Essay Review of Tim Maudlin's "The Metaphysics within Physics", Oxford University Press, 2007.

Review article to Gordon Belot's Geometric Possibility.

A review of Tim Maudlin's "Philosophy of Physics: Space and Time".

Tim Maudlin sets out a completely new method for describing the geometrical structure of spaces, and thus a better mathematical tool for describing and understanding space-time. He presents a historical review of the development of geometry and topology, and then his original Theory of Linear Structures.

In this ingenious and powerfully argued book Tim Maudlin sets out a novel account of logic and semantics which allows him to deal with certain notorious paradoxes which have bedevilled philosophical theories of truth. All philosophers interested in logic and language will find this a stimulating read.

This essay is the first act of a two-act play. My ultimate aim is to defend a simple proposition: time passes. To be more precise, I want to defend the claim that the passage of time is an intrinsic asymmetry in the structure of space-time itself, an asymmetry that has no spatial counterpart and is metaphysically independent of the material contents of space-time. It is independent, for example, of the entropy gradient of the universe. This view is part of common-sense, (...) but has been widely attacked by philosophers. The passage of time, we are told, is a myth, an illusion, even an incoherent notion. Because the notion that time passes is common sense, it perhaps requires little positive defence; if there are no weighty objections to the view, it ought to be accepted. So the first, and more important, act of the play is defusing the arguments which have been used to cast doubt on the passage of time. I have positive arguments to give, but not having space for them here, I will confine myself to an examination of the common philosophical arguments that have been used to cast doubt on the passage of time. (shrink)

I argue that Norton & Earman's hole argument, despite its historical association with General Relativity, turns upon very general features of any linguistic system that can represent substances by names. After exploring various means by which mathematical objects can be interpreted as representing physical possibilities, I suggest that a form of essentialism can solve the hole dilemma without abandoning either determinism or substantivalism. Finally, I identify the basic tenets of such an essentialism in Newton's writings and consider how they can (...) be updated to apply to the case provided by General Relativity. (shrink)

This paper sketches a taxonomy of forms of substantivalism and relationism concerning space and time, and of the traditional arguments for these positions. Several natural sorts of relationism are able to account for Newton's bucket experiment. Conversely, appropriately constructed substantivalism can survive Leibniz's critique, a fact which has been obscured by the conflation of two of Leibniz's arguments. The form of relationism appropriate to the Special Theory of Relativity is also able to evade the problems raised by Field. I survey (...) the effect of the General Theory of Relativity and of plenism on these considerations. (shrink)

The basic idea of Maudlin's superb book is methodological: ‘metaphysics, insofar as it is concerned with the natural world, can do no better than to reflect on physics. Physical theories provide us with the best handle we have on what there is, and the philosopher's proper task is the interpretation and elucidation of those theories. In particular, when choosing the fundamental posits of one's ontology, one must look to scientific practice rather than to philosophical prejudice’ .The apparently diverse topics (...) covered by the book's six chapters are united in bearing out this basic idea. They do so with considerable care and sophistication. The chapters also champion a campaign against David Lewis's thesis of Humean Supervenience. Lewis's thesis says that everything actual supervenes on the distribution of intrinsic qualities across points in space-time.Chapter 1 claims that laws of …. (shrink)

The meaning and truth conditions for claims about physical modality and causation have been considered problematic since Hume’s empiricist critique. But the underlying semantic commitments that follow from Hume’s empiricism about ideas have long been abandoned by the philosophical community. Once the consequences of that abandonment are properly appreciated, the problems of physical modality and causal locutions fall away, and can be painlessly solved.

This chapter contains sections titled: Galilean Transformations and Galilean Invariants A Brief Preliminary: Why Worry? Lorentz Invariance: Collapse Theories Lorentz Invariance: Hyperplane Dependence Lorentz Invariance: Non‐Collapse Theories Choose Your Poison.

It is a truth universally acknowledged that quantum mechanics is (somehow or other) screwy. That is, the ‘picture of the world’ presented by quantum mechanics i.

This chapter contains sections titled: The State of Play Particles and Relativistic Mass Increase Tachyons.

This chapter contains sections titled: Polarization Light Quanta The Entangled State How Do They Do It? Bell's Theorem(s) Aspect's Experiment What Is Weird About the Quantum Connection? Appendix A: The GHZ Scheme.

