Individual objects have potentials: paper has the potential to burn, an acorn has the potential to turn into a tree, some people have the potential to run a mile in less than four minutes. Barbara Vetter provides a systematic investigation into the metaphysics of such potentials, and an account of metaphysical modality based on them. -/- In contemporary philosophy, potentials have been recognized mostly in the form of so-called dispositions: solubility, fragility, and so on. Vetter takes dispositions as her starting (...) point, but argues for and develops a more comprehensive conception of potentiality. She shows how, with this more comprehensive conception, an account of metaphysical modality can be given that meets three crucial requirements: Extensional correctness: providing the right truth-values for statements of possibility and necessity; formal adequacy: providing the right logic for metaphysical modality; and semantic utility: providing a semantics that links ordinary modal language to the metaphysics of modality. -/- The resulting view of modality is a version of dispositionalism about modality: it takes modality to be a matter of the dispositions of individual objects. This approach has a long philosophical tradition going back to Aristotle, but has been largely neglected in contemporary philosophy. In recent years, it has become a live option again due to the rise of anti-Humean, powers-based metaphysics. The aim of Potentiality is to develop the dispositionalist view in a way that takes account of contemporary developments in metaphysics, logic, and semantics. (shrink)

Dispositions are modal properties. The standard conception of dispositions holds that each disposition is individuated by its stimulus condition(s) and its manifestation(s), and that their modality is best captured by some conditional construction that relates stimulus to manifestation as antecedent to consequent. I propose an alternative conception of dispositions: each disposition is individuated by its manifestation alone, and its modality is closest to that of possibility — a fragile vase, for instance, is one that can break easily. The view is (...) expounded in some detail and defended against the major objections. (shrink)

Abilities are in many ways central to what being an agent means, and they are appealed to in philosophical accounts of a great many different phenomena. It is often assumed that abilities are some kind of dispositional property, but it is rarely made explicit exactly which dispositional properties are our abilities. Two recent debates provide two different answers to that question: the new dispositionalism in the debate about free will, and virtue reliabilism in epistemology. This paper argues that both answers (...) fail as general accounts of abilities, and discusses the ramifications of this result. (shrink)

It is a familiar point that many ordinary dispositions are multi-track, that is, not fully and adequately characterisable by a single conditional. In this paper, I argue that both the extent and the implications of this point have been severely underestimated. First, I provide new arguments to show that every disposition whose stimulus condition is a determinable quantity must be infinitely multi-track. Secondly, I argue that this result should incline us to move away from the standard assumption that dispositions are (...) in some way importantly linked to conditionals, as presupposed by the debate about various versions of the ‘conditional analysis’ of dispositions. I introduce an alternative conception of dispositionality, which is motivated by linguistic observations about dispositional adjectives and links dispositions to possibility instead of conditionals. I argue that, because of the multi-track nature of dispositions, the possibility-based conception of dispositions is to be preferred. (shrink)

Williamsonian modal epistemology is characterized by two commitments: realism about modality, and anti-exceptionalism about our modal knowledge. Williamson’s own counterfactual-based modal epistemology is the best known implementation of WME, but not the only option that is available. I sketch and defend an alternative implementation which takes our knowledge of metaphysical modality to arise, not from knowledge of counterfactuals, but from our knowledge of ordinary possibility statements of the form ‘x can F’. I defend this view against a criticism indicated in (...) Williamson’s own work, and argue that it is better connected to the semantics of modal language. (shrink)

According to essentialism, metaphysical modality is founded in the essences of things, where the essence of a thing is roughly akin to its real definition. According to potentialism (also known as dispositionalism), metaphysical modality is founded in the potentialities of things, where a potentiality is roughly the generalized notion of a disposition. Essentialism and potentialism have much in common, but little has been written about their relation to each other. The aim of this paper is to understand better the relations (...) between essence and potentiality, on the one hand, and between essentialism and potentialism, on the other. It is argued, first, that essence and potentiality are not duals but interestingly linked by a weaker relation dubbed ‘semi-duality’; second, that given this weaker relation, essentialism and potentialism are not natural allies but rather natural competitors; and third, that the semi-duality of essence and potentiality allows the potentialist to respond to an important explanatory challenge by using essentialist resources without thereby committing to essentialism. (shrink)

According to ecological psychology, animals perceive not just the qualities of things in their environment, but their affordances: in James Gibson’s words, ’what things furnish, for good or ill’. I propose a metaphysics for affordances that fits into a contemporary anti-Humean metaphysics of powers or potentialities. The goal is to connect two debates, one in the philosophy of perception and one in metaphysics, that stand to gain much from each other.

