We study the question of how to decompose Hilbert space into a preferred tensor-product factorization without any pre-existing structure other than a Hamiltonian operator, in particular the case of a bipartite decomposition into "system" and "environment." Such a decomposition can be defined by looking for subsystems that exhibit quasi-classical behavior. The correct decomposition is one in which pointer states of the system are relatively robust against environmental monitoring (their entanglement with the environment does not continually and dramatically increase) and remain (...) localized around approximately-classical trajectories. We present an in-principle algorithm for finding such a decomposition by minimizing a combination of entanglement growth and internal spreading of the system. Both of these properties are related to locality in different ways. This formalism could be relevant to the emergence of spacetime from quantum entanglement. (shrink)

This paper seeks to resolve a fairly simple question in ethics: Why do seemingly reasonable people disagree about ethical problems? My paper seeks both to analyze this question and attempts to find a solution. My premise is that disagreement happens because of differences in hierarchical value ranking, or quite simply because some problems are more important to some people than others. Theories of choice, however, influenced by concepts such as "freedom of choice," conceal the hierarchical nature of our choices, leading (...) to confusion over the nature and degree of our ethical disagreements. I propose then that ethical disagreements can be reduced when we understand hierarchy as an essential element in moral choice theory. (shrink)

I defend the extremist position that the fundamental ontology of the world consists of a vector in Hilbert space evolving according to the Schrödinger equation. The laws of physics are determined solely by the energy eigenspectrum of the Hamiltonian. The structure of our observed world, including space and fields living within it, should arise as a higher-level emergent description. I sketch how this might come about, although much work remains to be done.

We have a much better understanding of physics than we do of consciousness. I consider ways in which intrinsically mental aspects of fundamental ontology might induce modifications of the known laws of physics, or whether they could be relevant to accounting for consciousness if no such modifications exist. I suggest that our current knowledge of physics should make us skeptical of hypothetical modifications of the known rules, and that without such modifications it’s hard to imagine how intrinsically mental aspects could (...) play a useful explanatory role. Draft version of a paper submitted to Journal of Consciousness Studies, special issue responding to Philip Goff’s Galileo’s Error: Foundations for a New Science of Consciousness. (shrink)

Some modern cosmological models predict the appearance of Boltzmann Brains: observers who randomly fluctuate out of a thermal bath rather than naturally evolving from a low-entropy Big Bang. A theory in which most observers are of the Boltzmann Brain type is generally thought to be unacceptable, although opinions differ. I argue that such theories are indeed unacceptable: the real problem is with fluctuations into observers who are locally identical to ordinary observers, and their existence cannot be swept under the rug (...) by a choice of probability distributions over observers. The issue is not that the existence of such observers is ruled out by data, but that the theories that predict them are cognitively unstable: they cannot simultaneously be true and justifiably believed. (shrink)

It is commonplace in discussions of modern cosmology to assert that the early universe began in a special state. Conventionally, cosmologists characterize this fine-tuning in terms of the horizon and flatness problems. I argue that the fine-tuning is real, but these problems aren't the best way to think about it: causal disconnection of separated regions isn't the real problem, and flatness isn't a problem at all. Fine-tuning is better understood in terms of a measure on the space of trajectories: given (...) reasonable conditions in the late universe, the fraction of cosmological histories that were smooth at early times is incredibly tiny. This discussion helps clarify what is required by a complete theory of cosmological initial conditions. (shrink)

Clinical ethics consultants (CECs) are not moral authorities. Standardization of CECs’ professional role does not confer upon them moral authority. Certification of particular CECs does not confer upon them moral authority (nor does it reflect such authority). Or, so we will argue. This article offers a distinctly Orthodox Christian response to those who claim that CECs—or any other academically trained bioethicist—retain moral authority (i.e., an authority to know and recommend the right course of action). This article proceeds in three parts. (...) First, we discuss recent movements toward the certification of CECs in the United States, focusing primarily on proposals and programs put forth by the American Society for Humanities and Bioethics (ASBH). Second, we outline two secular reasons to be concerned about the relevant trends toward certification. For one thing, certification is currently being advanced via political dominance, rather than gaining authority by reliance on rigorous philosophical argument or reason. For another, the trends operate on the assumption that there exists a secular, content-full, canonical, morality. There is no such morality. Next, we argue that Orthodox Christians should resist the current trends toward certification of CECs. Specifically, we unpack ways in which the ASBH’s certification program (and those like it) conflict with Orthodox claims about moral authority and the moral life more generally. We conclude that Orthodox Christians should resist the current certification trends. (shrink)

Argument that full grounds modally entail what they ground.

