A book on the notion of fundamental length, covering issues in the philosophy of math, metaphysics, and the history and the philosophy of modern physics, from classical electrodynamics to current theories of quantum gravity. Published (2014) in Cambridge University Press.

Saul Smilansky presents an original new approach to the problem of free will, which lies at the heart of morality and self-understanding. He maintains that the key to the problem is the role played by illusion. Smilansky boldly claims that we could not live adequately with a complete awareness of the truth about human freedom and that illusion lies at the center of the human condition.

The compatibility question lies at the center of the free will problem. Compatibilists think that determinism is compatible with moral responsibility and the concomitant notions, while incompatibilists think that it is not. The topic of this paper is a particular form of charge against compatibilism: that it is shallow. This is not the typical sort of argument against compatibilism: most of the debate has attempted to discredit compatibilism completely. The Argument From Shallowness maintains that the compatibilists do have a case. (...) However, this case is only partial, and shallow. This limited aim proves itself more powerful against compatibilists than previous all-or-nothing attempts. It connects to the valid instincts of compatibilists, making room for them, and hence is harder for compatibilists to ignore. (shrink)

Among the alternatives of non-relativistic quantum mechanics (NRQM) there are those that give different predictions than quantum mechanics in yet-untested circumstances, while remaining compatible with current empirical findings. In order to test these predictions, one must isolate one’s system from environmental induced decoherence, which, on the standard view of NRQM, is the dynamical mechanism that is responsible for the ‘apparent’ collapse in open quantum systems. But while recent advances in condensed-matter physics may lead in the near future to experimental setups (...) that will allow one to test the two hypotheses, namely genuine collapse vs. decoherence, hence make progress toward a solution to the quantum measurement problem, those philosophers and physicists who are advocating an information-theoretic approach to the foundations of quantum mechanics are still unwilling to acknowledge the empirical character of the issue at stake. Here I argue that in doing so they are displaying an unwarranted double standard. r 2007 Elsevier Ltd. All rights reserved. (shrink)

Drawing on feminist and queer critiques that see violence as constitutive of identities, this essay points to subject-positions whose construction is necessarily conditioned by exercising violence. Focusing on settler colonialism, I reverse the optics of the first set of critiques: rather than seeing the self as taking form through the injuries she suffers, I try to understand selves that are structurally constituted by causing injury to others. This analysis refuses the assumption that violence is in conflict with (liberal) identity, and (...) that, therefore, the endurance of violence of liberal states/societies is dependent upon mechanisms of active blindness (or denial, deferral, and other forms of dissociation). I argue that this assumption, which is shared by many critiques of violence, fails to perceive that people can desire the violent arrangements supporting their communities. They therefore fail to address political settings wherein violence is an affirmative element of political identities. (shrink)

Relying on the universality of quantum mechanics and on recent results known as the “threshold theorems,” quantum information scientists deem the question of the feasibility of large‐scale, fault‐tolerant, and computationally superior quantum computers as purely technological. Reconstructing this question in statistical mechanical terms, this article suggests otherwise by questioning the physical significance of the threshold theorems. The skepticism it advances is neither too strong (hence is consistent with the universality of quantum mechanics) nor too weak (hence is independent of technological (...) contingencies). *Received June 2009; revised August 2009. †To contact the author, please write to: Department of History and Philosophy of Science, College of Arts and Sciences, Indiana University, Bloomington, IN 47405; e‐mail: [email protected]. (shrink)

Morally, when should one retire from one’s job? The surprising answer may be ‘now’. It is commonly assumed that for a person who has acquired professional training at some personal effort, is employed in a task that society considers useful, and is working hard at it, no moral problem arises about whether that person should continue working. I argue that this may be a mistake: within many professions and pursuits, each one among the majority of those positive, productive, hard working (...) people ought to consider leaving his or her job. (shrink)

A recent attempt to compute a (recursion‐theoretic) noncomputable function using the quantum adiabatic algorithm is criticized and found wanting. Quantum algorithms may outperform classical algorithms in some cases, but so far they retain the classical (recursion‐theoretic) notion of computability. A speculation is then offered as to where the putative power of quantum computers may come from.

