This essay focuses on a recently prominent notion of ground which is distinctive for how it links metaphysics to explanation. Ground is supposed to serve both as the common factor in diverse in virtue of questions as well as the structuring relation in the project of explaining how some phenomena are “built” from more fundamental phenomena. My aim is to provide an opinionated synopsis of this notion of ground without engaging with others. Ground, so understood, generally resists illumination by appeal (...) to more familiar models of explanation. Nevertheless, its distinctive explanatory and metaphysical aspects guide us on characterizing its explanatory logic and its metaphysical features. Some issues concerning the meta-question of what grounds ground are explored, as well as some recent skeptical challenges to ground. (shrink)

I defend (metaphysical) ground against recent, unanswered objections aiming to dismiss it from serious philosophical inquiry. Interest in ground stems from its role in the venerable metaphysical project of identifying which facts hold in virtue of others. Recent work on ground focuses on regimenting it. But many reject ground itself, seeing regimentation as yet another misguided attempt to regiment a bad idea (like phlogiston or astrology). I defend ground directly against objections that it is confused, incoherent, or fruitless. This vindicates (...) the very attempt to regiment ground. It also refocuses our attention on the genuine open questions about ground and away from the distracting, unpersuasive reasons for dismissing them. (shrink)

A commonly held view is that a central aim of metaphysics is to give a fundamental account of reality which refers only to the fundamental entities. But a puzzle arises. It is at least a working hypothesis for those pursuing the aim that, first, there must be fundamental entities. But, second, it also seems possible that the world has no foundation, with each entity depending on others. These two claims are inconsistent with the widely held third claim that the fundamental (...) just is the foundational. It is tempting to resolve the puzzle by rejecting the first or second claim, perhaps because it is obscure how the third claim might plausibly be challenged. But I develop a new analysis of fundamentality which challenges the third claim by allowing for an entity to be fundamental without being foundational. The analysis, roughly, is that an entity is fundamental just in case not all facts about it are grounded in facts about other entities. The possibility of fundamentality without foundations not only provides for a novel resolution to the puzzle, but has applications to some live debates: for example, it undermines Jonathan Schaffer's modal argument for priority monism. (shrink)

Interest surges in a distinctively metaphysical notion of ground. But a Schism has emerged between Orthodoxy’s view of ground as inducing a strict partial order structure on reality and Heresy’s rejection of this view. What’s at stake is the structure of reality (for proponents of ground), or even ground itself (for those who think this Schism casts doubt upon its coherence). I defend Orthodoxy against Heresy.

There has been much recent interest in a distinctively metaphysical kind of determinative explanation: ground. This paper concerns various skeptical challenges to ground’s relevance to metaphysics, such as that it is an empty posit, that the work it is supposed to do is appropriated by other notions, and that it is inapt for specific issues it should serve. I argue against these challenges. My strategy is both critical and constructive. Critical because I argue that versions of these challenges raised by (...) Elizabeth Barnes, Kathrin Koslicki, Mari Mikkola, and Jessica Wilson are not persuasive. Constructive because we may nevertheless learn from them new work for ground. (shrink)

A collection of 37 essays surveying the state of the art on metaphysical ground. -/- Essay authors are: Fatema Amijee, Ricki Bliss, Amanda Bryant, Margaret Cameron, Phil Corkum, Fabrice Correia, Louis deRosset, Scott Dixon, Tom Donaldson, Nina Emery, Kit Fine, Martin Glazier, Kathrin Koslicki, David Mark Kovacs, Stephan Krämer, Stephanie Leary, Stephan Leuenberger, Jon Litland, Marko Malink, Michaela McSweeney, Kevin Mulligan, Alyssa Ney, Asya Passinsky, Francesca Poggiolesi, Kevin Richardson, Stefan Roski, Noel Saenz, Benjamin Schnieder, Erica Shumener, Alexander Skiles, Olla Solomyak, (...) Tuomas Tahko, Naomi Thompson, Kelly Trogdon, Jennifer Wang, Tobias Wilsch, and Justin Zylstra. (shrink)

This paper explores the prospects of combining two views. The first view is metaphysical rationalism : all things have an explanation. The second view is metaphysical essentialism: there are real essences. The exploration is motivated by a conflict between the views. Metaphysical essentialism posits facts about essences. Metaphysical rationalism demands explanations for all facts. But facts about essences appear to resist explanation. I consider two solutions to the conflict. Exemption solutions attempt to exempt facts about essences from the demand for (...) explanation. Explanation solutions attempt to explain facts about essences. I argue that exemption solutions are less promising than explanation solutions. I then consider how explanation solutions might be developed. I suggest that a “generative” approach is most promising. I tentatively conclude that the prospects for combining metaphysical rationalism and metaphysical essentialism turn on the viability of a generative approach. This sets the agenda for defending the combination as well as the more general project of explaining essences. (shrink)