Dispositionalists try to provide an account of modality—possibility, necessity, and the counterfactual conditional—in terms of dispositions. But there may be a tension between dispositionalist accounts of possibility on the one hand, and of counterfactuals on the other. Dispositionalists about possibility must hold that there are no impossible dispositions, i.e., dispositions with metaphysically impossible stimulus and/or manifestation conditions; dispositionalist accounts of counterfactuals, if they allow for non-vacuous counterpossibles, require that there are such impossible dispositions. I argue, first, that there are in (...) fact no impossible dispositions; and second, that the dispositionalist can nevertheless acknowledge the non-vacuity of some counterpossibles. The strategy in the second part is one of ‘divide and conquer’ that is not confined to the dispositionalist: it consists in arguing that counterpossibles, when non-vacuous, are read epistemically and are therefore outside the purview of a dispositional account. (shrink)

The standard Kratzerian analysis of modal auxiliaries, such as ‘may’ and ‘can’, takes them to be univocal and context-sensitive. Our first aim is to argue for an alternative view, on which such expressions are polysemous. Our second aim is to thereby shed light on the distinction between semantic context-sensitivity and polysemy. To achieve these aims, we examine the mechanisms of polysemy and context-sensitivity and provide criteria with which they can be held apart. We apply the criteria to modal auxiliaries and (...) show that the default hypothesis should be that they are polysemous, and not merely context-sensitive. We then respond to arguments against modal ambiguity. Finally, we show why modal polysemy has significant philosophical implications. (shrink)

This paper surveys recent "new actualist" approaches to modality that do without possible worlds and locate modality squarely in the actual world. New actualist theories include essentialism and dispositionalism about modality, each of which can come in different varieties. The commonalities and differences between these views, as well as their shared motivations, are layed out.

Modal dispositionalism is the view that possibilities are a matter of the dispositions of individual objects: it is possible that p if and only if something has a disposition for p to be the case. We raise a problem for modal dispositionalism: nothing within the theory rules out that there could be necessary, perfect masks, which make the manifestation of a disposition impossible. Unless such necessary perfect masks are ruled out, modal dispositionalism runs the risk of failing to provide a (...) sufficient condition for possibility, and indeed of engendering contradictions. But to rule them out, modal dispositionalism would have to revise a crucial tenet of the view, its localism. (shrink)

This paper explores the prospects for dispositional accounts of abilities. According to so-called new dispositionalists, an agent has the ability to Φ iff they have a disposition to Φ when trying to Φ. We show that the new dispositionalism is beset by some problems that also beset its predecessor, the conditional analysis of abilities, and bring up some further problems. We then turn to a different approach, which links abilities not to motivational states but to the notion of success, and (...) consider ways of implementing that approach. Our results suggest that there are principled disanalogies between abilities and disposition which prevent any dispositional account of abilities from succeeding. (shrink)

Metaphysicians of modality are increasingly critical of possible-worlds talk, and increasingly happy to accept irreducibly modal properties – and in particular, irreducible dispositions – in nature. The aim of this paper is to provide the beginnings of a modal semantics which uses, instead of possible-worlds talk, the resources of such an 'anti-Humean' metaphysics. One central challenge to an anti-Humean view is the context-sensitivity of modal language. I show how that challenge can be met and a systematic modal semantics provided, given (...) an independently plausible metaphysics of dispositional properties or potentialities. (shrink)

Inspired both by our ordinary understanding of the world and by reflection on science, anti-Humeanism is a growing trend in metaphysics. Anti-Humeans reject the Lewisian doctrine of Humean supervenience that the world is “just one little thing and then another”, and argue instead that dispositions, powers, or capacities provide connection and activity in nature. But how exactly are we to understand the shared commitment of this anti-Humean movement? I argue that this kind of anti-Humeanism, at its most general level, is (...) to be understood neither as a view about ontology nor about fundamentality, but rather as a specific claim about what explains what. (shrink)

My aim in this paper is to sketch, with a broad brush and in bare outlines, an approach to modal epistemology that is characterized by three distinctive features. First, the approach is agency-based: it locates the roots of our modal thought and knowledge in our experience of our own agency. Second, the approach is ambitious in that it takes the experience of certain modal properties in agency to be the sole distinctive feature of specifically modal thought and knowledge; everything that (...) we know about modality beyond the experience of agency is a matter of applying standard methods of inquiry such as deduction, induction and abductive methods for choosing between theories. Third, the account holds that modal thought and knowledge is, first and foremost, about modal properties that are sufficiently like those encountered in agency. (shrink)

