ZusammenfassungAls Folge der voranschreitenden Digitalisierung und der COVID-19 Pandemie steigt die Nachfrage nach Indoor-Cycling Plattformen wie ‘Peloton’ exponentiell. Das Ziel dieses Beitrags ist es zu untersuchen, welche Faktoren die Nutzung von Indoor-Cycling Plattformen nachhaltig beeinflussen. Dafür wurde auf Basis der ‚Unified Theory of Acceptance and Use of Technology‘ ein kontextspezifisches Forschungsmodell abgeleitet, das auf Grundlage einer Befragung von 313 Nutzer/innen und des über die Plattform gemessenen Nutzungsverhaltes, überprüft wurde. Die extrinsische Motivation wird insbesondere durch die Trainingsmöglichkeiten getrieben, während Unterstützung durch (...) Trainer/innen der Haupttreiber der intrinsischen Motivation ist. Soziale Interaktion beeinflusst beide Motivationsformen gleichermaßen. Intrinsische und extrinsische Motivation stellen starke Prädiktoren der Nutzungsintention dar, die wiederum nur mäßig die tatsächliche Nutzung beeinflusst, sodass sich Folgestudien stärker auf Barrieren der Nutzung fokussieren sollten. Die Multigruppenanalyse zeigt, dass der Zusammenhang zwischen Unterstützung durch Trainer/innen und extrinsischer sowie intrinsischer Motivation bei Männern signifikant höher ausgeprägt ist, als bei Frauen. Bei Frauen ist hingegen der Zusammenhang zwischen sozialer Interaktion und intrinsischer Motivation stärker ausgeprägt. (shrink)

Numerous approaches to a quantum theory of gravity posit fundamental ontologies that exclude spacetime, either partially or wholly. This situation raises deep questions about how such theories could relate to the empirical realm, since arguably only entities localized in spacetime can ever be observed. Are such entities even possible in a theory without fundamental spacetime? How might they be derived, formally speaking? Moreover, since by assumption the fundamental entities cannot be smaller than the derived and so cannot ‘compose’ them in (...) any ordinary sense, would a formal derivation actually show the physical reality of localized entities? We address these questions via a survey of a range of theories of quantum gravity, and generally sketch how they may be answered positively. (shrink)

This article argues that there can be epistemic dilemmas: situations in which one faces conflicting epistemic requirements with the result that whatever one does, one is doomed to do wrong from the epistemic point of view. Accepting this view, I argue, may enable us to solve several epistemological puzzles.

In some dark alley. . . Mugger: Hey, give me your wallet. Pascal: Why on Earth would I want to do that? Mugger: Otherwise I’ll shoot you. Pascal: But you don’t have a gun. Mugger: Oops! I knew I had forgotten something. Pascal: No wallet for you then. Have a nice evening. Mugger: Wait! Pascal: Sigh. Mugger: I’ve got a business proposition for you. . . . How about you give me your wallet now? In return, I promise to come (...) to your house tomorrow and give you double the value of what’s in the wallet. Not bad, eh? A 200% return on investment in 24 hours. (shrink)

“Motivational externalism” is the externalism until they see more of what view that moral judgements have no motisuch a theory would be like. The mere posvational efficacy in themselves, and that sibility of such a theory is not sufficiently when they motivate us, the source of motireassuring, even given strong arguments vation lies outside the moral judgement in against the opposite position. For there may a separate desire. Motivational externalism also be objections to externalism. contrasts with “motivational internalism,” Moral philosophers (...) have not spent much which is either the view that our moral effort spelling out the details of an exterjudgements are partly constituted by motinalist model of moral motivation. Those vation, or else that they would be if we who have endorsed externalism include were rational. The major problem for mo- Philippa Foot, Michael Stocker, David tivational internalism—in either guise—is Brink, Al Mele, Sigrún Svavarsdóttir, and that it flies in the face of common obsermyself (Foot 1972, Stocker 1979, Brink vation and first-personal experience of the 1989, 1997, Mele 1996, Svavarsdóttir fact that we can, without irrationality, be 1999, Zangwill 1999). But even these phiindifferent to morality. Philippa Foot piolosophers concentrated mostly on arguing neered this argument (Foot 1972). The pheagainst internalism or defending moral renomenon of indifference encourages alism rather than articulating the externalist motivational externalism. alternative. As a consequence, it is not clear This paper will not revisit this difficulty how the externalism that can be gleaned for internalism, but will travel in the opfrom these writings can be defended posite dialectical direction. The aim is to against various objections to externalism. expound and defend externalism, not to This paper is concerned to fashion an atargue against internalism. This paper will tractive version of externalism, and show address, and try to soothe away, the reluchow it evades objections. tance of many philosophers to embrace In section 1, a particular version of motimotivational externalism.. (shrink)

