Combining Texts
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'Philosophy of Mathematics', 'Outlines of Pyrrhonism' and 'An Axiomatization of Set Theory'
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2 ideas
7. Existence / C. Structure of Existence / 7. Abstract/Concrete / a. Abstract/concrete
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The abstract/concrete boundary now seems blurred, and would need a defence [Shapiro]
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Mathematicians regard arithmetic as concrete, and group theory as abstract [Shapiro]
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