Combining Philosophers

Ideas for William James, Volker Halbach and Stephen Yablo

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3 ideas

7. Existence / C. Structure of Existence / 2. Reduction

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That Peano arithmetic is interpretable in ZF set theory is taken by philosophers as a reduction [Halbach]

7. Existence / C. Structure of Existence / 7. Abstract/Concrete / a. Abstract/concrete

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Concrete objects have few essential properties, but properties of abstractions are mostly essential [Yablo]

10578

We are thought to know concreta a posteriori, and many abstracta a priori [Yablo]