General discussion of grounding, including its formal features, relations to other notions, and applications.

Investigation of a puzzle concerning complete yet authorless artworks.

Cosmological models that invoke a multiverse - a collection of unobservable regions of space where conditions are very different from the region around us - are controversial, on the grounds that unobservable phenomena shouldn't play a crucial role in legitimate scientific theories. I argue that the way we evaluate multiverse models is precisely the same as the way we evaluate any other models, on the basis of abduction, Bayesian inference, and empirical success. There is no scientifically respectable way to do (...) cosmology without taking into account different possibilities for what the universe might be like outside our horizon. Multiverse theories are utterly conventionally scientific, even if evaluating them can be difficult in practice. (shrink)

Amendment of the Witmer, Butchard, and Trogdon (2005) account of intrinsic properties with the aim of neutrality between competing theories of what is fundamental.

We consider emergence from the perspective of dynamics: states of a system evolving with time. We focus on the role of a decomposition of wholes into parts, and attempt to characterize relationships between levels without reference to whether higher-level properties are “novel” or “unexpected.” We offer a classification of different varieties of emergence, with and without new ontological elements at higher levels. -/- Submitted to a volume on Real Patterns (Tyler Milhouse, ed.), to be published by MIT Press.

Grief research in philosophy agrees that one who grieves grieves over the irreversible loss of someone whom the griever loved deeply, and that someone thus factored centrally into the griever’s sense of purpose and meaning in the world. The analytic literature in general tends to focus its treatments on the paradigm case of grief as the death of a loved one. I want to restrict my account to the paradigm case because the paradigm case most persuades the mind that grief (...) is a past-directed emotion. The phenomenological move I propose will enable us to (1) respect the paradigm case of grief and a broader but still legitimate set of grief-generating states of affairs, (2) liberate grief from the view that grief is past directed or about the past, and thus (3) account for grief in a way that separates it from its closest emotion-neighbor, sorrow, without having to rely on the affective quality of those two emotions.If the passing of the beloved causes the grief but is not what the grief is about, then we can get at the nature of grief by saying its temporal orientation is in the past (the event of the passing), but its temporal meaning is the present and future—the new significance of a world with the pervasive absence that is the world without the beloved. The no-longer of grief is a no-longer oriented by a past (that which is no longer) that is referred a present and future (that which is a no-longer understood as not now as it once was). Looking at the griever’s relation to time can tell us much about the pain and the object of grief, then. As the griever puts the past before himself with a certainty about this world “henceforth,” a look at the griever’s lived sense of the fi nality of the irreversibly lost (1) liberates grief from the tendency in the literature to be reduced to a past-directed emotion, (2) accounts for grief ’s intensity, its affective force or poignancy, and thus (3) enables us to separate grief from sorrow according to its intentionalobject in light of the temporal meaning of these emotions. (shrink)

We argued in a recent issue of this journal that if abortion is restricted,1 then there are parallel obligations for parents to donate body parts to their children. The strength of this obligation to donate is proportional to the strength of the abortion restrictions. If abortion is never permissible, then a parent must always donate any organ if they are a match. If abortion is sometimes permissible and sometimes not, then organ donation is sometimes obligatory and sometimes not. Our argument (...) was based on the following ideas: (a) that a fetus has full moral status, (b) that parents have special obligations to their offspring, fetus or not, and (c) that this special obligation is to protect them. The result is the conclusion that abortion restrictivists cannot also consistently deny that organ donation should be compulsory. (shrink)

Characterization of a form of explanation involving grounding on the model of mechanistic causal explanation.

The goal of this essay is to explain how Wittgenstein's philosophy may be helpful for understanding and addressing challenges to cross-cultural communication in educational contexts. In particular, the notions of “hinge,” “intellectual distance,” and “grounds” from On Certainty will be helpful for identifying cultural differences. Wittgenstein's dialogical conception of philosophy in Philosophical Investigations will be helpful for addressing that cultural difference in conversation. While here can be no panacea to address all potential sources of confusion, Wittgenstein's philosophy has strong resources (...) that are helpful for curbing some of our human tendencies to misunderstand other people. (shrink)