I discuss a rarely mentioned correspondence between Einstein and Swann on the constructive approach to the special theory of relativity, in which Einstein points out that the attempts to construct a dynamical explanation of relativistic kinematical effects require postulating a fundamental length scale in the level of the dynamics. I use this correspondence to shed light on several issues under dispute in current philosophy of spacetime that were highlighted recently in Harvey Brown’s monograph Physical Relativity, namely, Einstein’s view on the (...) distinction between principle and constructive theories, and the consequences of pursuing the constructive approach in the context of spacetime theories. r 2008 Elsevier Ltd. All rights reserved. (shrink)

A recent proposal to solve the halting problem with the quantum adiabatic algorithm is criticized and found wanting. Contrary to other physical hypercomputers, where one believes that a physical process “computes” a (recursive-theoretic) non-computable function simply because one believes the physical theory that presumably governs or describes such process, believing the theory (i.e., quantum mechanics) in the case of the quantum adiabatic “hypercomputer” is tantamount to acknowledging that the hypercomputer cannot perform its task.

This article tells the story of Ed Fredkin, a pilot, programmer, engineer, hardware designer and entrepreneur, whose work inside and outside academia has influenced major developments in computer science and in the foundations of theoretical physics for the past fifty years.

Denialism concerning free will and moral responsibility combines, in its minimal form, the rejection of libertarian free will and the rejection of compatibilism. I will address the more ambitiously “happy” or “optimistic” version of denialism, which also claims that we are better off without belief in free will and moral responsibility, and ought to try to radically reform our moral, social and personal lives without such beliefs. I argue that such denialism involves, for various reasons, a dangerous gamble, which it (...) would be morally irresponsible to follow. I conclude by reflecting upon the implications. (shrink)

Loop quantum gravity predicts that spatial geometry is fundamentally discrete. Whether this discreteness entails a departure from exact Lorentz symmetry is a matter of dispute that has generated an interesting methodological dilemma. On one hand one would like the theory to agree with current experiments, but, so far, tests in the highest energies we can manage show no such sign of departure. On the other hand one would like the theory to yield testable predictions, and deformations of exact Lorentz symmetry (...) in certain yet– to–be–tested regimes may have phenomenological consequences. Exposing their shortcomings, here I discuss two arguments that exemplify this dilemma, and compare them to other cases from the history of physics that share their symptoms. (shrink)

The paper examines when unilateral and bilateral pretence may be beneficial distinguishing between positive and negative externalities. Using a two-player single period game and defining altruism, selfishness and meanness as "sentimental continuity" it is shown how the optimal level of the pretended sentimentality is determined. The novelty of the model is that the optimal degree of altruism (meanness) depends on the extent of the positive (negative) externalities.

Haṭhayoga texts, influential in the development of modern posture-based yoga, offer a conceptual framework intertwining physical cultivation, health, and soteriological aims. This article explores two interconnected inquiries regarding early Haṭhayoga texts: How do they conceptualize health, and how do they perceive the relationship between health and soteriology? These investigations illuminate the place of health in early yoga texts within Hindu traditions prior to its global recognition. This article reveals that early _haṭha_ texts present a holistic approach to health, highlighting the (...) interconnectedness of curing the mind and healing the body. This process entails not only eradicating physical diseases but also the transcendence of all forms of suffering. The transformative process of eliminating the misleading self-identity (_ahaṁkāra_) is pivotal, leading directly to health. This relationship extends beyond metaphorical comparisons of healing ignorance and suffering. This ontological framework proposes a harmonious integration between the material and soteriological realms, viewing the healthy body as a physical manifestation of the divine essence. Thus, the emergence of the biomedical discourse surrounding yoga in modern times did not occur autonomously. Haṭhayoga, with its roots dating back to the beginning of the second millennium CE, played a crucial role in shaping this historical transformation. (shrink)