Dispositionalism about modality is the view that metaphysical modality is a matter of the dispositions possessed by actual objects. In a recent paper, David Yates has raised an important worry about the formal adequacy of dispositionalism. This paper responds to Yates’s worry by developing a reply that Yates discusses briefly but dismisses as ad hoc: an appeal to a ’plenitude of powers’ including such powers as the necessarily always manifested power for 2+2\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} (...) \begin{document}$$2+2$$\end{document} to be 4. I argue that the reply is not ad hoc at all, by defending the metaphysics of dispositions that should underly it. I then argue, first, that a proper understanding of dispositions’ degrees provides us with an argument for such necessarily always manifested dispositions; second, that all the natural attempts to block that argument can be resisted without being ad hoc; and third, that pragmatic considerations explain our intuitive resistance to the ascription of necessarily always manifested dispositions. Dispositionalism can be formally adequate after all. (shrink)

The under-representation of women on boards is a heavily discussed topic—not only in Germany. Based on critical mass theory and with the help of a hand-collected panel dataset of 151 listed German firms for the years 2000–2005, we explore whether the link between gender diversity and firm performance follows a U-shape. Controlling for reversed causality, we find evidence for gender diversity to at first negatively affect firm performance and—only after a “critical mass” of about 30 % women has been reached—to (...) be associated with higher firm performance than completely male boards. Given our sample firms, the critical mass of 30 % women translates into an absolute number of about three women on the board and hence supports recent studies on a corresponding “magic number” of women in the boardroom. (shrink)

Manley and Wasserman (2008) have provided a convincing case against analyses of dispositions in terms of one conditional, and a very interesting positive proposal that links any disposition to a ‘suitable proportion’ of a particular set of precise conditionals. I focus on their positive proposal and ask just how precise those conditionals are to be. I argue that, contrary to what Manley and Wasserman imply in their paper, they must be maximally specific, describing in their antecedents complete centred worlds. This (...) suggests a natural semantics for dispositional expressions, which I briefly explore to argue that it lacks uniformity. I end by suggesting a variation on Manley and Wasserman's view which would preserve uniformity, though at the cost of some new puzzling questions. (shrink)

Alexander Bird puts forward a modest version of anti-Humeanism about the non-fundamental, by providing an argument for the existence of a certain select class of non-fundamental but sparse dispositions: those that have an evolutionary function. I argue that his argument over-generates, so much so that the sparse–abundant distinction, and with it the tenet of his anti-Humean view, becomes obsolete. I suggest an alternative way of understanding anti-Humeanism in the non-fundamental realm, one which is not concerned with the existence of sparse (...) properties but with explanatory relations. (shrink)

In this thesis, I develop a nonreductive and general conception of potentiality, and explore the prospects of a realist account of possibility based on this account of potentiality. Potentialities are properties of individual objects; they include dispositions such as fragility and abilities such as the ability to play the piano. Potentialities are individuated by their manifestation alone. In order to provide a unified account of potentialities, I argue in chapter 2 that dispositions, contrary to philosophical orthodoxy, are best understood in (...) terms only of their manifestations (as disposi- tions to ...), rather than in terms of a stimulus and a manifestation condition (as dispositions to ... if ...). Chapter 3 provides some preliminary motivation for a nonreductive and gen- eral account of potentiality, and chapter 4 develops such an account. The guiding question is how far the notion of potentiality can be extended from the initial ex- amples of familiar dispositions and abilities, and it is argued that it can be extended very far. Various features of potentialities are explored, among them extrinsicality, iterations of potentiality, and the behaviour of potentiality with regard to logical equivalence. In chapter 5, the account is set to work in providing the outlines and a defense of a potentiality-based account of possibility. The basic idea of such an account is that it is possible that p just in case some thing has a potentiality for p. The account is defended against the objection that there may not be enough potential- ities to ground all the possibilities that there are. Finally, in chapter 6, a logic of potentiality is formulated and the logic of possibility derived from it, showing that the potentiality-based account of possibility is formally adequate: it provides pos- sibility with the formal features that modal logicians have studied. I conclude that the proposed account of possibility is a promising research programme. (shrink)

Why and how have lay people participated in scientific observation? And on what terms have they collaborated with experts and professionals? We have become accustomed to the involvement of lay observers in the practice of many branches of science, including both the natural and human sciences, usually as subordinates to experts. The current surge of interest in this phenomenon, as well as in the closely related topic of how expertise has been constructed, suggests that historians of science can offer a (...) valuable contribution to these vital questions. A historical approach to lay participation allows us to better understand the making of expert-lay relations in science, and it offers a broader, long-term perspective on contemporary debates about that boundary. (shrink)

This paper responds to the contributions by Alexander Bird, Nathan Wildman, David Yates, Jennifer McKitrick, Giacomo Giannini & Matthew Tugby, and Jennifer Wang. I react to their comments on my 2015 book Potentiality: From Dispositions to Modality, and in doing so expands on some of the arguments and ideas of the book.