This paper demonstrates that John Wheeler and Richard Feynman's strategy for avoiding causal paradoxes threatened by backward causation and time-travel can be defeated by designing self-interacting mechanisms with a non-simple topological structure. Time-travel therefore requires constraints on the allowable data on space-like hypersurfaces. The nature and significance of these constraints is discussed.

Time travel has been a staple of science fiction. With the advent of general relativity it has been entertained by serious physicists. But, especially in the philosophy literature, there have been arguments that time travel is inherently paradoxical. The most famous paradox is the grandfather paradox: you travel back in time and kill your grandfather, thereby preventing your own existence. To avoid inconsistency some circumstance will have to occur which makes you fail in this attempt to kill your grandfather. Doesn't (...) this require some implausible constraint on otherwise unrelated circumstances? We examine such worries in the context of modern physics. (shrink)

Review of Tim Maudlin: 'The Metaphysics Within Physics', Oxford: Oxford University Press, 2007.

We criticize speculations to the effect that quantum mechanics is fundamentally about information. We do this by pointing out how unfounded such speculations in fact are. Our analysis focuses on the dubious claims of this kind recently made by Anton Zeilinger.

In lieu of an abstract, here is a brief excerpt of the content:Reviewed by:Philosophers' Walks by Bruce BaughTim IngoldBaugh, Bruce. Philosophers' Walks. Routledge, 2022. 252pp.Yesterday evening, much to my satisfaction, I finished reading Bruce Baugh's Philosophers' Walks. The author ends by putting down his pen. It is time, he declares, "to put my boots on and walk out into the world" (236). For me, it was bedtime, but knowing that I was to write this review, I resolved to sleep (...) on it. On waking, I set out, as is my wont, for the short walk I take every morning before breakfast. The walk itself is nothing special: it takes in the streets of my neighborhood and a nearby park. Yet every day is different as the weather changes, trees come in and out of leaf, blooms flourish and wilt in front gardens, children on their way to school throng the streets in term-time only to vanish in vacations. Lately, a nineteenth-century fountain in the park has been lovingly restored, and every morning I am refreshed by its water-jets and tinkly sound. Most days I am writing in my head, on whatever I have on the go at the time. Walking briskly and on my own, I find that words that had tied me in knots the day before miraculously straighten themselves out with a rhythm and fluency matching my pace. I cannot, however, walk and write at the same time. It is physically impossible. So as the words come, I have to keep repeating them to myself, until I make it home. With no time to lose, I seize notebook, pencil, and spectacles to jot them down. Only when I have done so can I finally sit down to breakfast. And that's exactly what happened this morning. With my hastily scribbled notes, some good words, and the odd finished sentence, I am ready to write this review.I am not, of course, the first to have discovered the benefits of thinking-while-walking. Countless predecessors have done so before me, including some of the most celebrated figures of the past four centuries of European intellectual history. And so has Baugh. The idea behind his book is that if by walking, philosophers have arrived at many of their most cherished insights, then perhaps we could better take the measure of these insights not merely by reading their words but by retracing their steps, walking the same paths as they did. And this, precisely, is what [End Page 131] Baugh, often accompanied by his wife Diane Lindsay, set out to do. Each chapter, barring the introduction and conclusion, is devoted to one or sometimes two characters, and each blends reflection on their ideas and life-histories of walking with the author's recollection of attempting to follow in their footsteps, and of the experience and even self-knowledge gained from doing so. Some walks are in verdant countryside, or more spectacular Alpine scenery, others are in big cities like London and Paris. Baugh does not pretend that the walks of his chosen characters can be replicated exactly when so much has changed, in both rural areas and the urban fabric, since their heydays. Nor can we ever know exactly what was going through their heads at the time. It is nevertheless surprising how many echoes you can pick up from the past, so long as you keep your ears to the ground, and Baugh is an astute listener. For us, his readers, the book is an invitation to join in his travels, albeit at a distance, and by doing so, to enrich our understanding not only of his characters and of how they thought, but of ourselves as well.Though the book is called Philosophers' Walks, Baugh has cast his net wide to include characters for whom the epithet "poet," "artist," or "writer" might sooner come to mind than "philosopher." No matter: all such labels are a touch arbitrary, and it's the thought that counts. So here they are, in chronological order (not the order in which they appear in the book): Pierre Grassendi, Jean-Jacques Rousseau, Samuel Taylor Coleridge, Søren Kierkegaard, Friedrich Nietzsche, Virginia Woolf, André Breton, Jean-Paul Sartre, Simone de... (shrink)