### All the ideas for Michael Burke, Tuomas E. Tahko and C.S. Lewis

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13 ideas

###### 9. Objects / A. Existence of Objects / 5. Individuation / e. Individuation by kind
 16235 Persistence conditions cannot contradict, so there must be a 'dominant sortal' [Burke,M, by Hawley]
 14753 The 'dominant' of two coinciding sortals is the one that entails the widest range of properties [Burke,M, by Sider]
###### 9. Objects / B. Unity of Objects / 1. Unifying an Object / b. Unifying aggregates
 16072 'The rock' either refers to an object, or to a collection of parts, or to some stuff [Burke,M, by Wasserman]
###### 9. Objects / B. Unity of Objects / 3. Unity Problems / b. Cat and its tail
 14751 Tib goes out of existence when the tail is lost, because Tib was never the 'cat' [Burke,M, by Sider]
###### 9. Objects / B. Unity of Objects / 3. Unity Problems / c. Statue and clay
 13278 Maybe the clay becomes a different lump when it becomes a statue [Burke,M, by Koslicki]
 16234 Burke says when two object coincide, one of them is destroyed in the process [Burke,M, by Hawley]
 16071 Sculpting a lump of clay destroys one object, and replaces it with another one [Burke,M, by Wasserman]
###### 9. Objects / B. Unity of Objects / 3. Unity Problems / d. Coincident objects
 14750 Two entities can coincide as one, but only one of them (the dominant sortal) fixes persistence conditions [Burke,M, by Sider]
###### 10. Modality / D. Knowledge of Modality / 4. Conceivable as Possible / a. Conceivable as possible
 16978 If conceivability is a priori coherence, that implies possibility [Tahko]
###### 14. Science / D. Explanation / 2. Types of Explanation / k. Explanations by essence
 16975 Essences are used to explain natural kinds, modality, and causal powers [Tahko]
###### 23. Ethics / C. Virtue Theory / 3. Virtues / d. Courage
 15640 Courage is not a virtue, but the form of every virtue at its testing point [Lewis,CS]
###### 26. Natural Theory / D. Laws of Nature / 8. Scientific Essentialism / a. Scientific essentialism
 16976 Scientific essentialists tend to characterise essence in terms of modality (not vice versa) [Tahko]
###### 26. Natural Theory / D. Laws of Nature / 8. Scientific Essentialism / b. Scientific necessity
 16977 If essence is modal and laws are necessary, essentialist knowledge is found by scientists [Tahko]