One defining feature of the Hindu religious worldviews is a belief in the impermanence of the body and its perception as a source of suffering due to a misguided attachment of the self to its corporeal manifestation. This view is expressed in several important traditions, including classical yoga, which perceives the physical body as an impediment to attaining liberation and irrelevant in the state of liberation.However, the perception of the physical body in liberation is going through ontological changes in early (...) medieval Haṭhayoga texts. The dichotomy between embodied and disembodied states of the body when one is liberated is the focus of this article. In several medieval yoga texts dating between the eleventh and the fifteenth centuries, the ontological immortal state of living liberation is more similar to physical death. Often the exact text holds both views of embodied and disembodied states simultaneously with no overt inconsistency. I argue that these tensions and contradictions can be explained in two ways: by looking at the assessed timeline of the texts and by reflecting on their sectarian and social origin. (shrink)

In Free Will, Agency, and Meaning in Life, Derk Pereboom proposes an optimistic model of life that follows on the rejection of both libertarian and compatibilist beliefs in free will, moral responsibility, and desert. I criticize his views, focusing on punishment. Pereboom responds to my earlier argument that hard determinism must seek to revise the practice of punishment in the direction of funishment, whereby the incarcerated are very generously compensated for the deprivations of incarceration. I claimed that funishment is a (...) practical reductio: of hard determinism. Pereboom replies, but I claim that he misses a key component of my reductio, the idea that moving in the direction of funishment will considerably weaken the deterrence of potential criminals so that hard determinism becomes self-defeating in practice. Beyond the challenge of funishment, I raise various other difficulties with Pereboom’s model, concerning its deeply unintuitive implications, the harm it does to the motivation of potential criminals, its weakness in resisting utilitarian-like dangers, and more. Our conclusions should lead to a re-evaluation of the compatibilist interpretation of moral life, as a richer, more plausible, and safer interpretation than hard determinism. This needs to be combined with a true hard determinist acknowledgment of the deep injustice and tragedy involved in punishment in light of the absence of libertarian free will. Such a complex view will come closer to doing justice to notions of justice, morality, and decency. (shrink)

Looking at one site, the Israeli checkpoints in the occupied Palestinian territory, this article seeks to understand the mechanisms by which violence can present itself as justifiable (or justified), even when it materializes within frames presumably set to annul it. We look at the checkpoints as a condensed microcosmos operating within two such frames. One is the prolonged Israeli-Palestinian ‘peace process’ (the checkpoints became a primary technology of control in the period following the beginning of the peace process), and the (...) other is regulatory power (disciplinary and biopower), which in the Foucauldian framework presumably sidelines the violent form which sovereign power takes. We argue that the checkpoints, which dissect the Palestinian occupied territories into dozens of enclaves and which are one of the most effective and destructive means of control within the current stage of occupation, can be seen as more than obstacles in the way of Palestinian movement; we suggest that they also function as corrective technologies that are meant to fail. It is with this failure that violence can appear as justified. In order to show the operation of this embedded failure, we examine one mechanism operating within the checkpoints: ‘the imaginary line’. The imaginary line is both a component within, and an emblem of a mode of control that constantly undoes itself in order to summon violence. Since it is never visibly marked in the physical space, the imaginary line is bound to be unintentionally crossed, thereby randomly rendering Palestinians as ‘transgressors’ of the rule and thus facilitating eruptions of violence by the soldiers stationed at the checkpoints. This article proposes an analysis of this hidden demarcation of space in order to question the different relations between subjects and power which it both assumes and constitutes. (shrink)