This paper investigates the significance of T-duality in string theory: the indistinguisha- bility with respect to all observables, of models attributing radically different radii to space – larger than the observable universe, or far smaller than the Planck length, say. Two interpretational branch points are identified and discussed. First, whether duals are physically equivalent or not: by considering a duality of the familiar simple harmonic oscillator, I argue that they are. Unlike the oscillator, there are no measurements ‘outside’ string theory (...) that could distinguish the duals. Second, whether duals agree or disagree on the radius of ‘target space’, the space in which strings evolve according to string theory. I argue for the latter position, because the alternative leaves it unknown what the radius is. Since duals are physically equivalent yet disagree on the radius of target space, it follows that the radius is indeterminate between them. Using an analysis of Brandenberger and Vafa (1989), I explain why – even so – space is observed to have a determinate, large radius. The conclusion is that observed, ‘phenomenal’ space is not target space, since a space cannot have both a determinate and indeterminate radius: instead phenomenal space must be a higher-level phenomenon, not fundamental. (shrink)

In this paper I argue that empty space can be heard. This position contrasts with the generally held view that the only things that can be heard are sounds, their properties, echoes, and perhaps sound sources. Specifically, I suggest that when sounds reverberate in enclosed environments we auditorily represent the volume of space surrounding us. Clearly, we can learn the approximate size of an enclosed space through hearing a sound reverberate within it, and so any account that denies that we (...) hear empty space must instead show how beliefs about volumes of space can be derived indirectly from what is heard. That is, if space is not auditorily represented when we hear sounds reverberate, what is? I consider whether hearing reverberation can be thought of as hearing a distinct sound, hearing echoes, or hearing a property of a sound. I argue that experiences of reverberation cannot be reduced to the perception of any of these types and that therefore empty space is represented in auditory perceptual content. In the final section I outline two ways in which space might be represented. (shrink)

Theodicy, the enterprise of searching for greater goods that might plausibly justify God’s permission of evil, is often criticized on the grounds that the project has systematically failed to unearth any such goods. But theodicists also face a deeper challenge, one that places under question the very attempt to look for any morally sufficient reasons God might have for creating a world littered with evil. This ‘anti-theodical’ view argues that theists (and non-theists) ought to reject, primarily for moral reasons, the (...) project of ‘justifying the ways of God to men’. Unfortunately, this view has not received the serious attention it deserves, particularly in analytic philosophy of religion. Taking my cues from such anti-theodicists as Kenneth Surin, D.Z. Phillips and Dostoyevsky’s Ivan Karamazov, I defend several reasons for holding that the way of thinking about God and evil enshrined in theodical discourse can only add to the world’s evils, not remove or illuminate them. (shrink)

This paper examines two cosmological models of quantum gravity to investigate the foundational and conceptual issues arising from quantum treatments of the big bang. While the classical singularity is erased, the quantum evolution that replaces it may not correspond to classical spacetime: it may instead be a non-spatiotemporal region, which somehow transitions to a spatiotemporal state. The different kinds of transition involved are partially characterized, the concept of a physical transition without time is investigated, and the problem of empirical incoherence (...) for regions without spacetime is discussed. (shrink)

