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Single Idea 17824

[filed under theme 4. Formal Logic / F. Set Theory ST / 7. Natural Sets ]

Full Idea

The master science can be thought of as the theory of sets with the entire range of physical objects as ur-elements.

Gist of Idea

The master science is physical objects divided into sets

Source

Penelope Maddy (Sets and Numbers [1981], II)

Book Ref

'Philosophy of Mathematics: anthology', ed/tr. Jacquette,Dale [Blackwell 2002], p.347


A Reaction

This sounds like Quine's view, since we have to add sets to our naturalistic ontology of objects. It seems to involve unrestricted mereology to create normal objects.


The 10 ideas with the same theme [which sets are natural, rather than conventional]:

What physical facts could underlie 0 or 1, or very large numbers? [Frege on Mill]
Russell's proposal was that only meaningful predicates have sets as their extensions [Russell, by Orenstein]
Russell's antinomy challenged the idea that any condition can produce a set [Quine]
A class is natural when everybody can spot further members of it [Quinton]
We can have a series with identical members [Tait]
Zermelo allows ur-elements, to enable the widespread application of set-theory [Hallett,M]
Maddy replaces pure sets with just objects and perceived sets of objects [Maddy, by Shapiro]
The master science is physical objects divided into sets [Maddy]
ZFU refers to the physical world, when it talks of 'urelements' [Chihara]
A flock of birds is not a set, because a set cannot go anywhere [Brown,JR]