Time Travel

Edited by Sam Baron (Australian Catholic University)
About this topic
Key works Classic works on the grandfather paradox are Lewis 1976 and Horwich 1975. Lewis's solution to the grandfather paradox is defended against Horwich 1987 by Smith 1997 and Dowe 2003. The relationship between the grandfather paradox and free will is discussed in Sider 2002 and Vihvelin 1996. A solution to Einstein's field equations that permits closed time-like curves is given in Gödel 1949. Closed time-like curves are discussed in Dowe 2007. The compatibility between dynamic theories of time and time travel is discussed in Monton 2003, Miller 2005, Miller 2006, Miller 2006, Dowe 2009 and Sider 2005.
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  1. Potentials of Future-Viewing Machines.Aaron M. Feeney - manuscript
    {June 2018 UPDATE: This work has been greatly surpassed by "Utilizing Future-Viewing Instruments" which will appear in the July 2018 issue of Progress in Physics. It can now be downloaded in PDF form from their website.} -/- The introduction of new scientific instruments has always played a vital role in the advancement of science and society. All scientific instruments to date have only been able to gain information pertaining to events of our immediate and distant past. Concerning our attempts to (...)
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  2. Decision and Foreknowledge.J. Dmitri Gallow - manuscript
    My topic is how to make decisions when you possess foreknowledge of the consequences of your choice. Many have thought that these kinds of decisions pose a distinctive and novel problem for causal decision theory (CDT). My thesis is that foreknowledge poses no new problems for CDT. Some of the purported problems are not problems. Others are problems, but they are not problems for CDT. Rather, they are problems for our theories of subjunctive supposition. Others are problems, but they are (...)
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  3. Boucles causales dans le voyage dans le temps.Nicolae Sfetcu - manuscript
    À propos de la possibilité de voyager dans le temps sur la base de plusieurs ouvrages spécialisés, notamment ceux de Nicholas J. J. Smith (« Time Travel »), William Grey (« Troubles with Time Travel »), Ulrich Meyer (« Explaining causal loops »), Simon Keller and Michael Nelson (« Presentists should believe in time-travel »), Frank Arntzenius and Tim Maudlin (« Time Travel and Modern Physics »), et David Lewis (« The Paradoxes of Time Travel »). L'article commence par une (...)
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  4. Voyage dans le temps.Nicolae Sfetcu - manuscript
    Une autre définition du voyage dans le temps (Arntzenius 2006) (Smeenk and Wüthrich 2011) l'assimile à l'existence des courbes temporelles fermées, une variété lorentzienne d'une particule matérielle dans l'espace-temps qui revient à son point de départ. Certains auteurs acceptent l’existence de deux dimensions temporelles et d’autres envisagent des scénarios comportant plusieurs univers « parallèles », chacun ayant son propre espace-temps à quatre dimensions.Mais la question est de savoir si un voyage dans une autre dimension temporelle ou dans un autre univers (...)
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  5. La causalité dans le voyage dans le temps.Nicolae Sfetcu - manuscript
    Certains scientifiques et philosophes sont d’avis que toute théorie permettant un voyage dans le temps introduirait des problèmes de causalité. Ces types de paradoxes temporels peuvent être évités grâce au principe de cohérence de Novikov ou à une variation de l'interprétation des mondes multiples avec des mondes en interaction. L'argument classique contre la causalité rétrograde est l'argument du contournement. La causalité implique un avenir ontologiquement fermé - une position métaphysique sur le temps communément appelée l'éternalisme, une forme spécifique de non-présentisme. (...)
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  6. Buclele cauzale în călătoria în timp.Nicolae Sfetcu - manuscript
    În această lucrare analizez posibilitatea călătoriei în timp pe baza mai multor lucrări de specialitate, printre care cele ale lui Nicholas J.J. Smith ("Time Travel", The Stanford Encyclopedia of Philosophy”), William Grey (”Troubles with Time Travel”), Ulrich Meyer (”Explaining causal loops”), Simon Keller și Michael Nelson (”Presentists should believe in time-travel”), Frank Arntzenius și Tim Maudlin ("Time Travel and Modern Physics") și David Lewis (“The Paradoxes of Time Travel”). Lucrarea începe cu o Introducere în care fac o scurtă prezentare a (...)
