|Natural Kinds, philosophy: deviating from the biological definition, substances such as gold, water, etc. are referred to as natural kinds in the recent philosophical discussion. This goes back to the way in which these terms were introduced. (See H. Putnam, “The Meaning of 'Meaning”'. In Philosophical Papers, Vol. 2. Mind, Language and Reality, Cambridge.) Starting from a primary showing, the natural kind is defined as "something like this". The decisive point here is that there is no limit to future research. Virtually, any property that is initially attributed can prove to be a false assumption. See also introduction, definitions, terms.|
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|Fra I 686
Natural Kind/BurgeVsPutnam: Expressions referring to them should not be constructed in an indexical manner nor be analyzed like that. (Twin Earth: "This is water").
The differences in the beliefs do not go back to supposedly hidden indexicality!
Origins of Objectivity Oxford 2010
M. Frank (Hrsg.)
Analytische Theorien des Selbstbewusstseins Frankfurt 1994