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All the ideas for 'Letters to Edward Stillingfleet', 'No Moral Difference' and 'Concepts and Counting'

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6 ideas

6. Mathematics / A. Nature of Mathematics / 4. Using Numbers / c. Counting procedure
17462 A single object must not be counted twice, which needs knowledge of distinctness (negative identity) [Rumfitt]
6. Mathematics / B. Foundations for Mathematics / 5. Definitions of Number / c. Fregean numbers
17461 Some 'how many?' answers are not predications of a concept, like 'how many gallons?' [Rumfitt]
9. Objects / D. Essence of Objects / 3. Individual Essences
15990 Every individual thing which exists has an essence, which is its internal constitution [Locke]
11. Knowledge Aims / B. Certain Knowledge / 1. Certainty
15994 If it is knowledge, it is certain; if it isn't certain, it isn't knowledge [Locke]
25. Social Practice / F. Life Issues / 2. Euthanasia
4052 It has become normal to consider passive euthanasia while condemning active euthanasia [Rachels]
4053 If it is desirable that a given patient die, then moral objections to killing them do not apply [Rachels]