Beauty is an important part of our lives. Ugliness too. It is no surprise then that philosophers since antiquity have been interested in our experiences of and judgments about beauty and ugliness. They have tried to understand the nature of these experiences and judgments, and they have also wanted to know whether these experiences and judgments were legitimate. Both these projects took a sharpened form in the twentieth century, when this part of our lives came under a sustained attack in (...) both European and American intellectual circles. Much of the discourse about beauty since the Eighteenth century had deployed a notion of the ‘aesthetic’, and so that notion in particular came in for criticism. This disdain for the aesthetic may have roots in a broader cultural Puritanism, which fears the connection between the aesthetic and pleasure. Even to suggest, in the recent climate, that an artwork might be good because it is pleasurable, as opposed to cognitively, morally or politically beneficial, is to court derision. The twentieth century has not been kind to the notions of beauty or the aesthetic. Nevertheless, some thinkers — philosophers, as well as others in the study of particular arts — have persisted in thinking about beauty and the aesthetic in a traditional way. In the first part of this essay, I look at the particular rich account of judgments of beauty given to us by Immanuel Kant. The notion of a ‘judgment of taste’ is central to Kant's account and also to virtually everyone working in traditional aesthetics; so I begin by examining Kant's characterisation of the judgment of taste. In the second part, I look at the issues that twentieth century thinkers have raised. I end by drawing on Kant's accout of the judgement of taste to consider whether the notion of the aesthetic is viable. (shrink)

Weyl symmetry of the classical bosonic string Lagrangian is broken by quantization, with profound consequences described here. Reimposing symmetry requires that the background space-time satisfy the equations of general relativity: general relativity, hence classical space-time as we know it, arises from string theory. We investigate the logical role of Weyl symmetry in this explanation of general relativity: it is not an independent physical postulate but required in quantum string theory, so from a certain point of view it plays only a (...) formal role in the explanation. (shrink)

Hyman (1999, 2006) argues that knowledge is best conceived as a kind of ability: S knows that p iff S can φ for the reason that p. Hyman motivates this thesis by appealing to Gettier cases. I argue that it is counterexampled by a certain kind of Gettier case where the fact that p is a cause of the subject’s belief that p. One can φ for the reason that p even if one does not know that p. So knowledge (...) is not best conceived as an ability of this kind. (shrink)

Recently it has been increasingly popular to argue that knowledge is the norm of belief. I present an argument against this view. The argument trades on the epistemic situation of the subject in the bad case. Notably, unlike with other superficially similar arguments against knowledge norms, knowledge normers preferred strategy of appealing to the distinction between permissibility and excusability cannot help them to rebut this argument.

Could spacetime be derived rather than fundamental? The question is pressing because attempts to quantize gravity have led to theories in which (arguably) there are either no, or only extremely thin, spacetime structures. Moreover, recent proposals for the interpretation of quantum mechanics have suggested that 3-dimensional space may be an ‘appearance’ derived from the 3N-dimensional space in which an N-particle wavefunction lives (cross- reference). In fact, I will largely assume a positive answer, and investigate how it could be; in particular, (...) I want to explicate the role of philosophy in producing a satisfactory explanation of spacetime, providing a roadmap for philosophical engagement with quantum gravity. (shrink)

Anthony Brueckner, in a recent article, proffers ‘a new way of thinking about Bostrom's Simulation Argument’ . His comments, however, misconstrue the argument; and some words of explanation are in order.The Simulation Argument purports to show, given some plausible assumptions, that at least one of three propositions is true . Roughly stated, these propositions are: almost all civilizations at our current level of development go extinct before reaching technological maturity; there is a strong convergence among technologically mature civilizations such that (...) almost all of them lose interest in creating ancestor-simulations; almost all people with our sorts of experiences live in computer simulations. I also argue that conditional on you should assign a very high credence to the proposition that you live in a computer simulation. However, pace Brueckner, I do not argue that we should believe that we are in simulation. 1 In fact, I believe that we are probably not simulated. The Simulation Argument purports to show only that, as well as , at least one of – is true; but it does not tell us which one.Brueckner also writes: " It is worth noting that one reason why Bostrom thinks that the number of Sims [computer-generated minds with experiences similar to those typical of normal, embodied humans living in a Sim-free early 21 st century world] will vastly outstrip the number of humans is that Sims ‘will run their … ". (shrink)

Quantum gravity--the marriage of quantum physics with general relativity--is bound to contain deep and important lessons for the nature of physical time. Some of these lessons shall be canvassed here, particularly as they arise from quantum general relativity and string theory and related approaches. Of particular interest is the question of which of the intuitive aspects of time will turn out to be fundamental, and which 'emergent' in some sense.

