Reductionists about dispositions must either say the natural properties are all dispositional or individuate properties hyperintensionally. Lewis stands in as an example of the sort of combination I think is incoherent: properties individuated by modal profile + categoricalism.

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This paper develops two ideas with respect to dispositional properties: (1) Adapting a suggestion of Sungho Choi, it appears the conceptual distinction between dispositional and categorical properties can be drawn in terms of susceptibility to finks and antidotes. Dispositional, but not categorical properties, are not susceptible to intrinsic finks, nor are they remediable by intrinsic antidotes. (2) If correct, this suggests the possibility that some dispositions—those which lack any causal basis—may be insusceptible to any fink or antidote. Since finks and (...) antidotes are a major obstacle to a conditional analysis of dispositions, these dispositions that are unfinkable may be successfully analysed by the conditional analysis of dispositions. This result is of importance for those who think that the fundamental properties might be dispositions which lack any distinct causal basis, because it suggests that these properties, if they exist, can be analysed by simple conditionals and that they will not be subject to ceteris paribus laws. (shrink)

D. M. Armstrong has objected that the Dispositionalist theory of laws and properties is modally inverted, for it entails that properties are constituted by relations to non-actual possibilia. I contend that, if this objection succeeds against Dispositionalism, then Armstrong's nomic necessitation relation is also modally inverted. This shows that at least one of Armstrong's reasons for preferring a nomic necessitation theory is specious.

I explore two alternative accounts of properties within an essentialist or Neo-Aristotelian framework, the Pure Powers view and the Powerful Qualities view. Both are, unfortunately, easily misunderstood, and so I attempt to clarify precisely what the views are. I raise worries for the Pure Powers view, primarily that it cannot account for the qualitative nature of our phenomenal experience. I then offer a restatement of the Powerful Qualities view, which I shall call the Truthmaker view, in order to avoid some (...) common misconceptions, and I defend it against objections. (shrink)

Many philosophers hold that all dispositions must have independent causal bases. I challenge this view, hence defending the possibility of bare dispositions. In part 1, I explain more fully what I mean by "disposition," "causal basis," and "bare disposition." In part 2, I consider the claim that the concept of a disposition entails that dispositions are not bare. In part 3, I consider arguments, due to Prior, Pargetter, and Jackson, that dispositions necessarily have distinct causal bases. In part 4, I (...) consider arguments by Smith and Stoljar that there can't be bare dispositions because they would make for unwelcome "barely true" counterfactuals. In the end, I find no reason to deny the possibility of bare dispositions. (shrink)

This book advocates dispositional essentialism, the view that natural properties have dispositional essences.1 So, for example, the essence of the property of being negatively charged is to be disposed to attract positively charged objects. From this fact it follows that it is a law that all negatively charged objects will attract positively 10 charged objects; and indeed that this law is metaphysically necessary. Since the identity of the property of being negatively charged is determined by its being related in a (...) certain way to the property of being positively charged, in any world in which these properties exist they must be related so that all negatively charged objects attract positively charged objects. 15 Bird opposes his dispositional essentialism to the view that properties are categorical in nature, with their identities grounded in quiddities that are not exhausted by their relations to other properties. The main exponents of this view are D.M. Armstrong and David Lewis. They take the laws of nature to be contingent though they entertain very different views about their nature: Armstrong is a necessitarian 20 about laws, taking them to be relations of nomic necessitation between universals, while Lewis is a Humean about laws who takes them to be a special kind of regularity. The book is a sustained defence of the dispositional essentialist conception of properties and laws against the competing conceptions espoused by Armstrong and Lewis. One rough way to characterize the difference between these conceptions is to say that 25 the categoricalist sees properties as passive and inert with the laws of nature being fixed independently of the nature of properties whereas, in contrast, the dispositional essentialist sees properties as active potencies from which the laws of nature automatically spring. A slightly more tendentious way to express the difference is to say, as Bird does, that the categoricalist views embrace the Humean doctrine that there are no 30 necessary connexions in nature, while the dispositional essentialist view, on the other hand, repudiates this doctrine.. (shrink)

The role of dispositions in the physical world is considered. It is shown that not only can classical physics be reasonably construed as the discovery of real dispositions, but also quantum physics. This approach moreover allows a realistic understanding of quantum processes.

If one proposes to analyze dispositions by means of statements involving only the 'if-then' of material implication--that is, for example, to define 'x is soluble' by means of 'x is in water ⊃ x dissolves'--then one faces the problem first raised by Carnap, the match which is never put in water and which therefore turns out to be not only soluble but also both soluble and insoluble. I have elsewhere argued that if one refers to appropriate laws, then one can (...) provide an account of disposition predication that solves Carnap's problem while requiring no sense of 'if-then' other than that of material implication. Harre and Madden have argued that a variant of this proposal--one in which the relevant law is restricted to one that relates the disposition to internal structures--is more adequate. It is argued that the proposal of Harre and Madden is in fact not adequate. It leads to an implausible infinite regress of dispositions and ever finer internal structures, which Harre and Madden avoid only by introducing "Parmenidean individuals." The examples they give turn out to involve dispositions not grounded in internal structures, and so support our analysis; while the explicit description of such individuals by Harre and Madden involves the incoherent idea that two individuals can share all categorical properties while differing in their dispositions. The position of Harre and Madden thus turns out to be equivalent to ours or to be incoherent. (shrink)