Field Life examines the practice of science in the field in the Great Plains and Rocky Mountains of the American West between the 1860s and the 1910s, when the railroad was the dominant form of long-distance transportation. Grounded in approaches from environmental history and the history of technology, it emphasizes the material basis of scientific fieldwork, joining together the human labor that produced knowledge with the natural world in which those practices were embedded. Four distinct modes of field practice, which (...) were shared by different field science disciplines, proliferated during this period—surveys, lay networks, quarries, and stations—and this book explores the dynamics that underpinned each of them. Using two diverse case studies to animate each mode of practice, as well as the making of the field as a place for science, Field Life combines textured analysis of specific examples of field science on the ground with wider discussion of the commonalities in the practices of a diverse array of field sciences, including the earth and physical sciences, the life and agricultural sciences, and the human sciences. By situating science in its regional environmental context, Field Life analyzes the intersection between the cosmopolitan knowledge of science and the experiential knowledge of people living in the field. Examples of field science in the Plains and Rockies range widely: geological surveys and weather observing networks, quarries to uncover dinosaur fossils and archaeological remains, and branch agricultural experiment stations and mountain biological field stations. (shrink)

ArgumentThis paper examines the field network – linking together lay observers in geographically distributed locations with a central figure who aggregated their locally produced observations into more general, regional knowledge – as a historically emergent mode of knowledge production. After discussing the significance of weather knowledge as a vital domain in which field networks have operated, it describes and analyzes how a more robust and systematized weather observing field network became established and maintained on the ground in the early twentieth (...) century. This case study, which examines two Kansas City-based local observer networks supervised by the same U.S. Weather Bureau office, demonstrates some of the key issues involved in maintaining field networks, such as the role of communications infrastructure, especially the telegraph, the procedures designed to make local observation more systematic and uniform, and the centralized, hierarchical power relations that underpinned even a low-status example of knowledge production on the periphery. (shrink)

Biological field stations proliferated in the Rocky Mountains region of the western United States during the early decades of the twentieth century. This essay examines these Rocky Mountain field stations as hybrid lab-field sites from the perspective of the field side of the dichotomy: as field sites with raised walls rather than as laboratories whose walls with the natural world have been lowered. Not only were these field stations transformed to be more like laboratories, but they were also embedded within (...) the particular regional environmental and institutional context of the Rocky Mountains. Using the University of Colorado’s Mountain Laboratory at Tolland and other contemporaneous sites as examples, this essay analyzes key features of these sites, including their location within transportation networks, buildings, equipment, personnel, scheduling, recreational and social activities, and other material and social practices on the ground. Considering both the distinctive and shared characteristics of the Rocky Mountain field stations in comparison to other types of field stations provides a more complete picture of the diversity and range of lab-field hybrid sites in the biological sciences in the early twentieth-century United States. (shrink)

Steven French proposes a vindication of “scientifically disinterested” metaphysics that leaves little room to its original ambitions. He claims that as a discipline that looks to find out truths about the world, it is untenable; and that rather, its vindication lies in its use as a “toolbox” of concepts for a philosophical discipline that does have a claim at getting us closer to truth—the philosophy of science, and more specifically of physics. I respond to both his main claims. The first (...) claim, I argue, neglects what I call “archaeological” metaphysics, which tries to impose some order on phenomena by “digging deeper” from the less to the more fundamental, or from the less to the more abstract questions. The second claim imposes a hierarchical relation between metaphysics and philosophy of science which should, I argue, be replaced with a more egalitarian picture of philosophy. (shrink)

This paper examines how board gender diversity affects corporate risk disclosure. We exploit an exogenous shock on firms’ risk environment created by the United Kingdom’s vote to leave the European Union and analyze related risk disclosure in annual reports of public firms in the UK. Using this unique setting, we mitigate concerns about omitted variables in concurrent studies. The findings suggest that board gender diversity is positively related to corporate risk disclosure. However, our results also indicate that the proportion of (...) female directors needs to reach a critical mass to impact the risk disclosure decision. Moreover, we find lower bid–ask spreads immediately after the referendum date for those firms that disclosed Brexit-related risks in their annual reports prior to the vote. Collectively, our results are consistent with board gender diversity promoting the disclosure of decision-relevant information through improved board group dynamics. (shrink)

