Combining Texts

All the ideas for 'Natural Kinds and Biological Realism', 'Individuals in Aristotle' and 'Elucidation of some points in E.Schrder'

expand these ideas     |    start again     |     specify just one area for these texts

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5 ideas

4. Formal Logic / F. Set Theory ST / 3. Types of Set / b. Empty (Null) Set

14238

A class is an aggregate of objects; if you destroy them, you destroy the class; there is no empty class [Frege]

9. Objects / E. Objects over Time / 9. Ship of Theseus

16157

Insurance on the original ship would hardly be paid out if the plank version was wrecked! [Frede,M]

26. Natural Theory / B. Natural Kinds / 1. Natural Kinds

17371

Some kinds are very explanatory, but others less so, and some not at all [Devitt]

27. Natural Reality / G. Biology / 5. Species

17372

The higher categories are not natural kinds, so the Linnaean hierarchy should be given up [Devitt]

17373

Species pluralism says there are several good accounts of what a species is [Devitt]