverse be unable (contrary to the film) to save Lois time travel. Let us begin with fixed-universe time Lane. Narratives that operate under fixed-uni- travel. verse time travel will be more akin the 1995 film Twelve Monkeys, where the actions of the pro- Although the focus of this paper is not on tagonist James Cole (portrayed by Bruce Willis) fixed-universe time travel, a very brief introduc- fail to cause any deviation from a future that tion to this version of time travel may help, as a must come to pass. counterpoint, to better illustrate multiverse time travel. According to fixed-universe time travel, all Fixed-universe time travel denies the truth of past events are fixed in time (Dwyer, 1975; Lewis, Premise 1 of the argument against time travel by 1976; Brown, 1992; Vihvelin, 1996). So if an event providing the conditions under which time travel occurs, it is set in stone. The past is unalterable. is possible, but a paradox is not. That is, traveling (In some versions it is not only the past that is back in time is not possibly paradoxical, provid- fixed, but all present and future events also.) ing the past is not altered. Let us now contrast 55 JOURNAL OF SCIENCE FICTION Volume 2, Issue 1, September 2017 ISSN 2472-0837 Five Features of Multiverse Time Travel, continued this version of time travel to multiverse time The grandfather paradox was introduced to help travel. illustrate some important features of multiverse time travel.3 The three key features introduced by An alternative version of backwards time travel this example are as follows. is multiverse time travel. It, too, rejects Premise 1 of the argument against backwards time travel Multiverse time travel: If, at time (t), x time travels by asserting that altering the past (i.e. one’s own to some prior instant (t-y), then: past) is impossible. However, it still allows for the possibility that one might cause events that did (a) x departs from Universe A at t, and ar- not occur in one’s own past, to occur in a past rives in Universe B at t-y; qualitatively identical to your own, up until the moment you change it. (b) Universes A and B are qualitatively identi- cal up until t-y; According to multiverse time travel, when a time traveller travels back in time, they don’t arrive in (c) at t-y, the only difference between Uni- the past of their universe (that is, the universe verses A and B is that x is present in B, but from which they came). Rather, the act of their not in A. travelling back locates them in a child universe. This child universe is qualitatively identical to the In order to help us flesh out further key features parent universe the time traveller departed from, of multiverse time travel, we shall now examine up until the moment they arrive, and from then some further cases. The next case is the boot- on it is different. For example, if a time traveller strap paradox. goes back in time one hour, say from 2:00pm to 1:00pm, they depart the parent universe 3.0 – The bootstrap paradox at 2:00pm and arrive in the child universe at 1:00pm, where both parent and child universes are qualitatively identical up until 1:00pm. Consider the following case: Like fixed-universe time travel, if you were to An older version of yourself arrives from the decide to go back in time to kill your grandfather future and gives you the plans to build a time before your father’s conception, you would, again machine and then disappears.
Load more

Recommended publications
  • H. G. Wells Time Traveler
    Items on Exhibit 1. H. G. Wells – Teacher to the World 11. H. G. Wells. Die Zeitmaschine. (Illustrierte 21. H. G. Wells. Picshua [sketch] ‘Omaggio to 1. H. G. Wells (1866-1946). Text-book of Klassiker, no. 46) [Aachen: Bildschriftenverlag, P.C.B.’ [1900] Biology. London: W.B. Clive & Co.; University 196-]. Wells Picshua Box 1 H. G. Wells Correspondence College Press, [1893]. Wells Q. 823 W46ti:G Wells 570 W46t, vol. 1, cop. 1 Time Traveler 12. H. G. Wells. La machine à explorer le temps. 7. Fantasias of Possibility 2. H. G. Wells. The Outline of History, Being a Translated by Henry-D. Davray, illustrated by 22. H. G. Wells. The World Set Free [holograph Plain History of Life and Mankind. London: G. Max Camis. Paris: R. Kieffer, [1927]. manuscript, ca. 1913]. Simon J. James is Head of the Newnes, [1919-20]. Wells 823 W46tiFd Wells WE-001, folio W-3 Wells Q. 909 W46o 1919 vol. 2, part. 24, cop. 2 Department of English Studies, 13. H. G. Wells. Stroz času : Neviditelný. 23. H. G. Wells to Frederick Wells, ‘Oct. 27th 45’ Durham University, UK. He has 3. H. G. Wells. ‘The Idea of a World Translated by Pavla Moudrá. Prague: J. Otty, [Holograph letter]. edited Wells texts for Penguin and Encyclopedia.’ Nature, 138, no. 3500 (28 1905. Post-1650 MS 0667, folder 75 November 1936) : 917-24. Wells 823 W46tiCzm. World’s Classics and The Wellsian, the Q. 505N 24. H. G. Wells’ Things to Come. Produced by scholarly journal of the H. G. Wells Alexander Korda, directed by William Cameron Society.