Through hearing we learn about source events: events in which objects move or interact so that they vibrate and produce sound waves, such as when they roll, collide, or scrape together. It is often claimed that we do not simply hear sounds and infer what event caused them, but hear source events themselves, through hearing sounds. Here I investigate how the idea that we hear source events should be understood, with a focus on how hearing an event relates to hearing (...) the objects involved in that event. I argue that whereas we see events such as rollings and collisions by seeing objects move through space, this cannot be how we hear them, and go on to examine two other possible models. On the first, we hear events but not their participant objects. On the second, to hear an event is to hear the appearance of an object to change. I argue that neither is satisfactory and endorse a third option: to hear a source event is to hear an object as extending through time. (shrink)

I argue that evidentialism should be rejected because it cannot be reconciled with empirical work on bias in cognitive and social psychology.

Metaphysics-—the enquiry into the constitution of reality-seems like the very crown of philosophy. What could be more exciting, more important, and more substantive than the pursuit of such a discipline? The majority of philosophers have been content to assume that metaphysics is a viable enterprise; they have held various metaphysical views and engaged in metaphysical arguments. But there has always been a small but persistent maverick minority of philosophers who have cast aspersions on the whole undertaking. Metaphysics, they tell us, (...) cannot be what it seems. There is something desperately wrong at the heart of the discipline. The jewel is a fake; it is in fact worthless glass. Philosophers make a lot of noise about metaphysics, but perhaps there are really no genuine metaphysical issues—only a lot of bogus hot air. Perhaps metaphysics is a meaningless tale told by idiot philosophers—full of sound and fury, signifying nothing. These pessimistic philosophers may have been few, but they rank among their numbers no less than Wittgenstein, the positivists, and perhaps Kant. So the attitude is to be taken seriously. (shrink)

The quantum gravity program seeks a theory that handles quantum matter fields and gravity consistently. But is such a theory really required and must it involve quantizing the gravitational field? We give reasons for a positive answer to the first question, but dispute a widespread contention that it is inconsistent for the gravitational field to be classical while matter is quantum. In particular, we show how a popular argument (Eppley and Hannah 1997) falls short of a no-go theorem, and discuss (...) possible counterexamples. Important issues in the foundations of physics are shown to bear crucially on all these considerations. (shrink)

I argue that it is epistemically permissible to believe that P when it is epistemically rational to believe that P. Unlike previous defenses of this claim, this argument is not vulnerable to the claim that permissibility is being confused with excusability.

In sum, the non-cognitivist account of motivation is far from unproblematic. The non-cognitivist has trouble telling us what moral attitudes are in a way that is consistent with the phenomenon of variable motivation. Given that the cognitivist has an easy explanation of variable motivation, it seems that cognitivism is preferable to non-cognitivism on the score of motivation, which is a reversal of the way the issue is usually perceived.

I argue that people do not and cannot have religious experiences that are perceptual experiences with theological content and that provide some justification for the belief in God. I discuss William Alston's resourceful defence of this idea. My strategy is to say that religious perception would either have to be by means of one of the ordinary five senses or else by means of some special sixth religious sense. In either case insoluble epistemological problems arise. The problem is with perceiving (...) God as God, which we need to do if reasons to believe in God are to be generated. To do so, we would have to perceive the instantiation of His essential properties – being all-knowing, all-powerful, and all-good. But perceiving the instantiation of these properties of God, even by some special sixth religious sense, is impossible. Hence, God cannot be perceived either by the ordinary five senses or by a sixth religious sense. Religious perceptual experiences are a myth. (Published Online February 17 2004). (shrink)