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  7. La philosophie du voyage dans le temps.Nicolae Sfetcu - manuscript
    L'éternalisme soutient que le passé et le futur existent réellement, en partant de l’idée que le temps est une dimension similaire aux dimensions spatiales, que les événements passés et futurs sont « présents » sur l’axe du temps, mais cette opinion est contestée. Dans la vision à quatre dimensions, l'univers est une topologie espace-temps existante, contenant tout ce qui s'est passé, tout ce qui se passe et tout ce qui va se passer. Il en résulte qu'il n'y a aucun moment (...)
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  8. Causal Loops in Time Travel.Nicolae Sfetcu - manuscript
    About the possibility of time traveling based on several specialized works, including those of Nicholas J. J. Smith ("Time Travel"), William Grey (”Troubles with Time Travel”), Ulrich Meyer (”Explaining causal loops”), Simon Keller and Michael Nelson (”Presentists should believe in time-travel”), Frank Arntzenius and Tim Maudlin ("Time Travel and Modern Physics"), and David Lewis (“The Paradoxes of Time Travel”). The article begins with an Introduction in which I make a short presentation of the time travel, and continues with a History (...)
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  9. Paradoxuri cauzale în călătoria în timp.Nicolae Sfetcu - manuscript
    Orice teorie care ar permite călătoria în timp ar introduce probleme de cauzalitate. Aceste tipuri de paradoxuri temporale pot fi evitate prin principiul de consecvență Novikov sau printr-o variație a interpretării multor lumi cu lumi care interacționează. Argumentul clasic împotriva cauzalității înapoi este argumentul bilking, Dacă un eveniment A provoacă un eveniment anterior B, bilking recomandă o încercare de a decorela A și B, adică de a aduce A în cazurile în care B nu a avut loc și de a (...)
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  10. Călătoria în timp.Nicolae Sfetcu - manuscript
    Călătoria în timp implică deplasarea într-un timp diferit de cel prezent, în trecut sau în viitor, în principiu fără o deplasare în spațiu cu referire la un sistem de coordonate local. Călătoria în timp poate fi făcută de un corp material care poate fi sau nu o ființă vie, și pentru care se folosește de obicei un dispozitiv special denumit mașina timpului. Călătoria în timp este un concept recunoscut în filosofie și știință, dar a cărui posibilitatea este foarte disputată, dând (...)
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  11. Paradoxe du grand-père.Nicolae Sfetcu - manuscript
    L'exemple le plus connu de l'impossibilité de voyager dans le temps est le paradoxe du grand-père ou l'argument de l'auto-infanticide: une personne qui voyage dans le passé et tue son propre grand-père, empêchant ainsi l'existence d'un de ses parents et donc sa propre existence. Une réponse philosophique à ce paradoxe serait l'impossibilité de changer le passé, (à l'instar du principe de cohérence de Novikov. Le paradoxe du grand-père implique toute action qui change le passé. Il se présente sous de nombreuses (...)
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  12. Space, Time, and Time Travel.Nicolae Sfetcu - manuscript
    Newton supported the idea of absolute time, unlike Leibniz, for which time is only a relation between events and cannot be expressed independently, a statement in concordance with the relativity of space-time. Eternalism claims that the past and the future exist in a real sense, going to the idea that time is a dimension similar to spatial dimensions, that future and past events are "present" on the axis of time, but this view is challenged. On four-dimensional vision, the universe is (...)
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  13. Filosofia călătoriei în timp – Paradoxul bunicului.Nicolae Sfetcu - manuscript
    Newton a susținut ideea timpului absolut, spre deosebire de Leibniz pentru care timpul este doar o relație între evenimente și nu poate fi exprimat în mod independent, afirmație în concordanță ci relativitatea spațiu-timpului. Eternismul susține că trecutul și viitorul există într-un sens real, mergându-se până la ideea că timpul este o dimensiune similară cu dimensiunile spațiale, că evenimentele viitoare și trecute sunt "prezente" pe axa timpului, dar această opinie este contestată. Cel mai cunoscut exemplu de imposibilitate a călătoriei în timp (...)
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  14. Time Travel.Nicolae Sfetcu - manuscript
    Time travel is a recognized concept in philosophy and science, but whose scope is highly disputed, giving rise to numerous paradoxes in both philosophy and science. Time travel is considered by some accepted both in general relativity and quantum mechanics, but there is a unanimous consensus that it is not feasible with current technology. (Hawkins 2010) The raised issues are different for the time travel in the past compared to the time travel in the future.