    [Show full text]
  • |||GET||| a Book That Was Lost Thirty-Five Stories 1St Edition
    A BOOK THAT WAS LOST THIRTY-FIVE STORIES 1ST EDITION DOWNLOAD FREE Alan Mintz | 9781592642540 | | | | | The First Forty Nine Stories Hemingway Ernest 9780353247529 Adler Transcript of the original source. Nevertheless, the editors steadfastly maintain that average readers are capable of understanding far more than the critics deem possible. See also: Outline of science fiction. Wright, who drove a cab. Retrieved 27 February There was also a tanning bed used in an episode, a product that wasn't introduced to North America until Hollywood, here I come! Understanding Kurt Vonnegut. Conventions in fandom, often shortened as "cons," such as " comic-con " are held in cities around the worldcatering to a local, regional, national, or international membership. Neo-Fan's Guidebook. They also tend to support the space program and the idea of contacting extraterrestrial civilizations. Chicago Sun-Times. Retrieved 10 April Further information: Skiffy. Mary Shelley wrote a number of science fiction novels including Frankenstein; or, The Modern Prometheusand is considered a major writer of the Romantic Age. Science fiction at Wikipedia's sister projects. Escapist Magazine. I feel that with being a parent. Atlas Obscura. You want to see some jazz? The character, a peripheral one at first, became central. Views Read Edit View history. Feldman urged him to stay. Joining the Marines gave Driver a sense A Book That Was Lost Thirty-Five Stories 1st edition purpose and some distance from his conservative religious upbringing. Faster-than-light communication Wormholes. Respected authors of mainstream literature have written science fiction. Retrieved 4 March Wolfe, Gary K. Science fiction portal. This was almost certainly a cost-saving measure.
    [Show full text]
  • Tech Mahindra15mar21
    India Equity Research | Information Technology © March 15, 2021 Flash Note Emkay Tech Mahindra Your success is our success Refer to important disclosures at the end of this report CMP Target Price Rs 1,003 Rs 1,170 (■) as of (March 15, 2021) 12 months Perigord to augment capabilities in Rating Upside HLS vertical BUY (■) 16.6 % This report is solely produced by Emkay Global. The . Tech Mahindra has agreed to acquire a 70% stake in Ireland-based Perigord Asset following person(s) are responsible for the production of the recommendation: Holdings (Perigord), a digital workflow and artwork, labelling and BPO services firm, for a cash consideration of EUR21mn (~1.5x EV/Sales on TTM basis). Tech Mahindra will Dipesh Mehta acquire the remaining 30% stake in the next four years at valuation linked to the financial [email protected] +91 22 6612 1253 performance of Perigord. Monit Vyas . Deal rationale: This acquisition will strengthen Tech Mahindra’s platform-led BPaaS [email protected] offerings, expand its global footprint and bolster its capabilities in the digital supply chain +91 22 6624 2434 in the global pharmaceutical, healthcare and life science (HLS) market. It will strengthen Tech Mahindra’s position as a leading digital transformation enabler in the artwork and packaging services space with an integrated platform and services portfolio. Additionally, Tech Mahindra will leverage Perigord’s expertise and offerings to extend capabilities toward delivering efficiency and automation levers across sectors, including consumer- packaged goods, medical devices and over-the-counter products. The acquisition is a part of Tech Mahindra’s growth plan to expand presence in key markets in Ireland, Germany, USA, and India, with enhanced global delivery capabilities.
