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Single Idea 10489

[filed under theme 9. Objects / A. Existence of Objects / 2. Abstract Objects / c. Modern abstracta ]

Full Idea

We twentieth century city dwellers deal with abstract objects all the time, such as bank balances, radio programs, software, newspaper articles, poems, mistakes, triangles.

Gist of Idea

We deal with abstract objects all the time: software, poems, mistakes, triangles..

Source

George Boolos (Must We Believe in Set Theory? [1997], p.129)

Book Ref

Boolos,George: 'Logic, Logic and Logic' [Harvard 1999], p.129


A Reaction

I find this claim to be totally question-begging, and typical of a logician. The word 'object' gets horribly stretched in these discussions. We can create concepts which have all the logical properties of objects. Maybe they just 'subsist'?


The 10 ideas from 'Must We Believe in Set Theory?'

The logic of ZF is classical first-order predicate logic with identity [Boolos]
Mathematics and science do not require very high orders of infinity [Boolos]
The iterative conception says sets are formed at stages; some are 'earlier', and must be formed first [Boolos]
Naïve sets are inconsistent: there is no set for things that do not belong to themselves [Boolos]
It is lunacy to think we only see ink-marks, and not word-types [Boolos]
I am a fan of abstract objects, and confident of their existence [Boolos]
We deal with abstract objects all the time: software, poems, mistakes, triangles.. [Boolos]
Mathematics isn't surprising, given that we experience many objects as abstract [Boolos]
Infinite natural numbers is as obvious as infinite sentences in English [Boolos]
A few axioms of set theory 'force themselves on us', but most of them don't [Boolos]