Combining Texts

All the ideas for 'Natural Kinds and Biological Realism', 'Elements of Mathematical Logic' and 'Psychophysical supervenience'

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

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5 ideas

4. Formal Logic / E. Nonclassical Logics / 3. Many-Valued Logic

8942	Lukasiewicz's L3 logic has three truth-values, T, F and I (for 'indeterminate') [Lukasiewicz, by Fisher]

8. Modes of Existence / B. Properties / 4. Intrinsic Properties

15456

Extrinsic properties, unlike intrinsics, imply the existence of a separate object [Kim, by Lewis]

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]