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Ideas for 'Intro to Naming,Necessity and Natural Kinds', 'Logicism in the 21st Century' and 'Metaphysics of Morals I: Doctrine of Right'

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2 ideas

18. Thought / C. Content / 8. Intension
The intension of "lemon" is the conjunction of properties associated with it [Schwartz,SP]
18. Thought / E. Abstraction / 7. Abstracta by Equivalence
One first-order abstraction principle is Frege's definition of 'direction' in terms of parallel lines [Hale/Wright]