    [Show full text]
  • The Future of Robotics an Inside View on Innovation in Robotics
    The Future of Robotics An Inside View on Innovation in Robotics FEATURE Robots, Humans and Work Executive Summary Robotics in the Startup Ecosystem The automation of production through three industrial revolutions has increased global output exponentially. Now, with machines increasingly aware and interconnected, Industry 4.0 is upon us. Leading the charge are fleets of autonomous robots. Built by major multinationals and increasingly by innovative VC-backed companies, these robots have already become established participants in many areas of the economy, from assembly lines to farms to restaurants. Investors, founders and policymakers are all still working to conceptualize a framework for these companies and their transformative Austin Badger technology. In this report, we take a data-driven approach to emerging topics in the industry, including business models, performance metrics, Director, Frontier Tech Practice and capitalization trends. Finally, we review leading theories of how automation affects the labor market, and provide quantitative evidence for and against them. It is our view that the social implications of this industry will be massive and will require a continual examination by those driving this technology forward. The Future of Robotics 2 Table of Contents 4 14 21 The Landscape VC and Robots Robots, Humans and Work Industry 4.0 and the An Emerging Framework Robotics Ecosystem The Interplay of Automation and Labor The Future of Robotics 3 The Landscape Industry 4.0 and the Robotics Ecosystem The Future of Robotics 4 COVID-19 and US Manufacturing, Production and Nonsupervisory Workers the Next 12.8M Automation Wave 10.2M Recessions tend to reduce 9.0M employment, and some jobs don’t come back.
    [Show full text]
  • A NEW SOCIAL COMPACT for Work and Workers
    FUTURE OF WORK IN CALIFORNIA A NEW SOCIAL COMPACT for work and workers RE OF W TU OR FU K CO N M MISSIO E OF W TUR OR FU K CO N M MISSIO Commissioners Produced by Institute for the Future (IFTF) for the California Future of Members of the Future of Work Commission were appointed by Governor Work Commission, with the support Gavin Newsom to help create inclusive, long-term economic growth and ensure from The James Irvine Foundation, Californians share in that success. Blue Shield of California Foundation, the Ford Foundation and Lumina Mary Kay Henry, Co-Chair Ash Kalra Foundation. President, Service Employees State Assemblymember, California International Union District 27 James Manyika, Co-Chair Stephane Kasriel Chairman & Director, McKinsey Former CEO, Upwork Global Institute Commission Staff Fei-Fei Li Roy Bahat Professor & Co-Director, Human- Anmol Chaddha, Head, Bloomberg Beta Centered Artificial Intelligence Manager Institute, Stanford Doug Bloch Alyssa Andersen Political Director, Teamsters Joint John Marshall Julie Ericsson Council 7 Senior Capital Markets Economist, United Food and Commercial Ben Gansky Soraya Coley Workers President, California Polytechnic Georgia Gillan State University, Pomona Art Pulaski Executive Secretary-Treasurer Marina Gorbis Lloyd Dean & Chief Officer, California Labor CEO, CommonSpirit Health Jean Hagan Federation Jennifer Granholm* Lyn Jeffery Maria S. Salinas Former Governor, State of Michigan President & CEO, Los Angeles Area *Resigned from Commission Ilana Lipsett Chamber of Commerce upon nomination
    [Show full text]
  • You Zombies, Click and a Novel, 1632, Both of Which Are Available Online from Links in the Handout
    Instructor's notes to F402 Time Travel in Science Fiction Session 1 – Introduction Welcome to F402, Time Travel in Science Fiction. The objective of this course is to help you to read, understand and enjoy stories in the genre. The course is in two parts; the first is Today's lecture and discussion on the genre while the second is class discussions of two stories of opposite types. click The reading assignment consists of a short story, All You Zombies, click and a novel, 1632, both of which are available online from links in the handout. click For the convenience of those who prefer dead trees, I have listed a number of anthologies1 containing All You Zombies. Reading Assignment for Sessions 2-3 click All You Zombies is one of two tour de force stories by Robert A. Heinlein that left their mark on the genre for decades. Please read All You Zombies prior to the next session click and 1632 click click Part One, chapters 1-14 prior to the third session. Esc Session 1 Keep in mind that science fiction is a branch of literature, so the normal criteria of, e.g., characterization, consistency, continuity, plot structure, style, apply; I welcome comments, especially from those who have expertise in those areas. In addition, while a science fiction author must rely on the willing suspension of disbelief, he should do so sparingly. There is a lapse of continuity in 1632 between chapters 8 and 9; see whether you can spot it. I will suggest specific discussion points to start each discussion, but please bring up any other issues that you believe to be important or interesting.
