Note on the text of the principles -- Context -- Biography -- Berkeley's philosophical background -- Overview of themes -- Teading the text -- The principles : introduction -- The principles : part one -- The objects and subject of knowledge : ideas and spirit -- Unperceived existence : a nicer strain of abstraction -- Problems for materialism -- A Cartesian dream argument -- The master argument -- From the inertness of ideas to the existence of God -- Philosophical objections (...) to immaterialism and replies -- Religious objections to immaterialism and replies -- Further advantages of immaterialism -- Great provinces of speculative science -- The attack on absolute space -- Mathematics -- Other minds -- The divine language of nature -- Reception and influence -- Guide to further reading. (shrink)

Might time be multi‐dimensional? In exploring this question, this paper uses a thought‐experiment about dimensionality, H. G. Wells' ‘The Plattner Story’. Plattner has his left and right sides transposed after a trip through a fourth spatial dimension, a change with independent empirical consequences. This example is then generalised to reversals of the directions of time and entropy. Finally, this thought‐experiment is related to relativistic theories of time and the possibility of preserving causality in a temporally multi‐dimensional framework.

Alasdair Richmond introduces some famous paradoxes about time travel.

Following on from Nick Bostrom's discussion of the Doomsday argument, Alasdair Richmond considers how anthropic reasoning can lead from Doomsday to some odd conclusions about computation and our place in reality.

H. G. Wells’ Time Traveller inhabits uniform Newtonian time. Where relativistic/quantum travelers into the past follow spacetime curvatures, past-bound Wellsians must reverse their direction of travel relative to absolute time. William Grey and Robin Le Poidevin claim reversing Wellsians must overlap with themselves or fade away piecemeal like the Cheshire Cat. Self-overlap is physically impossible but ‘Cheshire Cat’ fades destroy Wellsians’ causal continuity and breed bizarre fusions of traveler-stages with opposed time-directions. However, Wellsians who rotate in higher-dimensional space can reverse (...) temporal direction without self-overlap, Cheshire Cats or mereological monstrosities. Alas, hyper-rotation in Newtonian space poses dynamic and biological problems,. Controllable and survivable Wellsian travel needs topologically-variable spaces. Newtonian space, not Newtonian time, is Wellsians’ real enemy. (shrink)

This paper looks at Kurt Gödel's causally‐pathological cosmological models (derived from general relativity), in the light of anthropic explanations. If a Gödelian world is a possible world, could anthropic reasoning shed any light on whether or not our world is Gödelian? This paper argues that while there are some good anthropic reasons why our world ought to be Gödelian, too many observations suggest that our world can’t possibly be Gödelian in fact. If Gödel's world is a possible one, anthropic teleology (...) alone cannot explain why it isn’t the world we inhabit. Furthermore, if our world were Gödelian, anthropic arguments against the existence of extraterrestrial intelligences would imply a bleak human future. En route, some general objections to relativistic causal pathologies are addressed and some anthropic arguments to the effect that Gödelian worlds couldn’t sustain life are also addressed and dismissed. (shrink)

Being alive throughout all history need not save you from dying, even if history extends infinitely into the past and future. Infinitely-long lives can fall short of genuine immortality and suffer all an ordinary mortal’s diminution in experience. Adapting David Lewis on time travel, Roy Sorensen imagines quasi-immortal ‘spore gods’, whose finite personal lives are distributed across infinite external time. While criticising the ‘Eleatic’ terms in which Sorensen presents spore gods, this paper argues his essential claims are correct: ‘spore god’ (...) worlds are logically and metaphysically possible. Indeed, going beyond Sorensen, spore gods are even nomologically accessible within General Relativity. (shrink)

In 1987, Roy Sorensen coined the term 'parahistory' to denote the study of genuinely anachronistic artefacts delivered by time travel.¹ 'Parahistory' would thus stand to history rather as parapsychology is claimed to stand to psychology, i.e. the parahistorian would study historical data that were obtained through channels that orthodox science does not recognise. How might one establish credentials as a time traveller? What sort of evidence could a time-traveller point to in support of claims that would presumably command a great (...) deal of scepticism? While successful predictions might be one confirmatory tool, supporting evidence needn't take the form of predictions. (Although Sorensen offers an intriguing argument that a Humean about miracle-testimony would be obliged to reject any testimony to the occurrence of time travel.) Perhaps artefacts that time travellers retrieve from other times (past or future) could usefully supplement testimonial or predictive evidence for the parahistorian. However, this paper will argue, any appeal to past-artefactual evidence for parahistorical claims faces a dilemma that threatens to undermine its value: appeals to past-artefact evidence must either collapse into appeals to predictive evidence or see their value diminished by such past artefacts' necessarily exhibiting contradictory indicators of age and period. (shrink)

