Ideas from 'Natural Kinds and Biological Realism' by Michael Devitt [2009], by Theme Structure

[found in 'Putting Metaphysics First' by Devitt,Michael [OUP 2010,978-0-19-957697-5]].

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26. Natural Theory / B. Concepts of Nature / 6. Natural Kinds / a. Natural kinds
Some kinds are very explanatory, but others less so, and some not at all
27. Natural Reality / C. Biology / 5. Species
Species pluralism says there are several good accounts of what a species is
The higher categories are not natural kinds, so the Linnaean hierarchy should be given up