The Principle of Sufficient Reason (PSR) holds that, for everything that exists or occurs or holds true, there is a reason why that is the case. I consider three possible ways of relating physics to the PSR: past states as reasons for present states, reasons why the laws of physics take the form that they do, and reasons why there is anything at all. In each case I suggest that the PSR is not the best way of thinking about how (...) and why physics works. -/- Invited reflection for The Principle of Sufficient Reason (Oxford Philosophical Concepts), Eds. F. Amijee and M. Della Rocca (forthcoming 2024). (shrink)

Some people oppose abortion on the grounds that fetuses have full moral status and thus a right to not be killed. We argue that special obligations that hold between mother and fetus also hold between parents and their children. We argue that if these special obligations necessitate the sacrifice of bodily autonomy in the case of abortion, then they also necessitate the sacrifice of bodily autonomy in the case of organ donation. If we accept the argument that it is obligatory (...) to override a woman’s bodily autonomy for the sake of an unborn child’s survival, we must continue to override the bodily autonomy of parents to ensure the survival of their living children, until the parent no longer has a special obligation to their child to the same degree as their special obligation to the fetus. And if the life of a child is truly more important than the bodily autonomy of its parents, as must be the case to force women to carry unwanted pregnancies to term, this should remain true until such a time that their children are no longer considered their responsibility. Thus, parity of reasoning suggests that policies compelling the gestation of a fetus should be accompanied by policies compelling organ donation. (shrink)

Discussion of partial grounds that aren't parts of full grounds; definition of full grounding in terms of partial grounding.

Our primary aim in this paper is to sketch a cognitive evolutionary approach for developing explanations of social change that is anchored on the psychological mechanisms underlying normative cognition and the transmission of social norms. We throw the relevant features of this approach into relief by comparing it with the self-fulfilling social expectations account developed by Bicchieri and colleagues. After describing both accounts, we argue that the two approaches are largely compatible, but that the cognitive evolutionary approach is well- suited (...) to encompass much of the social expectations view, whose focus on a narrow range of norms comes at the expense of the breadth the cognitive evolutionary approach can provide. (shrink)

The Swiss psychologist Jean Piaget contends that children below the age of 12 see no necessity for the logical law of non-contradiction. I argue this view is problematic. First of all, Piaget's dialogues with children which are considered supportive of this position are not clearly so. Secondly, Piaget underestimates the necessary nature of following the logical law of non-contradiction in everyday discourse. The mere possibility of saying something significant and informative at all presupposes that the law of non-contradiction is enforced.

Discussion of the challenge that acquaintance with the nature of experience poses to physicalism.

Response to Skiles (2009) on Trogdon (2009) on intrinsic properties and fundamentality.

It seems natural to ask why the universe exists at all. Modern physics suggests that the universe can exist all by itself as a self-contained system, without anything external to create or sustain it. But there might not be an absolute answer to why it exists. I argue that any attempt to account for the existence of something rather than nothing must ultimately bottom out in a set of brute facts; the universe simply is, without ultimate cause or explanation.

Discussion of atomistic and monistic theses about abstract reality.

Discussion of a metaphysical sense of 'inheritance' and cognate notions relevant to fundamentality.

Argument that priority monism is best understood as being a contingent thesis.

We study the conservation of energy, or lack thereof, when measurements are performed in quantum mechanics. The expectation value of the Hamiltonian of a system changes when wave functions collapse in accordance with the standard textbook treatment of quantum measurement, but one might imagine that the change in energy is compensated by the measuring apparatus or environment. We show that this is not true; the change in the energy of a state after measurement can be arbitrarily large, independent of the (...) physical measurement process. In Everettian quantum theory, while the expectation value of the Hamiltonian is conserved for the wave function of the universe, it is not constant within individual worlds. It should therefore be possible to experimentally measure violations of conservation of energy, and we suggest an experimental protocol for doing so. (shrink)

In Morality & Mathematics, Justin Clarke-Doane argues that it is hard to imagine being "a realist about, for example, the standard model of particle physics, but not about mathematics." I try to explain how that seems very possible from the perspective of a physicist. What is real is the physical world; mathematics starts from descriptions of the natural world and extrapolates from there, but that extrapolation does not imply any independent reality. -/- Submitted to an Analysis Reviews symposium on Clarke-Doane's (...) Morality & Mathematics. (shrink)

We provide a derivation of the Born Rule in the context of the Everett (Many-Worlds) approach to quantum mechanics. Our argument is based on the idea of self-locating uncertainty: in the period between the wave function branching via decoherence and an observer registering the outcome of the measurement, that observer can know the state of the universe precisely without knowing which branch they are on. We show that there is a uniquely rational way to apportion credence in such cases, which (...) leads directly to the Born Rule. Our analysis generalizes straightforwardly to cases of combined classical and quantum self-locating uncertainty, as in the cosmological multiverse. (shrink)