Around 1998, internet postings began appearing under the alias ‘ Timetravel_0 ’. This alias was later replaced by ‘John Titor’, and it's as such I'll designate the posts' author. Remarkably, Titor claimed to have time-travelled from 2036 on a mission to retrieve an IBM 5100 in 1975. Titor refrained from public appearances and any evidence for his story remains web-bound but before closing shop c. March 24 th 2001, he described various future events, e.g.: Y2K is a disaster. Many people (...) die on the highways when they freeze to death trying to get to warmer weather. Cancellation of the Olympics after 2004 due to world conflict. America will soon be engaged in civil war with itself; a civil war that we'll see the beginnings of during 2004 and 2005, escalating until it is indisputable by 2008. This equivocal civil war fizzles until global nuclear war kills three billion people in 2015. (shrink)

Combining time travel with certain kinds of supertask, this paper proposes a novel model for Hell. Temporally-closed spacetimes allow otherwise impossible opportunities for material kinds of damnation and reveal surprising limitations on metaphysical objections to Hell. Prima facie, eternal damnation requires either infinite amounts of time or time for the damned to speed-up arbitrarily. However, spatiotemporally finite ‘time travel’ universes can host unending personal torment for infinitely many physical beings, while keeping fixed finite limits on rates of temporal passage. Such (...) ‘Hilbert's Inferno’ spacetimes suggest neither materialism nor the finitude of time and space need forbid Hell. A material Hell can be spatiotemporally finite yet eternal for its inhabitants. Hilbert's Inferno also sheds light on Hell's location and accessibility, and shows that some spacetimes are intrinsically better suited to punishment than reward. (shrink)

In 1987, Roy Sorensen coined the term “parahistory” to denote the hypothetical study of evidence retrieved via time travel. Parahistory would thus stand to history rather as parapsychology does to psychology; studying data (in this case artefacts) that are obtained in ways unrecognised by orthodox science. This paper considers future-derived parahistorical artefacts. Past/future asymmetries threaten irresolvable problems in calibrating future objects' periods, in dating future artefacts and insulating them from causal loops. In turn, causal loop objects at best cannot be (...) non-arbitrarily dated at all and at worst, cannot even be artefacts. Even if there can be evidence for travel from the future, any such evidence that appeals to future artefacts faces pervasive difficulties and is very unlikely to be compelling. (shrink)

In 1987, Roy Sorensen coined the term “parahistory” to denote the hypothetical study of evidence retrieved via time travel. Parahistory would thus stand to history rather as parapsychology does to psychology; studying data (in this case artefacts) that are obtained in ways unrecognised by orthodox science. This paper considers future-derived parahistorical artefacts. Past/future asymmetries threaten irresolvable problems in calibrating future objects' periods, in dating future artefacts and insulating them from causal loops. In turn, causal loop objects at best cannot be (...) non-arbitrarily dated at all and at worst, cannot even be artefacts. Even if there can be evidence for travel from the future, any such evidence that appeals to future artefacts faces pervasive difficulties and is very unlikely to be compelling. (shrink)

This paper attempts three tasks in relation to Carter and Leslie's Doomsday Argument. First, it criticises Timothy Chambers' 'Ussherian Corollary', a striking but unsuccessful objection to standard Doomsday arguments. Second, it reformulates the Ussherian Corollary as an objection to Bradley Monton's variant Doomsday and Nick Bostrom's Simulation Argument. Finally, it tries to diagnose the epistemic/metaphysical problems facing Doomsday-related arguments.1.

The philosophy of time travel has an illustrious pedigree, having seen ground-breaking physical and philosophical treatments in the late 1940s and early 1950s from Kurt Gödel [...].

_ Paradoxes of Time Travel _ By WassermanRyanOxford University Press, 2018. x + 250 pp.

Time Travel: Probability and Impossibility By EffinghamNikkOxford University Press, 2020. 256 pp.