This essay traces the evocations of the Chinese practice of foot-binding in Western political thought. I examine the changing deployments of the image: as a contrast to European freedom or as a mirror reflecting its own limitations. The bound feet not merely illustrate a lack of freedom through an image of disabled mobility. They also situate freedom within global and gendered frameworks. Via a reading of the image and its contexts, we see that European freedom-as-movement emerged on the backdrop of (...) two imperial contrasts: images of nomadism, which are only marginally considered in this paper, and an assumed stagnation, that presumably prevailed in the East. Yet surprisingly, the image was often evoked to say something about Europe itself, rather than about its “others.” Therefore, it also reveals the corporeal dimensions of a concept of freedom that has underlaid a long liberal tradition. The crushed and squeezed feet of girls in China thus marked both a gendered and an imperial divide between those who can move freely, and therefore rule, and those who cannot rule because of their lack of mobility; yet at the same time, it undid this division by allowing the East and its stationariness to permeate Europe through a multiply foreign body: feminized, racially alien, and geographically distanced. (shrink)

Combining physics, mathematics and computer science, quantum computing and its sister discipline of quantum information have developed in the past few decades from visionary ideas to two of the most fascinating areas of quantum theory. General interest and excitement in quantum computing was initially triggered by Peter Shor (1994) who showed how a quantum algorithm could exponentially “speed-up” classical computation and factor large numbers into primes far more efficiently than any (known) classical algorithm. Shor’s algorithm was soon followed by several (...) other algorithms that aimed to solve combinatorial and algebraic problems, and in the years since theoretical study of quantum systems serving as computational devices has achieved tremendous progress. Common belief has it that the implementation of Shor’s algorithm on a large scale quantum computer would have devastating consequences for current cryptography protocols which rely on the premise that all known classical worst-case algorithms for factoring take time exponential in the length of their input (see, e.g., Preskill 2005). Consequently, experimentalists around the world are engaged in attempts to tackle the technological difficulties that prevent the realisation of a large scale quantum computer. But regardless whether these technological problems can be overcome (Unruh 1995; Ekert and Jozsa 1996; Haroche and Raimond 1996), it is noteworthy that no proof exists yet for the general superiority of quantum computers over their classical counterparts. -/- The philosophical interest in quantum computing is manifold. From a social-historical perspective, quantum computing is a domain where experimentalists find themselves ahead of their fellow theorists. Indeed, quantum mysteries such as entanglement and nonlocality were historically considered a philosophical quibble, until physicists discovered that these mysteries might be harnessed to devise new efficient algorithms. But while the technology for harnessing the power of 50–100 qubits (the basic unit of information in the quantum computer) is now within reach (Preskill 2018), only a handful of quantum algorithms exist, and the question of whether these can truly outperform any conceivable classical alternative is still open. From a more philosophical perspective, advances in quantum computing may yield foundational benefits. For example, it may turn out that the technological capabilities that allow us to isolate quantum systems by shielding them from the effects of decoherence for a period of time long enough to manipulate them will also allow us to make progress in some fundamental problems in the foundations of quantum theory itself. Indeed, the development and the implementation of efficient quantum algorithms may help us understand better the border between classical and quantum physics (Cuffaro 2017, 2018a; cf. Pitowsky 1994, 100), and perhaps even illuminate fundamental concepts such as measurement and causality. Finally, the idea that abstract mathematical concepts such as computability and complexity may not only be translated into physics, but also re-written by physics bears directly on the autonomous character of computer science and the status of its theoretical entities—the so-called “computational kinds”. As such it is also relevant to the long-standing philosophical debate on the relationship between mathematics and the physical world. (shrink)

Recent suggestions to supply quantum mechanics (QM) with realistic foundations by reformulating it in light of quantum information theory (QIT) are examined and are found wanting by pointing to a basic conceptual problem that QIT itself ignores, namely, the measurement problem. Since one cannot ignore the measurement problem and at the same time pretend to be a realist, as they stand, the suggestions to reformulate QM in light of QIT are nothing but instrumentalism in disguise.

ABSTRACT All ethical systems seem to call for more ethical sensitivity. The dangers to personal life of too much ethical sensitivity have received much attention lately, in attempts to limit the demands of morality. But the ethical dangers of ethical sensitivity have hardly been noticed. I argue that, in a number of different ways, too much ethical sensitivity can be ethically harmful. The normative, the psychological and the pragmatic pictures are for more complex than is commonly realised.

