Combining Texts
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'Brainstorms:Essays on Mind and Psychology', 'The Concept of Logical Consequence' and 'Grundlagen der Arithmetik (Foundations)'
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3 ideas
7. Existence / A. Nature of Existence / 1. Nature of Existence
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Affirmation of existence is just denial of zero [Frege]
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7. Existence / A. Nature of Existence / 4. Abstract Existence
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If abstracta are non-mental, quarks are abstracta, and yet chess and God's thoughts are mental [Rosen on Frege]
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The equator is imaginary, but not fictitious; thought is needed to recognise it [Frege]
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