Inspired by anthropic reasoning behind Doomsday arguments, Nick Bostrom's Simulation Argument says: people who think advanced civilisations would run many fully-conscious simulated minds should also think they're probably simulated minds themselves. However, Bostrom's conclusions can be resisted, especially by sympathisers with Doomsday or anthropic reasoning. This paper initially offers a posterior-probabilistic ‘Doomsday lottery’ argument against Bostrom's conclusions. Suggestions are then offered for deriving anti-simulation conclusions using weaker assumptions. Anti-simulation arguments herein use more robust reference classes than Bostrom's argument, require no (...) Principles of Indifference, abide better by the total evidence requirement, and yet use empirically plausible priors and likelihoods. However, while Doomsday arguments are probabilistically, epistemically and metaphysically stronger than the Simulation Argument, anthropic reasoning can refrain from embracing either. (shrink)

Philosophy for Everyone begins by explaining what philosophy is before exploring the questions and issues at the foundation of this important subject.Key topics and their areas of focus include:Epistemology - what our knowledge of the world and ourselves consists in, and how we come to have it;Philosophy of Science - foundational conceptual issues in scientific research and practice;Philosophy of Mind - what it means for something to have a mind, and how minds should be understood and explained;Moral Philosophy - the (...) nature of our moral judgements and reactions, whether they aim at some objective moral truth, or are mere personal or cultural preferences, and;Metaphysics - fundamental conceptual questions about the nature of reality.Designed to be used on the corresponding Introduction to Philosophy online course offered by The University of Edinburgh, this book is also highly recommended to anyone looking for a short overview of this fascinating discipline. (shrink)

Philosophy for Everyone begins by explaining what philosophy is before exploring the questions and issues at the foundation of this important subject. Key topics in this new edition and their areas of focus include: Moral philosophy – the nature of our moral judgments and reactions, whether they aim at some objective moral truth, or are mere personal or cultural preferences; and the possibility of moral responsibility given the sorts of things that cause behavior; Political philosophy – fundamental questions about the (...) nature of states and their relationship to the citizens within those states Epistemology – what our knowledge of the world and ourselves consists in, and how we come to have it; and whether we should form beliefs by trusting what other people tell us; Philosophy of mind – what it means for something to have a mind, and how minds should be understood and explained; Philosophy of science – foundational conceptual issues in scientific research and practice, such as whether scientific theories are true; and Metaphysics - fundamental questions about the nature of reality, such as whether we have free will, or whether time travel is possible. This book is designed to be used in conjunction with the free ‘Introduction to Philosophy’ MOOC created by the University of Edinburgh’s _Eidyn_ research centre, and hosted by the Coursera platform.This book is also highly recommended for anyone looking for a short overview of this fascinating discipline. (shrink)

This classic and controversial book examines the roots of the idea of virtue, diagnoses the reasons for its absence in modern life, and proposes a path for its recovery.

Alasdair MacIntyre explores some central philosophical, political and moral claims of modernity and argues that a proper understanding of human goods requires a rejection of these claims. In a wide-ranging discussion, he considers how normative and evaluative judgments are to be understood, how desire and practical reasoning are to be characterized, what it is to have adequate self-knowledge, and what part narrative plays in our understanding of human lives. He asks, further, what it would be to understand the modern (...) condition from a neo-Aristotelian or Thomistic perspective, and argues that Thomistic Aristotelianism, informed by Marx's insights, provides us with resources for constructing a contemporary politics and ethics which both enable and require us to act against modernity from within modernity. This rich and important book builds on and advances MacIntyre's thinking in ethics and moral philosophy, and will be of great interest to readers in both fields. (shrink)

This is the text of The Lindley Lecture for 1984, given by Alasdair Maclntyre, a Scottish philosopher.