    [Show full text]
  • Near-Death Experiences and the Theory of the Extraneuronal Hyperspace
    Near-Death Experiences and the Theory of the Extraneuronal Hyperspace Linz Audain, J.D., Ph.D., M.D. George Washington University The Mandate Corporation, Washington, DC ABSTRACT: It is possible and desirable to supplement the traditional neu rological and metaphysical explanatory models of the near-death experience (NDE) with yet a third type of explanatory model that links the neurological and the metaphysical. I set forth the rudiments of this model, the Theory of the Extraneuronal Hyperspace, with six propositions. I then use this theory to explain three of the pressing issues within NDE scholarship: the veridicality, precognition and "fear-death experience" phenomena. Many scholars who write about near-death experiences (NDEs) are of the opinion that explanatory models of the NDE can be classified into one of two types (Blackmore, 1993; Moody, 1975). One type of explana tory model is the metaphysical or supernatural one. In that model, the events that occur within the NDE, such as the presence of a tunnel, are real events that occur beyond the confines of time and space. In a sec ond type of explanatory model, the traditional model, the events that occur within the NDE are not at all real. Those events are merely the product of neurobiochemical activity that can be explained within the confines of current neurological and psychological theory, for example, as hallucination. In this article, I supplement this dichotomous view of explanatory models of the NDE by proposing yet a third type of explanatory model: the Theory of the Extraneuronal Hyperspace. This theory represents a Linz Audain, J.D., Ph.D., M.D., is a Resident in Internal Medicine at George Washington University, and Chief Executive Officer of The Mandate Corporation.
    [Show full text]
  • Back Or to the Future? Preferences of Time Travelers
    Judgment and Decision Making, Vol. 7, No. 4, July 2012, pp. 373–382 Back or to the future? Preferences of time travelers Florence Ettlin∗ Ralph Hertwig† Abstract Popular culture reflects whatever piques our imagination. Think of the myriad movies and books that take viewers and readers on an imaginary journey to the past or the future (e.g., Gladiator, The Time Machine). Despite the ubiquity of time travel as a theme in cultural expression, the factors that underlie people’s preferences concerning the direction of time travel have gone unexplored. What determines whether a person would prefer to visit the (certain) past or explore the (uncertain) future? We identified three factors that markedly affect people’s preference for (hypothetical) travel to the past or the future, respectively. Those who think of themselves as courageous, those with a more conservative worldview, and—perhaps counterintuitively—those who are advanced in age prefer to travel into the future. We discuss implications of these initial results. Keywords: time travel; preferences; age; individual differences; conservative Weltanschauung. 1 Introduction of the future. But what determines whether the cultural time machine’s lever is pushed forward to an unknown 1.1 Hypothetical time traveling: A ubiqui- future or back to a more certain past? tous yet little understood activity Little is known about the factors that determine peo- ple’s preferences with regard to the “direction” of time “I drew a breath, set my teeth, gripped the starting lever travel. Past investigations of mental time travel have typ- with both hands, and went off with a thud” (p.
    [Show full text]
  • Modelling Insight to Ball Eyes for Higher Dimensional Hyperspace Vision
    Physical Science & Biophysics Journal MEDWIN PUBLISHERS ISSN: 2641-9165 Committed to Create Value for Researchers Modelling Insight to Ball Eyes for Higher Dimensional Hyperspace Vision Shaikh S* Letter to Editor Aditya Institute of Management Studies and Research (AIMSR), India Volume 5 Issue 2 Received Date: July 16, 2021 Sadique Shaikh, Aditya Institute of Management Studies and *Corresponding author: Published Date: July 26, 2021 Research (IMSR), Jalgaon, India, Email: [email protected] DOI: 10.23880/psbj-16000183 Letter to Editor To understand this complicated conceptual idea let Quality vision even some animals, reptiles, birds and insect has good vision as compare to human eyes. To understand me begin first with the definition of VISION and then after toDIMENSIONS create animated (Figure CONSCIOUSNESS 1). The Vision inis theability help to ofacquire Brain “Dimensional-Vision” some depicts as given below. callsurrounding Observable with Life,input Planet,light, shapes, Universe places, and color Multiverse. to brain and Control to enhance, develop and shape planet earth and Equally Vision also important to grow Brain Intelligence term Dimensions as the ability of Eyes to scan surrounding at present observable Universe. Now I would like to define possibleavailable anglesVision and with geometry Left, Right, and Top,provide Bottom, data toReflection, Brain to Rotation, Transformation, Spinning and Diagonal with all universe and multiverse. For our understanding purpose create high definition Consciousness of environment, planet, understand are 3D Three-Dimensional World as X-Axis, we labeled the Dimensions which we (Human) can see and TIME and Brain create 3D consciousness using X, Y and Z Y-Axis and Z-Axis with additional fourth Dimension virtually Figure 1: has ability to see in three dimensions hence very easily can Axis’s Vision Data after input processed.