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  15. Grandfather Paradox in Time Travel.Nicolae Sfetcu - manuscript
    The most well-known example of the impossibility of traveling in time is the grandfather paradox or self-infanticide argument: a person who travels in the past and kills his own grandfather, thus preventing the existence of one of his parents and thus his own existence. A philosophical response to this paradox would be the impossibility of changing the past, like Novikov self-consistency principle (if an event exists that would cause a paradox or any "change" to the past whatsoever, then the probability (...)
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  16. Back to the Future: Curing Past Sufferings and S-Risks Via Indexical Uncertainty.Alexey Turchin - manuscript
    The long unbearable sufferings in the past and agonies experienced in some future timelines in which a malevolent AI could torture people for some idiosyncratic reasons (s-risks) is a significant moral problem. Such events either already happened or will happen in causally disconnected regions of the multiverse and thus it seems unlikely that we can do anything about it. However, at least one pure theoretic way to cure past sufferings exists. If we assume that there is no stable substrate of (...)
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  17. The Apparent Nature of Relative Simultaneity.Andrew Wutke - manuscript
    This paper presents the proof of the apparent nature of relative simultaneity originally derived from Einstein’s Special Theory of Relativity (STR). The proof does not challenge the validity of the STR but uncovers fundamental and widespread error in understanding of practical implications of Lorentz transformations. It is demonstrated that more than a century long debates generally miss the point. This results in counterintuitive claims of coexisting multiple time realities by mere equivalence of equal clock indications and simultaneity. Such claims have (...)
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  18. Self Visitation, Traveler Time and Non-Contradiction.John Carroll - manuscript
    The self-visitation paradox is one paradox of time travel. As Ted Sider puts it, “Suppose I travel back in time and stand in a room with my sitting 10-year-old self. I seem to be both sitting and standing, but how can that be?” (2001, 101). So as not to beg any questions, let us label what is sitting B and what is standing C. The worry is about how B can be C in light of the looming contradiction that this (...)
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  19. Context, Conditionals, Fatalism, Freedom & Time Travel.John Carroll - manuscript
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  20. A Trip Back in Time and Space.George Johnson - manuscript
    Science Times cover story, July 10, 2007.
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  21. Paradoxes of Time Travel to the Future.Sara Bernstein - forthcoming - In Helen Beebee & Anthony Fisher (eds.), Perspectives on the Philosophy of David K. Lewis. Oxford, UK: Oxford University Press.
    This paper brings two fresh perspectives on Lewis’s theory of time travel. First: many key aspects and theoretical desiderata of Lewis’s theory can be captured in a framework that does not commit to eternalism about time. Second: implementing aspects of Lewisian time travel in a non-eternalist framework provides theoretical resources for a better treatment of time travel to the future. While time travel to the past has been extensively analyzed, time travel to the future has been comparatively underexplored. I make (...)
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  22. How Stable Is Objective Chance?John Cusbert - forthcoming - British Journal for the Philosophy of Science:axy069.
    This paper examines the stability of objective chance. I defend the stable chance thesis : that in any given possible world, any pair of intrinsic duplicate physical setups with the same chances of being subject to the same external influences must yield the same chances. I argue that SCT compares favourably to rivals in the literature. I then consider a challenge to SCT involving time travel and causal loops. I argue that SCT survives this challenge, but that such cases expose (...)
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  23. Philosophy of Time A Contemporary Introduction.Sean Enda Power - forthcoming - Routledge.
    As a growing area of research, the philosophy of time is increasingly relevant to different areas of philosophy and even other disciplines. This book describes and evaluates the most important debates in philosophy of time, under several subject areas: metaphysics, epistemology, physics, philosophy of language, philosophy of mind, cognitive science, rationality, and art. -/- Questions this book investigates include: Can we know what time really is? Is time possible, especially given modern physics? Must there be time because we cannot think (...)
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  24. No Crystal Balls.Jack Spencer - forthcoming - Noûs.
    The world is said to contain crystal balls whenever the present carries news of the as-yet-undetermined parts of the future. Many philosophers believe that crystal balls are metaphysically possible. In this essay, I argue that they are not. Whether crystal balls are possible matters, for at least two reasons. The first is epistemological. According to a simple, user-friendly chance norm for credence, which I call the Present Principle, agents are rationally required to conform their credences to their expectations of the (...)
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  25. Time Travel and Coincidence-Free Local Dynamical Theories.Giuliano Torrengo - forthcoming - Synthese (11):4835-4846.