A large chorus of voices has grown around the claim that theistic belief is epistemically suspect since, as some cognitive scientists have hypothesized, such beliefs are a byproduct of cognitive mechanisms which evolved for rather different adaptive purposes. This paper begins with an overview of the pertinent cognitive science followed by a short discussion of some relevant epistemic concepts. Working from within a largely Williamsonian framework, we then present two different ways in which this research can be formulated into an (...) argument against theistic belief. We argue that neither version works. (shrink)

Effective Field Theory (EFT) is the successful paradigm underlying modern theoretical physics, including the "Core Theory" of the Standard Model of particle physics plus Einstein's general relativity. I will argue that EFT grants us a unique insight: each EFT model comes with a built-in specification of its domain of applicability. Hence, once a model is tested within some domain (of energies and interaction strengths), we can be confident that it will continue to be accurate within that domain. Currently, the Core (...) Theory has been tested in regimes that include all of the energy scales relevant to the physics of everyday life (biology, chemistry, technology, etc.). Therefore, we have reason to be confident that the laws of physics underlying the phenomena of everyday life are completely known. (shrink)

Defense of a psychological account of what it is for an artwork to be complete.

When surveying the scholarly literature over Wittgensteinian fideism, it is easy to get the sense that the principal interlocutors, Kai Nielsen and D.Z. Phillips, talk past one another, but finding the right words for appraising the distance between the two voices is difficult. In this paper, I seek to appreciate this intellectual distance through an exploration of the varying philosophical aims of Nielsen and Phillips, of the different intellectual imperatives that guide their respective conceptions of philosophical practice. In so doing, (...) I seek to show how a contemplative mode in philosophy may be used to appraise a philosophical dispute and the terms of disagreement. In this case, a contemplative approach to understanding the dispute would frame Nielsen’s and Phillips’ contributions against the backdrop of the ends they conceive philosophy to have. (shrink)

In May 2010, philosophers, family and friends gathered at the University of Notre Dame to celebrate the career and retirement of Alvin Plantinga, widely recognized as one of the world's leading figures in metaphysics, epistemology, and the philosophy of religion. Plantinga has earned particular respect within the community of Christian philosophers for the pivotal role that he played in the recent renewal and development of philosophy of religion and philosophical theology. Each of the essays in this volume engages with some (...) particular aspect of Plantinga's views on metaphysics, epistemology, or philosophy of religion. Contributors include Michael Bergman, Ernest Sosa, Trenton Merricks, Richard Otte, Peter VanInwagen, Thomas P. Flint, Eleonore Stump, Dean Zimmerman and Nicholas Wolterstorff. The volume also includes responses to each essay by Bas van Fraassen, Stephen Wykstra, David VanderLaan, Robin Collins, Raymond VanArragon, E. J. Coffman, Thomas Crisp, and Donald Smith. (shrink)

My modest aim in this piece is to frame and illuminate some of the issues surrounding normative motivation, rather than take a firm position on any of them. I begin by clarifying the key terms in my title of this essay, and unpacking some of the assumptions that underpin its question. I then distinguish four kinds of answers one might give. In this short essay I will not be able to properly develop and evaluate an argument for the view that (...) normative motivations are psychologically primitive, but I will have some comments about what such an argument might look like, and what it would have to show. (shrink)

Philosophers and theologians acknowledge that "fideism" is difficult to define but rarely agree on what the best characterization of the term is. In this article, I investigate the history of use of "fideism" to explore why its meaning has been so contested and thus why it has not always been helpful for resolving philosophical problems. I trace the use of the term from its origins in French theology to its current uses in philosophy and theology, concluding that "fideism" is helpful (...) in resolving philosophical problems only when philosophers scrupulously acknowledge the tradition of use that informs their understanding of the word. (shrink)

Despite the growth in research in philosophy of religion over the past several decades, recent years have seen a number of critical studies of this subfield in an effort to redirect the methods and topics of inquiry. This article argues that in addition to problems of religious parochialism described by critics such as Wesley Wildman, the subfield is facing a problem of relevance. In responding to this problem, it suggests that philosophers of religion should do three things: first, be critically (...) self-aware about their aims of inquiry; second, investigate concepts used by other philosophers, scientists, and religious studies scholars to identify and dispel confusion about religions; and third, following the model of applied ethics, work to clarify concepts and advance arguments of contemporary practical urgency. (shrink)

