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Single Idea 17620

[filed under theme 5. Theory of Logic / C. Ontology of Logic / 3. If-Thenism ]

Full Idea

If-thenism denies that mathematics is in the business of discovering truths about abstracta. ...[their opponents] obviously don't regard any starting point, even a consistent one, as equally worthy of investigation.

Gist of Idea

Critics of if-thenism say that not all starting points, even consistent ones, are worth studying

Source

Penelope Maddy (Defending the Axioms [2011], 3.3)

Book Ref

Maddy,Penelope: 'Defending the Axioms' [OUP 2013], p.99


A Reaction

I have some sympathy with if-thenism, in that you can obviously study the implications of any 'if' you like, but deep down I agree with the critics.


The 7 ideas from 'Defending the Axioms'

The Axiom of Choice paradoxically allows decomposing a sphere into two identical spheres [Maddy]
Hilbert's geometry and Dedekind's real numbers were role models for axiomatization [Maddy]
The connection of arithmetic to perception has been idealised away in modern infinitary mathematics [Maddy]
Every infinite set of reals is either countable or of the same size as the full set of reals [Maddy]
Critics of if-thenism say that not all starting points, even consistent ones, are worth studying [Maddy]
Set-theory tracks the contours of mathematical depth and fruitfulness [Maddy]
If two mathematical themes coincide, that suggest a single deep truth [Maddy]