    I criticize Lockwood’s solution to the “paradoxes” of time travel, thus endorsing Lewis’s more conservative position. Lockwood argues that only in the context of a 5D space-time-actuality manifold is the possibility of time travel compatible with the Autonomy Principle. I argue that shifting from 4D space-time to 5D space-time-actuality does not change the situation with respect to the Autonomy Principle, since the shift does not allow us to have a coincidence-free local dynamical theory.
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  26. Back to the (Branching) Future.Giacomo Andreoletti - 2020 - Acta Analytica 35 (2):181-194.
    The future is different from the past. What is past is fixed and set in stone. The future, on the other hand, is open insofar as it holds numerous possibilities. Branching-tree models of time account for this asymmetry by positing an ontological difference between the past and the future. Given a time t, a unique unified past lies behind t, whereas multiple alternative existing futures lie ahead of t. My goal in this paper is to show that there is an (...)
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  27. A physical interpretation of Lewis’ discrepancy between personal and external time in time travels.Vincenzo Fano & Giovanni Macchia - 2020 - Synthese 197 (11):4847-4866.
    This paper deals with those time travels mostly considered by physics, namely those in the form of the so-called closed timelike curves. Some authoritative scholars have raised doubts about the status of these journeys as proper time travels. By using David Lewis’ famous definition of time travels proposed in 1976, we show that this proper status may actually be recovered, at least in some cosmological contexts containing spacetime regions, such as those concerning black holes described by the Kerr–Newman metric, that (...)
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  28. Freedom, self-prediction, and the possibility of time travel.Alison Fernandes - 2020 - Philosophical Studies 177 (1):89-108.
    Do time travellers retain their normal freedom and abilities when they travel back in time? Lewis, Horwich and Sider argue that they do. Time-travelling Tim can kill his young grandfather, his younger self, or whomever else he pleases—and so, it seems can reasonably deliberate about whether to do these things. He might not succeed. But he is still just as free as a non-time traveller. I’ll disagree. The freedom of time travellers is limited by a rational constraint. Tim can’t reasonably (...)
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  29. Time Travel and the Immutability of the Past Within B-Theoretical Models.Giacomo Andreoletti & Giuliano Torrengo - 2019 - Philosophia 47 (4):1011-1021.
    The goal of this paper is to defend the general tenet that time travelers cannot change the past within B-theoretical models of time, independently of how many temporal dimensions there are. Baron Pacific Philosophical Quarterly, 98, 129–147 offered a strong argument intended to reach this general conclusion. However, his argument does not cover a peculiar case, i.e. a B-theoretical one-dimensional model of time that allows for the presence of internal times. Loss Pacific Philosophical Quarterly, 96, 1–11 used the latter model (...)
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  30. The End of Mystery.Sam Baron & Mark Colyvan - 2019 - American Philosophical Quarterly 56 (3):247-264.
    Tim travels back in time and tries to kill his grandfather before his father was born. Tim fails. But why? Lewis's response was to cite "coincidences": Tim is the unlucky subject of gun jammings, banana peels, sudden changes of heart, and so on. A number of challenges have been raised against Lewis's response. The latest of these focuses on explanation. This paper diagnoses the source of this new disgruntlement and offers an alternative explanation for Tim's failure, one that Lewis would (...)
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  31. Would the Existence of CTCs Allow for Nonlocal Signaling?Lucas Dunlap - 2019 - Erkenntnis 84 (1):215-234.
    A recent paper from Brun et al. has argued that access to a closed timelike curve would allow for the possibility of perfectly distinguishing nonorthogonal quantum states. This result can be used to develop a protocol for instantaneous nonlocal signaling. Several commenters have argued that nonlocal signaling must fail in this and in similar cases, often citing consistency with relativity as the justification. I argue that this objection fails to rule out nonlocal signaling in the presence of a CTC. I (...)
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  32. Time Travel and Counterfactual Asymmetry.Alison Fernandes - 2019 - Synthese 198 (3):1983-2001.
    We standardly evaluate counterfactuals and abilities in temporally asymmetric terms—by keeping the past fixed and holding the future open. Only future events depend counterfactually on what happens now. Past events do not. Conversely, past events are relevant to what abilities one has now in a way that future events are not. Lewis, Sider and others continue to evaluate counterfactuals and abilities in temporally asymmetric terms, even in cases of backwards time travel. I’ll argue that we need more temporally neutral methods. (...)
