Combining Texts

All the ideas for 'Natural Kinds and Biological Realism', 'Presupposition' and 'The Realm of Matter'

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6 ideas

4. Formal Logic / A. Syllogistic Logic / 3. Term Logic

19053

Logic would be more natural if negation only referred to predicates [Dummett]

5. Theory of Logic / E. Structures of Logic / 2. Logical Connectives / c. not

19052

Natural language 'not' doesn't apply to sentences [Dummett]

7. Existence / A. Nature of Existence / 6. Criterion for Existence

18521

The criterion of existence is the possibility of action [Santayana]

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]