Online research in philosophy

Over the last thirty years there have been a number of attempts to analyse the distinction between intrinsic and extrinsic properties in terms of the facts about naturalness. This article discusses the three most influential of these attempts, each of which involve David Lewis. These are Lewis's 1983 analysis, his 1986 analysis, and his joint 1998 analysis with Rae Langton.

An intrinsic property is roughly a property things have in virtue of how they are, as opposed to how they are related to things outside of them. This paper argues that it is not possible to give a definition of 'intrinsic' that involves only logical, modal and mereological notions, and does not depend on any special assumptions about either properties or possible worlds.

In their paper “Defining ‘Intrinsic’” Rae Langton and David Lewis propose a definition of intrinsicality in terms of modality and naturalness. Their key idea, drawing on earlier work by Jaegwon Kim, was that an intrinsic property is one that is independent of accompaniment, which is to say that P is intrinsic iff the following four conditions are all met: 1. It is possible for a lonely object to have P. 2. It is possible for an accompanied object to have P.

A number of philosophers have recently claimed that intrinsicality can be analysed in terms of the metaphysical notion of grounding. Since grounding is a hyperintensional notion, accounts of intrinsicality in terms of grounding, unlike most other accounts, promise to be able to discriminate between necessarily coextensive properties that differ in whether they are intrinsic. They therefore promise to be compatible with popular metaphysical theories that posit necessary entities and necessary connections between wholly distinct entities, on which it is plausible that (...) there are such properties. This paper argues that this promise is illusory. It is not possible to give an analysis of intrinsicality in terms of grounding that is consistent with these theories. Given an adequate analysis should be compatible with these theories, it follows that it is not possible to analyse intrinsicality in terms of grounding. (shrink)

An intrinsic property is roughly a property something has in virtue of how it is, as opposed to how it is related to other things. More carefully, the property of being F is intrinsic iff, necessarily, for any x that is F , x is F in virtue of how it is, as opposed to how it is related to wholly distinct things, or how wholly distinct things are. An extrinsic property, on the other hand, is any property that is (...) not intrinsic. An example of an extrinsic property is the property of being an uncle. The property of being an uncle is extrinsic since, necessarily, any uncle is an uncle at least partly in virtue of how it is related to people wholly distinct from them. Examples of intrinsic properties are more controversial. It is widely held, however, that both the property of being cubical and the property of being made of tin are examples of intrinsic properties. (shrink)