Recently, many historians of science have chosen to present their historical narratives from the ‘actors’-eye view’. Scientific knowledge not available within the actors’ culture is not permitted to do explanatory work. Proponents of the Sociology of Scientific Knowledge purport to ground this historiography on epistemological relativism. I argue that they are making an unnecessary mistake: unnecessary because the historiographical genre in question can be defended on aesthetic and didactic grounds; and a mistake because the argument from relativism is in any (...) case incoherent.The argument of the present article is self-contained, but steers clear of metaphysical debates in the philosophy of science. To allay fears of hidden assumptions, the sequel, to be published in the following issue, will consider SSK’s prospects of succour from scientific realism, instrumentalism, and a metaphysical system of Bruno Latour’s own devising. (shrink)

I shall discuss several related issues about beauty. These are: (1) The place of beauty among other aesthetic properties. (2) The general principle of aesthetic supervenience. (3) The problem of aesthetic relevance. (4) The distinction between free and dependent beauty. (5) The primacy of our appreciation of free beauty over our appreciation of dependent beauty. (6) Personal beauty as a species of beauty. (7) The metaphysics of beauty.

This article proposes that a general theory of assessment of historical testimony should do justice to the long tradition of adjudication in accordance with maxims of reliability and competence. I argue that an explanatory genealogical theory (along lines first adumbrated by Charles Seignobos) satisfies this condition, and that it has further notable virtues: respect for the strengths of rival theories, regard for the links between adjudication of testimony and other basic procedures of historical inquiry, and the promise of profitable lines (...) of investigation. (shrink)

This paper investigates the mathematical representation of time in physics. In existing theories time is represented by the real numbers, hence their formal proper- ties represent properties of time: these are surveyed. The central question of the paper is whether the existing representation of time is adequate, or whether it can or should be supplemented: especially, do we need a physics incorporating some kind of ‘dynamical passage’ of time? The paper argues that the existing mathematical framework is resistant to such (...) changes, and might have to be rejected by anyone seeking a physics of passage. Then it rebuts two common arguments for incorporating passage into physics, especially the claim that it is an element of experience. Finally the paper investigates whether, as has been claimed, ‘causal set theory’ provides a physics of passage. (shrink)

It is widely thought that moral obligations are necessarily guidance giving. This supposed fact has been put to service in defence of the ‘ought-implies-can’ principle according to which one cannot be morally obligated to do the impossible, since impossible-to-satisfy obligations would not give guidance. It is argued here that the supposed fact is no such thing; moral obligations are not necessarily guiding giving, and so the ‘guidance argument’ for ought-implies-can fails. This is the result of no non-trivial condition being ‘luminous’.

This is the introduction to the special issue of Studies in the History and Philosophy of Modern Physics on the emergence of spacetime in quantum theories of spacetime.

Heikki Patomäki claims, in ‘After Critical Realism?’, that Roy Bhaskar's early critical realism is inadequate to the contemporary natural and social sciences. He claims that Bhaskar defends anthropomorphic conceptions of causality; fails to recognise real change; and fails to underlabour for futures studies. These claims are based on a series of misunderstandings, notably about the nature and implications of underlabouring. Underlabouring is discussed in terms of the disclosure and transformation of the deep categorial structures of science and theory.

§1.1 What m otivated the perpetrators of the holocaust? Christopher Browning and Daniel Goldhagen differ in their analysis of Reserve Police Battalion 101 (Browning 1992, Goldhagen 1996). The battalion consisted of around 500 ‘ordinary’ Germ ans who, during the period 1942-44, killed around 40,000 Jews and who deported as m any to the death cam ps. Browning and Goldhagen differ over the m otivation wit h which the m en killed. I want to com m ent on a central aspect (...) of this debate. (shrink)

The quantum gravity program seeks a theory that handles quantum matter fields and gravity consistently. But is such a theory really required and must it involve quantizing the gravitational field? We give reasons for a positive answer to the first question, but dispute a widespread contention that it is inconsistent for the gravitational field to be classical while matter is quantum. In particular, we show how a popular argument falls short of a no-go theorem, and discuss possible counterexamples. Important issues (...) in the foundations of physics are shown to bear crucially on all these considerations. (shrink)