The building of the transcontinental railroad in the US Central West in the late 1860s greatly improved access to this region and led to the expansion of scientific field work. The relationships between science and the railroad spanned a diverse spectrum, ranging from its practical advantages to more complex interactions such as the transformation of nature along railway corridors and the reciprocal exchange of favours between scientists and railway companies. The dominance of science along the railroad in the second half (...) of the nineteenth century continued into the early twentieth century, with a gradual shift to automobile travel beginning in the 1910s. By stimulating and shaping field research both on and off the railway corridor, the laying of iron tracks across the continent helped guide US science, just as it influenced so many other aspects of US life. (shrink)

In this review of Ann Whittle's book, I take a closer look at, and raise some concerns about, two crucial steps in the argument of the book. First, I consider the ‘all-in can’, the sense of ‘can’ that is relevant for freedom, and argue that it sits uneasily with Whittle’s foundation in the semantics of agentive modals. Second, I take a closer look at the notion of ‘robust control’ and its role in Whittle's argument for contextualism about moral responsibility, and (...) argue that Whittle’s own conception of control is in tension with her argument for contextualism about moral responsibility. (shrink)

Abilities, in contrast to mere dispositions, propensities, or tendencies, abilities seem to be features of agents that put the agent herself in control. But what is the distinguishing feature of abilities vis‐à‐vis other kinds of powers? Our aim in this paper is to point, in answer to this question, to a crucial feature of abilities that existing accounts have tended to neglect: their adaptivity. Adaptivity is a feature of how abilities are exercised. The main reason for its relative neglect has (...) been that most extant accounts have focused solely on whether abilities are exercised successfully in certain possible situations and have mostly understood the exercise of an ability in terms of complete successful performance. We begin by pointing out two aspects of abilities with regard to which current accounts seem (at best) incomplete: control and exercise. We then introduce adaptivity as we understand it, and end by putting it to work in developing a fuller understanding of abilities that does better than current accounts. (shrink)

ABSTRACT Even as the division between professional scientists and laypeople became sharper by the end of the nineteenth century, the collaboration of local people remained important in scientific fieldwork, especially in sciences such as vertebrate paleontology that required long‐term extractive access to research sites. In the North American West, the competition between museums and universities for the best fossil quarry sites involved negotiations with locals. The conflict over differing conceptions of the field site is vividly demonstrated through an examination of (...) one site on the High Plains of western Nebraska in the early twentieth century. This case offers a rare opportunity to see not only how professionals regarded such sites but also how the resident ranching family, the Cooks, attempted to exercise leverage over the scientific fieldwork that took place there. While the Carnegie Museum of Pittsburgh became mired in protracted conflict with the Cooks over discovery claims and the ongoing control of the site, the University of Nebraska and the American Museum of New York developed more harmonious relations with the site's resident ranching family. (shrink)

This is the third part of a „controversy“, in which I respond to comments from Vera Hoffmann-Kolss, Johannes Hübner, Boris Kment, Kathrin Koslicki, Annina Loets, and Ulrich Metschl concerning my earlier paper „Möglichkeit ohne mögliche Welten“ („possibility without possible worlds“).

Lucretia Mott is widely recognized as a moral and spiritual leader in the abolitionist and early women’s rights movements. She has been characterized as a disciple of William Lloyd Garrison, a proliferator of Mary Wollstonecraft’s ideas, and a religious promoter of human rights whose efforts were surpassed by the theoretically sophisticated and politically astute Elizabeth Cady Stanton. These portrayals paradoxically elevate Mott’s status while understating the originality of her views. This analysis examines Mott’s speeches and writings in detail and finds (...) that her unique theoretical contributions are shaped by a combination of elements: a radically anti-dogmatic worldview rooted in her progressive religious faith, an unwavering commitment to autonomy for all people, and an egalitarian conception of power. Careful study of Mott’s work reveals a compelling alternative viewpoint in the early women’s rights and abolitionist movements and provides important insight into the philosophical roots of contemporary feminism and pacifism. (shrink)

It is shown that the basic postulate of utilitarianism does not work when we must decide whether a person should be brought into existence. Utilitarianism must be supplemented by further axioms. Those proposed lead to the consequence that as far as the potential child's utility is concerned, it is morally preferable not to produce children at all. This consequence is accepted. It is still recommended when parents? utility is taken into account.