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  33. Multilocation Without Time Travel.Justin Mooney - 2019 - Erkenntnis:1-14.
    Some philosophers defend the possibility of synchronic multilocation, and have even used it to defend other substantive metaphysical theses. But just how strong is the case for the possibility of synchronic multilocation? The answer to this question depends in part on whether synchronic multilocation is wedded to other controversial metaphysical notions. In this paper, I consider whether the possibility of synchronic multilocation depends on the possibility of time travel, and I conclude that the answer hinges on the nature of time (...)
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  34. Review of Paradoxes of Time Travel. [REVIEW]Giacomo Andreoletti - 2018 - Argumenta 6:381-384.
    Book review of Wasserman, R. (2017), Paradoxes of Time Travel, OUP.
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  35. An Introduction to the Philosophy of Time.Sam Baron & Kristie Miller - 2018 - Cambridge: Polity Press.
    Time is woven into the fabric of our lives. Everything we do, we do in and across time. It is not just that our lives are stretched out in time, from the moment of birth to the moment of our death. It is that our lives are stories. We make sense of ourselves, today, by understanding who we were yesterday, and the day before, and the day before that; by understanding what we did and why we did it. Our memories (...)
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  36. Philosophie du temps.Jiri Benovsky (ed.) - 2018 - La Baconnière.
    Comment les objets matériels persistent-ils à travers le temps ? Qu'est-ce que cela veut dire qu'un objet change tout en étant un et le même ? Peut-il y avoir un monde sans temps ? Le temps s'écoule-t-il même si rien ne change ? Et, le temps lui-même, qu'est-ce que c'est ? Consiste-t-il seulement en l'instant présent, ou le passé et le futur existent-ils également ? Est-il possible de voyager dans le temps ? Quelles propriétés le temps doit-il avoir pour permettre (...)
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  37. Filosofia del Futuro.Samuele Iaquinto & Giuliano Torrengo - 2018 - Milano: Raffaello Cortina.
    Scopo del volume è offrire un’introduzione accessibile e rigorosa ai più recenti sviluppi di una fondamentale branca della filosofia del tempo: la filosofia del futuro. Vengono presentate e discusse alcune delle domande chiave del dibattito contemporaneo, ad esempio: il futuro è già scritto o esistono molti cammini alternativi che il tempo è in grado di imboccare? "Esistere" significa semplicemente essere presenti o ci sono veri e propri oggetti futuri? Siamo davvero liberi di scegliere quali azioni compiere e di modificare il (...)
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  38. If Time Travel to Our Location is Possible, We Do Not Live in a Branching Universe.James Norton - 2018 - Analysis 78 (2):260-266.
    This paper argues for the following disjunction: either we do not live in a world with a branching temporal structure, or backwards time travel is nomologically impossible, given the initial state of the universe, or backwards time travel to our space-time location is impossible given large-scale facts about space and time. A fortiori, if backwards time travel to our location is possible, we do not live in a branching universe.
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  39. Călătorii în timp.Nicolae Sfetcu - 2018 - Drobeta Turnu Severin: MultiMedia Publishing.
    Există teorii recente, inclusiv despre găurile de vierme, care permit călătoriile în timp. În cazul găurii de vierme. aceasta ar fi posibil accelerând unul din capetele găurii de vierme la o viteză mult mai mare decât celălalt capăt şi aducându-le, la un moment ulterior, în starea iniţială. Ar rezulta de aici o dilatare relativistă a timpului la capătul accelerat al găurii de vierme, timpul scurgându-se aici mai încet decât la celălalt capăt staţionar din punctul de vedere al unui observator extern, (...)
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  40. Back to the Unchanging Past.Sam Baron - 2017 - Pacific Philosophical Quarterly 98 (1):129-147.
    The standard philosophical view of time travel has it that time travelers cannot change the past. It has been argued by some that the standard view is false, and that this can be shown using a two-dimensional model of time. I defend the standard view against this attack. I show, first, that the addition of a second temporal dimension does not provide a model of changing the past and, second, that neither does the addition of n temporal dimensions for any (...)
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  41. Time Travel and the Movable Present.Sara Bernstein - 2017 - In John Keller (ed.), Being, Freedom, and Method: Themes from the Philosophy of Peter van Inwagen. pp. 80-94.