Philosophers have often wanted to state a principled way of demarcating empirical from non-empirical thought. This was a major concern of the Vienna Circle. In my view, this is an important intellectual project. Although it is not so common now to address the issue directly, it hovers in the background of many discussions. Non-empirical thought comes in different kinds. Perhaps some is a priori. Common candidates are mathematical, logical, modal and moral thought. Some non-empirical thought might be non-cognitive. Common candidates (...) are moral, aesthetic and religious thought. Or some non-empirical thought might be pseudo-empirical. Common candidates are astrological, theistic, Marxist or psychoanalytic thought; such thought masquerades as empirical, but in fact is not. These are all ways that thought can fail to be empirical. Here I shall focus for the most part on the case of morality, where there has been a lively debate about the empirical status of moral thought. I shall probe the prospects for a demarcation principle that can be used to decide whether or not moral thought is empirical. Some philosophers have recently presented what seems like a compelling case for thinking that moral thought is empirical, and so engaging with their arguments will raise the issue of what the empirical/nonempirical distinction amounts to, and also the issue of how to tell which forms of thought are empirical and which are not. (shrink)

It is often argued that the requirement that moral obligations be ‘action guiding’ motivates the claim that one can be obligated to ϕ only if one can ϕ. I argue that even on its most plausible interpretation, this argument fails, since the reasoning behind it leads to the absurd conclusion that one is permitted to ϕ if one cannot ϕ.

This commentary focuses on three issues raised by Gigerenzer, Todd, and the ABC Research Group (1999). First, I stress the need for further experimental evidence to determine which heuristics people use in cognitive judgment tasks. Second, I question the scope of cognitive models based on simple heuristics, arguing that many aspects of cognition are too sophisticated to be modeled in this way. Third, I note the complementary role that rational explanation can play to Gigenerenzer et al.'s “ecological” analysis of why (...) heuristics succeed. (shrink)

This book examines the introduction of Marxist philosophy to China from the early 1920s to the mid 1940s. It does this through an examination of the philosophical activities and writings of four Chinese Marxist philosophers central to this process. These are Qu Qiubai, Ai Siqi, Li Da and Mao Zedong. The book sets the philosophical writings of these philosophers in the context of the development of Marxist philosophy internationally, and examines particularly the influence on these philosophers of Soviet Marxist philosophy. (...) It argues that these Chinese Marxist philosophers’ interpretations of Marxist philosophy were quite orthodox when judged by the standards of contemporary Soviet Marxism. The book explores core themes in Marxist philosophy in China, including the dilemma of determinism, and investigates the way in which these Chinese Marxist philosophers sought a formula for the ‘Sinification’ of Marxist philosophy that both retained the universal dimensions of Marxism and allowed its application to the Chinese context. The book concludes with analysis of the role of the Yanan New Philosophy Association in developing from Soviet Marxist philosophy the philosophical dimension of Mao Zedong Thought, the official ideology of the Chinese Communist Party after 1945. (shrink)

§1. How much do we have to know about what we evaluate? Many aestheticians say that all or most aesthetic evaluations of artworks and natural things require that we know not just about its immediately perceivable aspects but also about its history or deeper nature or wider role. I agree that quite a lot of aesthetic evaluation is like this. But I also think that much is not. Much of our aesthetic life is a matter of a relatively uninformed aesthetic (...) appreciation of what is immediately given in our perceptual experience of a thing, where that appreciation and experience is not informed by knowledge of its history or deeper nature or wider role. Much appreciation is relatively innocent. I disagree with those who deny the actuality or validity of this kind of appreciation. (shrink)

Why is our knowledge of the past so much more ‘expansive’ (to pick a suitably vague term) than our knowledge of the future, and what is the best way to capture the difference(s) (i.e., in what sense is knowledge of the past more ‘expansive’)? One could reasonably approach these questions by giving necessary conditions for different kinds of knowledge, and showing how some were satisfied by certain propositions about the past, and not by corresponding propositions about the future. I take (...) it that such is the approach of Chapter 6 of Time and Chance (T&C). Here’s another such a proposal, similar to that of, but significantly different from T&C; my purpose in this section is to highlight the differences, by showing how this account fails. (shrink)