Ideas of John Dupré, by Theme

[British, fl. 1993, At Stanford and Birkbeck, and the Professor at Exeter University.]

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7. Existence / E. Categories / 1. Categories
All descriptive language is classificatory
7. Existence / E. Categories / 2. Categorisation
We should aim for a classification which tells us as much as possible about the object
9. Objects / D. Essence of Objects / 8. Essence as Explanatory
Natural kinds don't need essentialism to be explanatory
9. Objects / D. Essence of Objects / 10. Essence as Species
It seems that species lack essential properties, so they can't be natural kinds
A species might have its essential genetic mechanism replaced by a new one
14. Science / A. Basis of Science / 4. Prediction
The possibility of prediction rests on determinism
18. Thought / C. Content / 5. Twin Earth
Presumably molecular structure seems important because we never have the Twin Earth experience
26. Natural Theory / B. Concepts of Nature / 6. Natural Kinds / a. Natural kinds
Kinds don't do anything (including evolve) because they are abstract
Phylogenetics involves history, and cladism rests species on splits in lineage
26. Natural Theory / B. Concepts of Nature / 6. Natural Kinds / g. Critique of kinds
Wales may count as fish
Natural kinds are decided entirely by the intentions of our classification
Borders between species are much less clear in vegetables than among animals
Even atoms of an element differ, in the energy levels of their electrons
Ecologists favour classifying by niche, even though that can clash with genealogy
Cooks, unlike scientists, distinguish garlic from onions
27. Natural Reality / C. Biology / 5. Species
Species are the lowest-level classification in biology
The theory of evolution is mainly about species