This paper raises a problem for the pair of views that universals are immanent in their instantiations and that these instantiations, or states of affairs, are somehow constructed from the instantiated universals. It is argued that the pair is inconsistent. The first view implies that universals are prior to states of affairs, whereas the second view implies that states of affairs are prior to universals. This paper does not attempt to solve this problem, but rather to formulate it precisely. That (...) promises to illuminate how to solve the problem if it can be solved, or why it cannot be solved if it is unsolvable. (shrink)

This paper concerns a distinction between circumstantial truths that hold because of the circumstances and acircumstantial truths that hold regardless of, or transcend, the circumstances. Previous discussions of the distinction tended to focus on its applications, such as to modality, logical truth, and essence. This paper focuses on developing the distinction largely, but not entirely, in abstraction from its potential applications. As such, the paper’s main contribution is to further clarify the distinction itself. An indirect contribution is to help guide (...) its future applications. (shrink)

The social world contains institutions, groups, objects, and more. This essay explores a puzzle about the essences of social items. There is widespread consensus against social essences because of problematic presuppositions often made about them. But it is argued that essence can be freed from these presuppositions and their problems. Even so, a puzzle still arises. In a Platonic spirit, essences in general seem detached from the world. In an Aristotelian spirit, social essences in particular seem embedded in the world. (...) The puzzle is that these inclinations are individually plausible but jointly incompatible. The essay has four aims: to clarify and refine the puzzle; to explore the puzzle's implications for essence in general and for social essences in particular; to illustrate the fruitfulness of the general distinction between detached and embedded; and to develop this distinction to sketch a novel solution to the puzzle. (shrink)

Is logic out of this world? This elusive question reveals a tension in our thinking about the basis of logic: both worldly and unworldly answers get something right and yet they conflict. My aim is to clarify the question and explore a conciliatory answer. I focus on a characterization of unworldliness in terms of ground. This allows for a distinction between proximal and distal unworldliness. That in turn reconfigures our approach to the question. It may now be taken as asking (...) for the proximal or the distal basis of logic. This helps alleviate the tension because the answer for the one needn’t conflict with a different answer for the other. I explore a case study culminating in an illustration of how a logical truth may indeed be proximally worldly but distally unworldly. I conclude by considering some potential extensions. (shrink)

Simon Evnine’s Making Objects and Events: A Hylomorphic Theory of Artifacts develops amorphic hylomorphism. I critically discuss three of its main themes. One theme is its attempt to do the work of form without forms. A second theme is the requirement that hylomorphs have ‘metabolisms at work’. A third theme is the use of artifacts as the paradigms for hylomorphs. I will raise some criticisms of each of these themes. Although the themes might at first appear disconnected, I believe the (...) third underwrites the first two. So the criticisms of the third theme also bear on the rest. (shrink)

Some believe reality is dynamic: time passes, not just in our experience of reality, but objectively, in reality itself. There are many objections to this view. I focus on the rate objection: that time passes only if it passes at the rate of 1 second per second, but that it cannot coherently pass at that rate. Existing replies to this objection do not fully engage with its motivation. My aim is to refute the rate objection. Time can coherently pass at (...) the rate of 1 second per second. This does not conclusively show that time passes, but it removes one of the main obstacles to believing that it does. (shrink)

Impostors are pseudo-problems masquerading as genuine problems. Impostors should be exposed. The problem of change appears genuine. But some, such as Hofweber ( 2009 ) and Rychter ( 2009 ), have recently denounced it as an impostor. They allege that it is mysterious how to answer the meta - problem of saying what problem it is: for even if any problem is genuinely about change per se, they argue, it is either empirical or trivially dissolved by conceptual analysis. There is (...) indeed an impostor in our midst. But it is the meta-problem of change. I defend the appearance that the problem of change is a genuine metaphysical problem about change. This vindicates philosophers’ lasting interest in it. It also illuminates what makes a problem metaphysical, how metaphysics relates to other inquiries, and how best to respond to attempts to undermine metaphysical problems. (shrink)

We describe a novel Internet-based method for building consensus and clarifying con icts in large stakeholder groups facing complex issues, and we use the method to survey and map the scienti c and organizational perspectives of the arti cial life community during the Seventh International Conference on Arti cial Life (summer 2000). The issues addressed in this survey included arti cial life’s main successes, main failures, main open scienti c questions, and main strategies for the future, as well as the (...) bene ts and pitfalls of creating a professional society for arti cial life. By illuminating the arti cial life community’s collective perspective on these issues, this survey illustrates the value of such methods of harnessing the collective intelligence of large stakeholder groups. (shrink)

An annotated bibliography for metaphysical ground.