    [Show full text]
  • Teleportation
    TELEPORTATION ESSAY FOR THE COURSE QUANTUM MECHANICS FOR MATHEMATICIANS ANNE VAN WEERDEN SUPERVISOR DR B.R.U. DHERIN UTRECHT UNIVERSITY JUNE 2010 PREFACE The aim of this essay is to describe the teleportation process in such a way that it will be clear what is done so far, and what is still needed, to develop a teleportation device for humans, which would be my ultimate goal. However much is done already, there are thresholds that still have to be overcome, some of which will need real ingenuity, and others brute computing power, far more than we are now capable of. But I will show why I have confidence that we will reach this goal by describing the astonishing developments in the field of teleportation and the speed with which computing, or technology, evolves. The discovery that teleportation really is possible came about while I was in my thirties, but I was largely unaware of its further developments until I started the research for this essay. Assuming that I am not the only one who did not know, I wrote this essay aimed at people from my age, in their fifties, who, like me, started out without television and computer, I even remember my Mother telling me how she bought a transistor radio for the first time, placed it in a closet and closed the door, just to be amazed that it could still receive signals and play. We saw it all come by, from the first steps on the Moon watched on the television my parents had only bought a few years earlier, I clearly remember asking my Father who, with much foresight, got us out of our beds despite my
    [Show full text]
  • The Philosophy and Physics of Time Travel: the Possibility of Time Travel
    University of Minnesota Morris Digital Well University of Minnesota Morris Digital Well Honors Capstone Projects Student Scholarship 2017 The Philosophy and Physics of Time Travel: The Possibility of Time Travel Ramitha Rupasinghe University of Minnesota, Morris, [email protected] Follow this and additional works at: https://digitalcommons.morris.umn.edu/honors Part of the Philosophy Commons, and the Physics Commons Recommended Citation Rupasinghe, Ramitha, "The Philosophy and Physics of Time Travel: The Possibility of Time Travel" (2017). Honors Capstone Projects. 1. https://digitalcommons.morris.umn.edu/honors/1 This Paper is brought to you for free and open access by the Student Scholarship at University of Minnesota Morris Digital Well. It has been accepted for inclusion in Honors Capstone Projects by an authorized administrator of University of Minnesota Morris Digital Well. For more information, please contact [email protected]. The Philosophy and Physics of Time Travel: The possibility of time travel Ramitha Rupasinghe IS 4994H - Honors Capstone Project Defense Panel – Pieranna Garavaso, Michael Korth, James Togeas University of Minnesota, Morris Spring 2017 1. Introduction Time is mysterious. Philosophers and scientists have pondered the question of what time might be for centuries and yet till this day, we don’t know what it is. Everyone talks about time, in fact, it’s the most common noun per the Oxford Dictionary. It’s in everything from history to music to culture. Despite time’s mysterious nature there are a lot of things that we can discuss in a logical manner. Time travel on the other hand is even more mysterious.
    [Show full text]
  • The Paradox of Time Travel
    The paradox of time travel phil 20229 Jeff Speaks January 29, 2008 1 The paradox of time travel Consider the following story: \You are very depressed. You are suicidally depressed. You have a gun. But you do not quite have the courage to point the gun at yourself and kill yourself in this way. If only someone else would kill you, that would be a good thing. But you can't really ask someone to kill you. That wouldn't be fair. You decide that if you remain this depressed and you find a time machine, you will travel back in time to just about now, and kill your earlier self. That would be good. In that way you even would get rid of the depressing time you will spend between now and when you would get into that time machine. You start to muse about the coherence of this idea, when something amazing happens. Out of nowhere you suddenly see someone coming towards you with a gun pointed at you. In fact he looks very much like you, except that he is bleeding badly from his left eye, and can barely stand up straight. You are at peace. You look straight at him, calmly. He shoots. You feel a searing pain in your left eye. Your mind is in chaos, you stagger around and accidentally enter a strange looking cubicle. You drift off into unconsciousness. After a while, you can not tell how long, you drift back into consciousness and stagger out of the cubicle. You see someone in the distance looking at you calmly and fixedly.
    [Show full text]