Combining Texts

All the ideas for 'Natural Kinds and Biological Realism', 'Things' and 'Intro to I: Classical Logic'

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5 ideas

5. Theory of Logic / A. Overview of Logic / 6. Classical Logic

9463	Classical logic is bivalent, has excluded middle, and only quantifies over existent objects [Jacquette]

9. Objects / A. Existence of Objects / 2. Abstract Objects / c. Modern abstracta

7783	Bodies, properties, relations, events, numbers, sets and propositions are 'things' if they exist [Lowe]

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

17373

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

17372

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