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Ideas for 'Thinking About Mathematics', 'Five Milestones of Empiricism' and 'Philosophy of Mathematics'

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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]

9605	If a proposition is false, then its negation is true [Brown,JR]