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Ideas for 'Thinking About Mathematics', 'Essays on Active Powers 3: Princs of action' and 'works'

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5. Theory of Logic / D. Assumptions for Logic / 2. Excluded Middle

8729	Intuitionists deny excluded middle, because it is committed to transcendent truth or objects [Shapiro]

5. Theory of Logic / G. Quantification / 4. Substitutional Quantification

10800

The values of variables can't determine existence, because they are just expressions [Ryle, by Quine]