Humans are moral creatures. Among all life on Earth, we alone experience rich moral emotions, follow complex rules governing how we treat one another, and engage in moral dialogue. But how did human morality evolve? And can humans become morally evolved? -/- In A Better Ape, Victor Kumar and Richmond Campbell draw on the latest research in the biological and social sciences to explain the key role that morality has played in human evolution. They explore the moral traits that (...) humans share with chimpanzees; how a more complex moral mind enabled Homo sapiens to arise and out-compete other human species; and the place of morality alongside historic revolutions in technology and social organization. Throughout the book, Kumar and Campbell argue that morality co-evolved with intelligence and complex sociality. Morality prevents societal collapse and enables complex knowledge. -/- After unearthing the ancient origins of human morality, Kumar and Campbell use evolutionary theory to deliver profound insights about how to advance moral progress and resist moral regress, such as reducing animal suffering on industrial farms; capitalizing on the recent revolution in gay rights to foster a nascent revolution in transgender rights; opposing intersectional inequality that impacts women and people of color in lower socioeconomic classes; and addressing major problems of global inequality, especially impending crises of injustice caused by anthropogenic climate change. Understanding how we evolved--and how we continue to evolve--can help us become a better ape. (shrink)

Introduction : animals and political theory -- Animals in the history of political thought -- Utilitarianism and animals -- Liberalism and animals -- Communitarianism and animals -- Marxism and animals -- Feminism and animals.

Alasdair Cochrane introduces an entirely new theory of animal rights grounded in their interests as sentient beings. He then applies this theory to different and underexplored policy areas, such as genetic engineering, pet-keeping, indigenous hunting, and religious slaughter. In contrast to other proponents of animal rights, Cochrane claims that because most sentient animals are not autonomous agents, they have no intrinsic interest in liberty. As such, he argues that our obligations to animals lie in ending practices that cause their (...) suffering and death and do not require the liberation of animals. Cochrane's "interest-based rights approach" weighs the interests of animals to determine which is sufficient to impose strict duties on humans. In so doing, Cochrane acknowledges that sentient animals have a clear and discernable right not to be made to suffer and not to be killed, but he argues that they do not have a prima facie right to liberty. Because most animals possess no interest in leading freely chosen lives, humans have no moral obligation to liberate them. Moving beyond theory to the practical aspects of applied ethics, this pragmatic volume provides much-needed perspective on the realities and responsibilities of the human-animal relationship. (shrink)

This chapter presents an overview of the issues that arise when logic is used in helping to understand problems in intelligent reasoning and to guide the design of mechanized reasoning systems. It provides some historical and technical details concerning nonmonotonic logic and reasoning about action and change, a topic that is not only central in artificial intelligence but that is normally of considerable interest to philosophers. The remaining sections provide brief sketches of selected topics, with references to the primary literature.

There is now widespread agreement that many non-human animals are sentient, and that this fact has important moral and political implications. This book is devoted to sketching what this 'sentientist politics' might look like.

'I know what you're thinking' is a fascinating exploration into the neuroscientific evidence on 'mind reading'.

We present a unified empirical and philosophical account of moral consistency reasoning, a distinctive form of moral reasoning that exposes inconsistencies among moral judgments about concrete cases. Judgments opposed in belief or in emotion and motivation are inconsistent when the cases are similar in morally relevant respects. Moral consistency reasoning, we argue, regularly shapes moral thought and feeling by coordinating two systems described in dual process models of moral cognition. Our empirical explanation of moral change fills a gap in the (...) empirical literature, making psychologically plausible a defensible new model of justified moral change and a hybrid theory of moral judgment. (shrink)

1 Background for the Uninitiated RICHMOND CAMPBELL Paradoxes are intrinsically fascinating. They are also distinctively ...

Modern epistemology has run into several paradoxes in its efforts to explain how knowledge acquisition can be both socially based and still able to determine objective facts about the world. In this important book, Richmond Campbell attempts to dispel some of these paradoxes, to show how they are ultimately just "illusions of paradox," by developing ideas central to two of the most promising currents in epistemology: feminist epistemology and naturalized epistemology. Campbell's aim is to construct a coherent theory of (...) knowing that is feminist and "naturalized." Illusions of Paradox will be valuable for students and scholars of epistemology and women's studies. (shrink)

This book brings together two experienced educators from the fields of teacher education and arts education. The authors Richmond, a photographer, and Snowber, a dancer and poet, see aesthetic education as aiming to extend creativity, appreciation of the arts and nature, and the sensuous qualities of everyday life, to gain a more intimate understanding of the self and the world. They include poetic, narrative, philosophical, and artistic ways of writing to support a more embodied and holistic aesthetics. Landscapes of (...) Aesthetic Education has significance for educators, scholars, students, and artists, and for all who would like to explore the connections between the arts, aesthetics, and transformation. (shrink)