We think about and refer to things that we’ve never perceived or experienced. This paper bears on how this could be. Someone is testimonially acquainted with something just in case the explanation of one’s ability to think de re thoughts about it essentially appeals to communication with others who already have that ability. The main motivation for the claim that testimonial acquaintance is possible is that it best explains how we can think de re about and refer to things we’ve (...) never perceived or experienced: we gain these abilities in part by communicating with those who already have them. The main point of this paper is negative: to argue that testimonial acquaintance, as we currently understand it, is impossible. Although one might take this to show that we cannot be acquainted with things we haven’t perceived or experienced, I prefer to think of it as motivation for rethinking the nature of acquaintance. (shrink)

There is a long history of cryptographic hash functions, i.e. functions mapping variable-length strings to fixed-length strings, and such functions are also expected to enjoy certain security properties. Hash functions can be effected via modular arithmetic, permutation-based schemes, chaotic mixing, and so on. Herein we introduce the notion of an artificial-life (ALife) hash function (ALHF), whereby the requisite mixing action of a good hash function is accomplished via ALife rules that give rise to complex evolution of a given system. Various (...) security tests have been run, and the results reported for examples of ALHFs. (shrink)

Essences have been assigned important but controversial explanatory roles in philosophical, scientific, and social theorizing. Is it possible for the same organism to be first a caterpillar and then a butterfly? Is it impossible for a human being to transform into an insect like Gregor Samsa does in Franz Kafka’s The Metamorphosis? Is it impossible for Lot’s wife to survive being turned into a pillar of salt? Traditionally, essences (or natures) have been thought to help answer such central questions about (...) existence, identity, persistence, and modality. These questions are not only of great philosophical interest, they also are of great interest to society at large. This Handbook surveys the state of the art on essence. Core issues about essence are discussed in 33 chapters, all of them written exclusively for this volume by leading experts. (shrink)

Aristotelian relativism about the future (as recently defended by MacFarlane ( 2003 )) claims that a prediction made on Monday, such as ‘It will rain’, can be indeterminate on Monday but determinate on Tuesday. A serious objection to this intuitively appealing view is that it cannot coherently be attested: for if it is attested on Monday, then our blindness to what the future holds precludes attesting that the prediction is determinate on Tuesday, and if it is attested on Tuesday (when, (...) suppose, it rains), then the fact that it rains precludes attesting that the prediction is indeterminate on Monday. In this paper, I focus on Moruzzi and Wright ( 2009 )’s recent development of this objection and argue that it fails. This result removes a major obstacle to defending the Aristotelian view. (shrink)

Chalmers, Manley, and Wasserman's "Metametaphysics" anthology is reviewed.

My aim is to rekindle interest in David Lewis's (1983) infamous but neglected Mixed Theory of mental states. The Mixed Theory is a mix of physicalism and functionalism designed to capture the intuitions that both Martians and abnormal human Madmen can be in pain. The Mixed Theory is widely derided. But I offer a new development of the Mixed Theory immune to its most prominent objections. In doing so, I uncover a new motivation for the Mixed Theory: its unique ability (...) to explain cases in which it is plausibly indeterminate whether something is in pain. The Mixed Theory, whether or not it is ultimately correct, at least deserves renewed attention. (shrink)

The physicalist credo is that the world is physical. But some phenomena, such as minds, morals, and mathematics, appear to be nonphysical. While an uncompromising physicalism would reject these, a conciliatory physicalism needn’t if it can account for them in terms of an underlying physical basis. Any such account must refer to the nonphysical. But won’t this unavoidable reference to the nonphysical conflict with the physicalist credo? This essay aims to clarify this problem and introduce a novel solution that relies (...) on a distinction between “circumstantial” facts that are based in the circumstances and “acircumstantial” facts that are not. This is used in two ways. First, physicalism is restricted to circumstantial facts: only they must have a physical basis that does not refer to the nonphysical. Second, facts accounting for the nonphysical are not restricted to the circumstantial: they may refer to the nonphysical if they are acircumstantial. Facts about how the physical accounts for the nonphysical therefore do not conflict with the physicalist’s credo. This provides a credible answer to what physicalism could be. (shrink)

Epistemic objectivists and epistemic subjectivists might agree that inquiry pursues epistemic virtues (truth, knowledge, reason, or rationality) while disagreeing over their objectivity. Objectivists will evaluate this disagreement in terms of the epistemic virtues objectively construed, while subjectivists will not. This raises a rhetorical problem: objectivists will fault subjectivism for lacking some objective epistemic virtue, whereas subjectivists, by rejecting objectivity, won’t see this as a fault. My goal is to end this impasse by offering a new solution to the rhetorical problem. (...) My strategy is to identify a common-ground virtue valuable to objectivists and subjectivists but unavailable to subjectivism. The virtue is usefulness. Subjectivism can be useful only if it relies upon the very objective epistemic virtues it rejects; so it cannot be useful. Whether or not subjectivism has any objective epistemic virtues, it may be rejected as pointless. (shrink)