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26. Natural Theory / B. Natural Kinds / 5. Reference to Natural Kinds

[how language terms refer to natural kinds]

13 ideas
The names of all the types of creature were given forever by Adam [Anon (Tor)]
     Full Idea: Whatsoever Adam called any living creature, the same is its name. And Adam called all the beasts by their names, and all the fowls of the air, and all the cattle of the field.
     From: Anon (Tor) (01: Book of Genesis [c.750 BCE], 02:20)
Express natural kinds as a posteriori predicate connections, not as singular terms [Putnam, by Mackie,P]
     Full Idea: Putnam implies dispensing with the designation of natural kinds by singular terms in favour of the postulation of necessary but a posteriori connections between predicates. ...We might call this 'predicate essentialism', but not 'de re essentialism'.
     From: report of Hilary Putnam (Explanation and Reference [1973]) by Penelope Mackie - How Things Might Have Been 10.1
     A reaction: It is characteristic of modern discussion that the logical form of natural kind statements is held to be crucial, rather than an account of nature in any old ways that do the job. So do I prefer singular terms, or predicate-connections. Hm.
Natural kind stereotypes are 'strong' (obvious, like tiger) or 'weak' (obscure, like molybdenum) [Putnam]
     Full Idea: Natural kinds can be associated with 'strong' stereotypes (giving a strong picture of a typical member, like a tiger), or with 'weak' stereotypes (with no idea of a sufficient condition, such as molybdenum or elm).
     From: Hilary Putnam (Explanation and Reference [1973], II C)
"Water" is a natural kind term, but "H2O" is a description [Putnam]
     Full Idea: "Water" functions as a natural kind term, but "H2O" is a description, synonymous with an account of its atoms.
     From: Hilary Putnam (Representation and Reality [1988], §3 p.50)
The cause of a usage determines meaning, but why is the microstructure of water relevant? [Davidson]
     Full Idea: While I agree that the usual cause of the use of the word determines what it means, I do not see why sameness of microstructure is necessarily the relevant similarity that determines my reference of the word 'water'.
     From: Donald Davidson (Epistemology Externalized [1990], p.198)
     A reaction: This is a problem for essentialists who build their views on semantic considerations. But the stability of what causes 'water' thoughts is the microstructure of water. However, that is an explantion of meaning, not a definition of it.
The properties that fix reference are contingent, the properties involving meaning are necessary [Kripke]
     Full Idea: Bear in mind the contrast between the a priori but perhaps contingent properties carried with a natural kind term, given by the way its reference was fixed, and the analytic (and hence necessary) properties a term may carry, given by its meaning.
     From: Saul A. Kripke (Naming and Necessity lectures [1970], Lecture 3)
     A reaction: The second half of this is the 'new essentialism'. Complex. We need to distinguish 'reference' from 'definition'. The 'analytic properties' seem to be the definition, but we sometimes change our definitions (e.g. of units of time).
Terms for natural kinds are very close to proper names [Kripke]
     Full Idea: According to the view I advocate, terms for natural kinds are much closer to proper names than is ordinarily supposed. …'Common name' is appropriate for species …and also for certain mass terms such as 'gold' and 'water'.
     From: Saul A. Kripke (Naming and Necessity lectures [1970], Lecture 3)
Nothing in the direct theory of reference blocks anti-essentialism; water structure might have been different [Salmon,N]
     Full Idea: There seems to be nothing in the theory of direct reference to block the anti-essentialist assertion that the substance water might have been the very same entity and yet have had a different chemical structure.
     From: Nathan Salmon (Reference and Essence (1st edn) [1981], 6.23.1)
     A reaction: Indeed, water could be continuously changing its inner structure, while retaining the surface appearance that gets baptised as 'water'. We make the reasonable empirical assumption, though, that structure-change implies surface-change.
Nouns seem to invoke stable kinds more than predicates do [Gelman]
     Full Idea: Children judged personal characteristics as more stable when they were referred to by a noun ('She is a carrot eater') than by a verbal predicate ('She eats carrots whenever she can')
     From: Susan A. Gelman (The Essential Child [2003], 08 'Naming')
     A reaction: This fits with my feeling that 'labels' are the basis of how the mind works. The noun invokes a genuine category of thing, where a predicate attaches to some preselected category ('she'). Gelman says names encourage inductions.
Jadeite and nephrite are superficially identical, but have different composition [Bird]
     Full Idea: There might be more than one natural kind that shares the same superficial features, …jade, for example, has two forms, jadeite and nephrite, which are similar in superficial properties, but have different chemical composition and structure.
     From: Alexander Bird (Philosophy of Science [1998], Ch.3)
     A reaction: It might be questioned whether jadeite and nephrite really are natural kinds, either together or separately.
Nominal essence of a natural kind is the features that make it fit its name [Bird]
     Full Idea: The nominal essence of a natural kind K consists of those features a thing must have to deserve the name 'a K' by virtue of the meaning of that name.
     From: Alexander Bird (Philosophy of Science [1998], Ch.3)
     A reaction: Some people think 'nominal essence' is the only essence there is, which would make it relative to human languages. The rival view is that there are 'real essences'. I favour the latter view.
Reference to scientific terms is by explanatory role, not by descriptions [Bird]
     Full Idea: I propose that reference to scientific terms, such as natural kinds and theoretical terms, is not determined by a sense or description attached to the term, but by its explanatory role.
     From: Alexander Bird (Philosophy of Science [1998], Ch.8)
     A reaction: He gives the example of an electron, which had the same role in electrical theory, despite changes in understanding its nature. One might talk of its 'natural' (causal) role, rather than its 'explanatory' role (which implies a human viewpoint).
Should vernacular classifications ever be counted as natural kind terms? [Koslicki]
     Full Idea: It is controversial whether classificatory expressions from the vernacular should ever really be counted as genuine natural kind terms.
     From: Kathrin Koslicki (The Structure of Objects [2008], 8.2)
     A reaction: This is a similar confrontation between the folk and the scientific specialist as we find in folk psychology. There are good defences of folk psychology, and it looks plausible to defend the folk classifications as having priority.