Quantum physics is believed to be the fundamental theory underlying our understanding of the physical universe. However, it is based on concepts and principles that have always been difficult to understand and controversial in their interpretation. This book aims to explain these issues using a minimum of technical language and mathematics. After a brief introduction to the ideas of quantum physics, the problems of interpretation are identified and explained. The rest of the book surveys, describes and criticises a range of (...) suggestions that have been made with the aim of resolving these problems; these include the traditional, or 'Copenhagen' interpretation, the possible role of the conscious mind in measurement, and the postulate of parallel universes. This new edition has been revised throughout to take into account developments in this field over the past fifteen years, including the idea of 'consistent histories' to which a completely new chapter is devoted. (shrink)

Kant’s claim that we are ignorant of things in themselves is a claim that we cannot know ‘the intrinsic nature of things’, or so at least I argued in Kantian Humility.2 I’m delighted to find that Lucy Allais is in broad agreement with this core idea, thinking it represents, at the very least, a part of Kant’s view. She sees some of the advantages of this interpretation. It has significant textual support. It does justice to Kant’s sense that we are (...) missing out on something, in our failure to know things as they are in themselves. And it makes tellable, after all, Kant’s at first sight untellable tale, about the knowable existence of unknowable things: for we can know that things exist, without knowing what their intrinsic properties are. However, Allais is critical of the way I fill out this core idea, and she has an alternative to offer. She thinks Kant’s distinction between things in themselves and phenomena is not a distinction between two kinds of properties, intrinsic and relational. She is critical of my interpretation of causal powers, which I take to be the relevant relational properties: my idea, first, that causal powers are in fact relational properties; second, that causal powers are only contingently associated with intrinsic properties, so that creating substances with intrinsic properties is insufficient for creating causal power; and, third, that intrinsic properties are causally inert. Her criticisms of these three ideas.. (shrink)

This w ork starts from a reali t y , that of the immense number of forced mi g rants/ refugees w ho, as victims of forces th e y cannot control resulting from the mass i v e economic, social and political uphe a v als, go to and fro in rapid and ceaseless m o v ement. This fl o w of millions of ind i viduals is not e f fect i v e l y r e (...) gulated b y the states. The l e gal-political inst r uments, w hich in the past confronted on l y v ague l y similar pro b lems, are tod a y complete l y inadequate. The concept of citizenship based on national identity is un a b le to sol v e the di f f iculties arising from a g r o wing demand for justice, for rights, b y a population that w ants to stop being treated as an object but that does not belong to a speci f ic identity nor desires it . Th e solution proposed is the defense of a un i v ersal conception of human rights requiring inte r national cou r ts capa b le of enforcing them. (shrink)

Starting at the beginning: what's so good about being good? -- Theological ethics: where does morality come from? -- Cultural views of morality: why can't we make up our own moral rules for ourselves? -- Making ethical decisions: when I'm in a moral dilemma, what do I do? -- Abortion: how can you say that a pregnant seventeen-year-old, for whom having the baby will ruin her life, is doing something wrong by having an abortion? -- Reproductive technologies: what do you (...) say to infertile couples about the hi-tech ways to have a baby? -- Genetics and biotechnology: what do you tell couples who want to use biotechnology to produce designer children? -- Death, dying, and assisted suicide: don't people have a fundamental right to die? -- Capital punishment: isn't the death penalty a barbaric holdover from uncivilized cultures that should be done away with today? -- War and morality: in view of the Bible's teaching to love your enemies, why isn't every Christian a pacifist? -- Sexual ethics: shouldn't people be able to love and have sex with whomever they choose? -- Christian ethics, economics, and the workplace: how does my work connect to my spiritual life and my service to God? (shrink)

... all probability, Plato's own statement; made indeed to be read by friends in Syracuse in explanation of the role he had played ...

I M M Gregory; The Right to Education, Journal of Philosophy of Education, Volume 7, Issue 1, 30 May 2006, Pages 85–102, https://doi.org/10.1111/j.1467-9752.197.

I M M Gregory, R G Woods; Indoctrination, Journal of Philosophy of Education, Volume 4, Issue 1, 30 May 2006, Pages 77–105, https://doi.org/10.1111/j.1467-9752.

Distinctions in fundamentality between different levels of description are central to the viability of contemporary decoherence-based Everettian quantum mechanics (EQM). This approach to quantum theory characteristically combines a determinate fundamental reality (one universal wave function) with an indeterminate emergent reality (multiple decoherent worlds). In this chapter I explore how the Everettian appeal to fundamentality and emergence can be understood within existing metaphysical frameworks, identify grounding and concept fundamentality as promising theoretical tools, and use them to characterize a system of explanatory (...) levels (with associated laws of nature) for EQM. This Everettian level structure encompasses and extends the ‘classical’ levels structure. The ‘classical’ levels of physics, chemistry, biology, etc. are recovered, but they are emergent in character and potentially variable across Everett worlds. EQM invokes an additional fundamental level, not present in the classical levels picture, and a novel potential role for self-location in interlevel metaphysics. When given a modal realist interpretation, EQM also makes trouble for supervenience-based approaches to levels. (shrink)

David Wallace has given a decision-theoretic argument for the Born Rule in the context of Everettian quantum mechanics. This approach promises to resolve some long-standing problems with probability in EQM, but it has faced plenty of resistance. One kind of objection charges that the requisite notion of decision-theoretic uncertainty is unavailable in the Everettian picture, so that the argument cannot gain any traction; another kind of objection grants the proof’s applicability and targets the premises. In this article I propose some (...) novel principles connecting the physics of EQM with the metaphysics of modality, and argue that in the resulting framework the incoherence problem does not arise. These principles also help to justify one of the most controversial premises of Wallace’s argument, ‘branching indifference’. Absent any a priori reason to align the metaphysics with the physics in some other way, the proposed principles can be adopted on grounds of theoretical utility. The upshot is that Everettians can, after all, make clear sense of objective probability. 1 Introduction2 Setup3 Individualism versus Collectivism4 The Ingredients of Indexicalism5 Indexicalism and Incoherence5.1 The trivialization problem5.2 The uncertainty problem6 Indexicalism and Branching Indifference6.1 Introducing branching indifference6.2 The pragmatic defence of branching indifference6.3 The non-existence defence of branching indifference6.4 The indexicalist defence of branching indifference7 Conclusion. (shrink)

In Plato’s Theaetetus , Socrates is portrayed as a midwife to the intellect, a metaphor for his task as a dialectician as he seeks to help give birth to wisdom. Thus it is that the author refers to Plato as the midwife’s apprentice. This volume represents an attempt to provide a more manageable account of the author’s two volume magnum opus, An Examination of Plato’s Doctrines . An accessible and lucid introduction to Plato’s ideas is provided which nonetheless challenges traditional (...) interpretations. In particular the author is concerned to offer an interpretation of the significance of what Plato said. The chapters are arranged by topic, for ease of comprehension. (shrink)

In Plato’s _Theaetetus_, Socrates is portrayed as a midwife to the intellect, a metaphor for his task as a dialectician as he seeks to help give birth to wisdom. Thus it is that the author refers to Plato as the midwife’s apprentice. This volume represents an attempt to provide a more manageable account of the author’s two volume magnum opus, _An Examination of Plato’s Doctrines_. An accessible and lucid introduction to Plato’s ideas is provided which nonetheless challenges traditional interpretations. In (...) particular the author is concerned to offer an interpretation of the significance of what Plato said. The chapters are arranged by topic, for ease of comprehension. (shrink)