Online research in philosophy

Libertarianism in all its varieties is widely taken to be vulnerable to a serious problem of present luck, inasmuch as it requires indeterminism somewhere in the causal chain leading to action. Genuine indeterminism entails luck, and lack of control over the ensuing action. Compatibilism, by contrast, is generally taken to be free of the problem of present luck, inasmuch as it does not require indeterminism in the causal chain. I argue that this view is false: compatibilism is subject to a problem of present luck. Taken by itself, the compatibilist problem with present luck is less serious than the analogous problem confronting libertarianism. However, its effects are just as devastating for the entire account of freedom: the present luck confronting compatibilism is sufficient to undermine the compatibilist response to distant – constitutive – luck.

An overview of the problem of constructing extension combinatorially from qualities cum dispositional powers. In the model recommended here, Grassmann's algebra provides the combinatorial structure while Machian elements give the content.

Sydney Shoemaker’s ‘Subset Account’ offers a new take on determinable properties and the realization relation as well as a defense of non-reductive physicalism from the problem of mental causation. At the heart of this account are the claims that (1) mental properties are determinable properties and (2) the causal powers that individuate a determinable property are a proper subset of the causal powers that individuate the determinates of that property. The second claim, however, has led to the accusation that the effects caused by the instantiation of a determinable property will also be caused by the instantiation of the determinates of that property—so instead of solving the problem of mental causation, the Subset Account ends up guaranteeing that the effects of mental properties (and all other types of determinable property) will be causally overdetermined! In this paper, I explore this objection. I argue that both sides in this debate have failed to engage the question at the heart of the objection: Given that both a determinable property and its determinates have the power to cause some effect (E), does it follow that both will actually cause E when the relevant conditions obtain? To make genuine progress towards answering this question, we need to take a serious look at the metaphysics of causation. With the debate properly reframed and issues about the metaphysics of causation front and center, I explore the question of whether the Subset Account is doomed to result in problematic causal overdetermination.

This paper proposes a causal-dispositional account of rule-following as it occurs in reasoning and intentional agency. It defends this view against Kripke’s (1982) objection to dispositional accounts of rule-following, and it proposes a solution to the problem of deviant causal chains. In the first part, I will outline the causal-dispositional approach. In the second part, I will follow Martin and Heil’s (1998) realist response to Kripke’s challenge. I will propose an account that distinguishes between two kinds of rule-conformity and two kinds of rule-following, and I will defend the realist approach against two challenges that have recently been raised by Handfield and Bird (2008). In the third part, I will turn to the problem of deviant causal chains, and I will propose a new solution that is partly based on the realist account of rule-following.

I address a question in moral metaphysics: How are conflicts between moral obligations possible? I begin by explaining why we cannot give a satisfactory answer to this question simply by positing that such conflicts are conflicts between rules, principles, or reasons. I then develop and defend the “Dispositional Account,” which posits that conflicts between moral obligations are conflicts between the manifestations of obligating dispositions (obligating powers, capacities, etc.), just as conflicts between physical forces are conflicts between the manifestations of (certain) causal dispositions (causal powers, capacities, etc.). This account combines the so-called “moral forces” interpretation of prima facie obligations with a dispositional moral metaphysic according to which the metaphysical grounds of moral obligations are not rules or laws, but rather real, irreducibly dispositional properties (or powers) of moral agents and patients. My principal aims are to offer a theoretically attractive and suitably metaphysical account of conflicts of obligation, and to show that the dispositional moral metaphysic that grounds the Dispositional Account can explain and accommodate plausible normative views that rule- and law-based alternatives cannot, as well as to answer objections that have been pressed against other accounts of moral conflict (especially Ross’s) that appeal to moral dispositions or forces.

The problem this paper deals with is the problem of how dispositional properties can have causal relevance. In particular, the paper is focused on the question of how dispositions can have causal relevance given that the categorial bases that realise them seem to be sufficient to bring about the effects that dispositions explain. I show first that this problem of exclusion has no general solution. Then, I discuss some particular cases in which dispositions are causally relevant, despite of this exclusion problem. My claim is that dispositions have causal relevance in selection or recruitment processes, when they are converted into teleological functions.

According to the subset account of realization, a property, F, is realized by another property, G, whenever F is individuated by a non-empty proper subset of the causal powers by which G is individuated (and F is not a conjunctive property of which G is a conjunct). This account is especially attractive because it seems both to explain the way in which realized properties are nothing over and above their realizers, and to provide for the causal efficacy of realized properties. It therefore seems to provide a way around the causal exclusion problem. There is reason to doubt, however, that the subset account can achieve both tasks. The problem arises when we look closely at the relation between properties and causal powers, specifically, at the idea that properties confer powers on the things that have them. If realizers are to be ontically prior to what they realize, then we must regard the conferral of powers by properties as a substantive relation of determination. This relation of conferral is at the heart of a kind of exclusion problem, analogous to the familiar causal exclusion problem. I argue that the subset account cannot adequately answer this new exclusion problem, and is for that reason ill-suited to be the backbone of a non-reductive physicalism.

Sydney Shoemaker has attempted to save mental causation by a new account of realization. As Brian McLaughlin argues convincingly, the account has to face two major problems. First, realization does not guarantee entailment. So even if mental properties are realized by physical properties, they need not be entailed by them. This is the first, rather general metaphysical problem. A second problem, which relates more directly to mental causation is that Shoemaker must appeal to some kind of proportionality as a constraint on causation in order to avoid redundant mental causation. I argue that, in addition, a “piling problem” arises, since causal powers seem to be bestowed twice. Then, I try to sketch an alternative view of the relation between causal powers and properties—a reductionist view—which fares better on some accounts. But it may have to face another and, perhaps, serious problem, the “problem of the natural unity of properties”. Finally, I will pose a question about the relation between causal powers and causation.

– The conjunction of three plausible theses about the nature of causal powers—that they are intrinsic, that their effects are produced mutually, and that the manifestations they are for are essential to them—leads to a problem concerning the ability of causal powers to work together to produce manifestations. I call this problem the problem of fit. Fortunately for proponents of a power-based metaphysic, the problem of fit is not insurmountable. Fit can be engineered if powers are properties whose natures are determined holistically. However, this power holism does not come without a cost, as a power-based metaphysic must be supplemented by a certain amount of additional machinery in order to avoid the problem.

Hume thought that if you believed in powers, you believed in necessary connections in nature. He was then able to argue that there were none such because anything could follow anything else. But Hume wrong-footed his opponents. A power does not necessitate its manifestations: rather, it disposes towards them in a way that is less than necessary but more than purely contingent.

In this paper a dispositional theory of causation is offered. Causes dispose towards their effects and often produce them. But a set of causes, even though they may succeed in producing an effect, cannot necessitate it since the effect could have been counteracted by some additional power. This would require a separation of our concepts of causal production and causal necessitation. The most conspicuous cases of causation are those where powers accumulate and pass a requisite threshold for an effect to occur.

We develop a model for representing powers as constituent vectors within an n-dimensional quality space, where composition of causes appears as vector addition. Even our resultant vector, however, has to be understood as having dispositional force only. This model throws new light on causal modality and cases of prevention, causation by absence and probabilistic causation.