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Ideas for 'The Evolution of Logic', 'Intro to 'The Reason's Proper Study'' and 'Posthumous notes'

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2 ideas

18. Thought / D. Concepts / 3. Ontology of Concepts / c. Fregean concepts

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The Fregean concept of GREEN is a function assigning true to green things, and false to the rest [Hart,WD]

18. Thought / E. Abstraction / 7. Abstracta by Equivalence

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Abstracted objects are not mental creations, but depend on equivalence between given entities [Hale/Wright]