Sir Peter Strawson’s ‘Freedom and Resentment’ was a landmark in the philosophical understanding of the free will problem. Building upon it, I attempt to defend a novel position, which purports to provide, in outline, the next step forward. The position presented is based on the descriptively central and normatively crucial role of illusion in the issue of free will. Illusion, I claim, is the vital but neglected key to the free will problem. The proposed position, which may be called ‘Illusionism’, (...) is shown to follow both from the strengths and from the weaknesses of Strawson’s position. (shrink)

I discuss the philosophical implications that the rising new science of quantum computing may have on the philosophy of computer science. While quantum algorithms leave the notion of Turing-Computability intact, they may re-describe the abstract space of computational complexity theory hence militate against the autonomous character of some of the concepts and categories of computer science.

I point out an odd consequence of the role that broadly pragmatic considerations regularly play in determining moral demands. As a result of the way in which moral demands are formed, it turns out that people will frequently become morally good in a strange and rather dubious way. Because human beings are not very good, we will lower our moral demands and, as a result, most people will turn out, in an important sense, to be morally good. Our relative badness, (...) by giving us good reasons to limit moral demands, makes us morally good. (shrink)

This article examines the cultural ways in which traditional Judaism understands the relationship between an individual and Divinity. The article shows that this understanding has deep gendered dimensions. Grounded in feminist critiques of theology, as well as in Jewish studies and cultural studies, the article shows that the conceptualization of God-person relationship, in both Orthodox and Kaballic Jewish streams, is based on a hierarchical division to three different spaces. These spaces are: Mitzvah, Grace, and Desire or Will. The Mitzvah is (...) perceived to be the highest space and is represented as 'manly'. The intermediate space-Grace-is represented as a 'good woman' or as 'mother'. This space is characterized by a sacred yearning, as well as by lack of stability and continuity, paralysis, and even death. The lowest space is the space of Desire and personal will, which is culturally represented by a child or a whore-woman. This space is characterized by an attitude of disregard, resistance and fear. The article demonstrates how this cultural division of Divinity in to three, contradicts the declared Jewish position that God/divinity is 'One, Sole and Unique', and points at the inherent need of genderless conceptualization of Divinity in Judaism. (shrink)

People do good or bad things, and get or do not get good or bad credit for their actions, depending (in part) on knowledge of their actions. I attempt to unfold some of the interconnections between these matters, and between them and the achievement of moral worth. The main conclusion is that the heights of moral worth seem to appear in the oddest places.

This chapter contains section titled: The Conceptual Paradox of Blackmail The Substantive Paradox.

We sometimes harm people legitimately, by standing in front of them in the queue at the cinema and buying the last available ticket, for instance, or by acting in self-defense. If we harm them illegitimately, however, we ostensibly have a moral obligation to compensate them for the harm done. And the more we harm them, the greater the compensation that, prima facie, we need to offer. But if the harm increases further, at some point we will need to offer less (...) compensation. Yet more harm, and it is quite likely that no compensation at all will be morally expected. In such situations, the greater the harm, the better off we will be, morally, in one important respect. This is morally absurd but, I claim, true, and it does not appear to have received significant philosophical attention. I explore the issue. (shrink)

We live within political systems that increasingly seek to control movement, organized around both the desire and ability to determine who is permitted to enter what sorts of spaces, from gated communities to nation-states. In _Movement and the Ordering of Freedom_, Hagar Kotef examines the roles of mobility and immobility in the history of political thought and the structuring of political spaces. Ranging from the writings of Locke, Hobbes, and Mill to the sophisticated technologies of control that circumscribe the (...) lives of Palestinians in the Occupied West Bank, this book shows how concepts of freedom, security, and violence take form and find justification via “regimes of movement.” Kotef traces contemporary structures of global mobility and resistance to the schism in liberal political theory, which embodied the idea of “liberty” in movement while simultaneously regulating mobility according to a racial, classed, and gendered matrix of exclusions. (shrink)