Being social creatures in a complex world, we do things together. We act jointly. While cooperation, in its broadest sense, can involve merely getting out of each other’s way, or refusing to deceive other people, it is also essential to human nature that it involves more active forms of collaboration and coordination (Tomasello 2009; Sterelny 2012). We collaborate with others in many ordinary activities which, though at times similar to those of other animals, take unique and diverse cultural and psychological (...) forms in human beings. But we also work closely and interactively with each other in more peculiar and flexible practices which are in distinctive ways both species-specific and culturally and historically contingent: from team sports to shared labour, from committee work to mass demonstrations, from dancing to reminiscing together about old times. (shrink)

If there is to be any progress in the debate about what sort of positive moral status Kant can give the emotions, we need a taxonomy of the terms Kant uses for these concepts. It used to be thought that Kant had little room for emotions in his ethics. In the past three decades, Marcia Baron, Paul Guyer, Barbara Herman, Nancy Sherman, Allen Wood and others have argued otherwise. Contrary to what a cursory reading of the Groundwork may indicate, Kant (...) thinks the emotions play an important role in the moral life. I want to extend the work of Baron, Guyer, Herman, Sherman and Wood in three ways. First, I will set out in a diagram Kant's taxonomy of feelings and emotions. Agreement on such a taxonomy should make it easier to evaluate debates about Kant and the emotions. Second, I will focus on a certain subclass of emotions – reason-caused affects – that have previously received little attention, even from these Kant scholars. Third, these scholars base much of their defence of Kant on his later works – especially the Metaphysics of Morals and the Anthropology – but Kant's fairly rich taxonomy of the emotions, including reason-caused affects, is clearly in place at least as early as the Critique of Judgment . I believe that the Critique of Judgment is an importantly ignored resource for understanding the moral role of the emotions for Kant. The third Critique makes positive, philosophically interesting claims about the emotions and morality. Kant emphasizes certain roles for emotions in this work that he develops to the same extent nowhere else. Nevertheless, the Critique of Judgment goes all but unmentioned by many who write on these issues. In what follows, I will defend as many of my claims as possible using the third Critique. (shrink)

Grounding-theoretic account of the notion of transparency relevant to the explanatory gap between the mental and physical.

The phenomena of call-outs and call-ins are fiercely debated. Are they mere instances of virtue signaling? Or can they actually perform social justice work? This paper gains purchase on these questions by focusing on how language users negotiate norms in speech. The authors contend that norm-enacting speech not only makes a norm salient in a context but also creates conversational conditions that motivate adherence to that norm. Recognizing this allows us to define call-outs and call-ins: the act of calling-out brings (...) with it the presupposition that its target's behavior is norm-violating, whereas the act of calling-in simply presupposes its target's willingness to revise their belief. With these definitions at hand, we evaluate whether call-outs and call-ins are suitable tools for combating social injustice. (shrink)

Disgust has been a perennial feature of art from medieval visions of hell to postmodern travesties. The purpose of this chapter is to chart various ways in which disgust functions in artworks both in terms of content and style, canvassing cases in which the content and/or style is literally disgusting in contrast to cases where the disgust serves to characterize the content, often for moral or political or broader cultural purposes.

Discussion of grounding-theoretic accounts of truthmaking in terms of the theoretical role of “catching cheaters”.

Disproof of heaven? -- Brain and gods -- The rational stance -- Reason and belief in God -- Against naturalism -- Atheism, inference, and IQ -- Atheism, autism, and intellectual humility -- Googling God -- Inference, intuition, and rationality.

Recent years have seen an increasing amount of studies of the history of the term “religion” and how it figures in conceptions of “the secular” and of cultural differences generally. A recurrent theme in these studies is that “religion” carries associations with Protestant Christianity and thus is not as universal a category as it might appear. The aim of this paper is to explore some resources in Wittgenstein’s philosophy to obtain greater clarity about the contexts of ascription of religion-status to (...) various phenomena and thus to gain perspective on claims made by scholars who investigate the genealogy of the term. While there is good reason to be circumspect about uncritical use of the term “religion” (no less in philosophizing about religions or conducting interreligious dialogue), I argue that instead of abandoning the term or proffering a critical theory of religion, investigation of ascriptions of religion will help philosophers to perceive more clearly the social dynamics that have led to some- one or thing being called religious and thus avoid equivocations that could obstruct the ends of philosophical inquiry or dialogue. (shrink)

Response to Gover (2015) on Trogdon and Livingston (2015) on artwork completion.