It is widely believed that shapes are intrinsic properties. But this claim is hard to defend. I survey all known theories of shape properties, and argue that each theory is either incompatible with the claim that shapes are intrinsic, or can be shown to be false.

In ‘Finkish Dispositions’1 David Lewis proposes an analysis of dispositions which improves on the simple conditional analysis. In this paper I show that Lewis’ analysis still fails. I also argue that repairs are of no avail, and suggest why this is so.

The central question addressed in this dissertation is, What, in the most general terms, is required for an object to have a disposition? In the formal mode, this is just the question, What are the truth conditions of disposition ascriptions, sentences of the form "N is disposed to M when C"? The dissertation begins by criticizing existing answers to this question, answers which consist in accounts of disposition ascriptions according to which they entail conditionals of one form or another. By (...) developing examples due to C. B. Martin, Mark Johnston and others, it is argued that no conditional account of disposition ascriptions can be correct. Instead, a "Habitual Account" of disposition ascriptions is defended: an ascription "N is disposed to M when C" is true just in case N has some intrinsic property in virtue of which N Ms when C. This account is shown both to escape the criticisms levelled against conditional accounts, and to have independently persuasive motivation. ;Essential to the Habitual Account of disposition ascriptions is that the sentences that it makes use of, so-called "habitual sentences" of the form "N Ms when C," are not themselves to he understood as conditionals. How they are to be understood has been a matter of some debate in the recent semantics literature, and the dissertation engages with this debate by offering a novel account of the truth conditions of habitual sentences. It is argued that these sentences should be represented as containing an implicit, unpronounced adverbial quantifier, meaning something like "normally," "generally," or "typically," and a specific account of the semantic contribution made to habitual sentences by this quantifier is supplied. ;The dissertation ends by considering an issue in the metaphysics of dispositions, arguing, contrary to widespread philosophical opinion, that some dispositions are extrinsic properties of their bearers. This conclusion is shown not only to be compatible with the Habitual Account of disposition ascriptions, but also to be explained by it. (shrink)

One of the most powerful tools in science is the analytic method, whereby we seek to understand complex systems by studying simpler sub-systems from which the complex is composed. If this method is to be successful, something about the sub-systems must remain invariant as we move from the relatively isolated conditions in which we study them, to the complex conditions in which we want to put our knowledge to use. This paper asks what this invariant could be. The paper shows (...) that the kinds of thing that a Humean might point to – behaviour, laws, and dispositions – cannot play the role required of the invariant in question. Nor, indeed, can non-Humean causal powers of the kind advocated by contemporary metaphysicians such as Ellis and Lierse. The paper suggests that the analytic method presupposes a kind of entity that does not appear in standard ontologies – a metaphysically substantial notion of causal influence. This notion of causal influence is one that Cartwright has also seen the need for, though she does not seem to take the notion as seriously as she should. (shrink)