    In "Changing the Past" (2010), Peter van Inwagen argues that a time traveler can change the past without paradox in a growing block universe. After erasing the portion of past existence that generates paradox, a new, non-paradox-generating block can be "grown" after the temporal relocation of the time traveler. -/- I articulate and explore the underlying mechanism of Van Inwagen's model: the time traveler's control over the location of the objective present. Van Inwagen's model is aimed at preventing paradox by (...)
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  42. Time Travel, Double Occupancy, and The Cheshire Cat.John W. Carroll, Daniel Ellis & Brandon Moore - 2017 - Philosophia 45 (2):541-549.
    The possibility of continuous backwards time travel—time travel for which the traveler follows a continuous path through space between departure and arrival—gives rise to the double-occupancy problem. The trouble is that the time traveler seems bound to have to travel through his or her younger self as the trip begins. Dowe and Le Poidevin agree that this problem is solved by putting the traveler in motion for a gradual trip to the past. Le Poidevin goes on to argue, however, that (...)
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  43. Mental Time Travel, Dynamic Evaluation, and Moral Agency.Philip Gerrans & Jeanette Kennett - 2017 - Mind 126 (501):259-268.
    Mental time travel is the ability to simulate alternative pasts and futures. It is often described as the ability to project a sense of self in the service of diachronic agency. It requires not only semantic representation but affective sampling of alternative futures. If people lose this ability for affective sampling their sense of self is diminished. They have less of a self to project hence are compromised as agents. If they cannot “feel the future” they cannot imaginatively inhabit it (...)
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  44. Being, Freedom, and Method: Themes From the Philosophy of Peter van Inwagen.John A. Keller (ed.) - 2017 - Oxford University Press UK.
    John Keller presents a set of new essays on ontology, time, freedom, God, and philosophical method. Our understanding of these subjects has been greatly advanced, since the 1970s, by the work of Peter van Inwagen. The contributions, from some of the most prominent living philosophers, engage with van Inwagen's work and offer new insights in metaphysics, philosophy of religion, and the philosophy of philosophy. Van Inwagen himself gives selective responses. In metaphysics, the volume will particularly interest philosophers working on free (...)
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  45. Avoiding Paradoxes in Multiverse Time Travel Narratives.Morgan Luck - 2017 - Science Fiction 2 (1).
    The aim of this paper is to help authors 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.
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  46. A Blast From The Past.Kristie Miller - 2017 - The Philosophers' Magazine 77:82-86.
    That we find the idea of travelling in time, and in particular travelling backwards in time, fascinating, is evidenced by the plethora of new science fictions shows depicting time travel that hit our TV screens in 2016. I love time travel shows, and I can hardly keep up. In almost all cases these shows depict what philosophers call inconsistent time travel stories: stories that commit what my colleague Nick Smith (The University of Sydney) calls the second time around fallacy. These (...)
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  47. Is Some Backwards Time Travel Inexplicable?Kristie Miller - 2017 - American Philosophical Quarterly 54 (2):131-141.
    It has been suggested that there is something worrisome, puzzling, or incomprehensible about the sorts of causal loops sometimes involved in backwards time travel. This paper disentangles two distinct puzzles and evaluates whether they provide us reason to find backwards time travel incomprehensible, inexplicable, or otherwise worrisome. The paper argues that they provide no such reason.
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  48. I’D Do Anything to Change the Past (But I Can’T Do ‘That').Nicholas J. J. Smith - 2017 - American Philosophical Quarterly 54 (2):153-168.
    This paper addresses a worry about backwards time travel. The worry is that there is something mysteriously inexplicable about the combination of commonplace events that will inevitably conspire to prevent the time traveler from doing something impossible such as killing her younger self. The worry is first distinguished from other problems for backwards time travel concerning its alleged impossibility or improbability. It is then shown that the worry is misplaced: there is in fact no real problem here. Yet the worry (...)
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  49. Time Enough for Explanation.Sam Baron & Mark Colyvan - 2016 - Journal of Philosophy 113 (2):61-88.
    The present paper advances an analogy between cases of extra-mathematical explanation and cases of what might be termed ‘extra-logical explanation’: the explanation of a physical fact by a logical fact. A particular case of extra-logical explanation is identified that arises in the philosophical literature on time travel. This instance of extra-logical explanation is subsequently shown to be of a piece with cases of extra-mathematical explanation. Using this analogy, we argue extra-mathematical explanation is part of a broader class of non-causal explanation. (...)
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  50. Travel Intention: Relative Value of Transport Alternatives.Inge Brechan - 2016 - Human Affairs 26 (4).
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