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Single Idea 19391

[filed under theme 5. Theory of Logic / K. Features of Logics / 5. Incompleteness ]

Full Idea

The true principle is that we can assign to every object its determined characteristic number.

Gist of Idea

We can assign a characteristic number to every single object

Source

Gottfried Leibniz (Towards a Universal Characteristic [1677], p.18)

Book Ref

Leibniz,Gottfried: 'Leibniz Selections', ed/tr. Wiener,Philip P. [Scribners 1951], p.18


A Reaction

I add this as a predecessor of Gödel numbering. It is part of Leibniz's huge plan for a Universal Characteristic, to map reality numerically, and then calculate the truths about it. Gödel seems to allow metaphysics to be done mathematically.


The 10 ideas with the same theme [some truths of a system evade formal proof]:

We can assign a characteristic number to every single object [Leibniz]
Gödel's First Theorem sabotages logicism, and the Second sabotages Hilbert's Programme [Smith,P on Gödel]
The undecidable sentence can be decided at a 'higher' level in the system [Gödel]
Gödel's Theorems did not refute the claim that all good mathematical questions have answers [Gödel, by Koellner]
If completeness fails there is no algorithm to list the valid formulas [Tharp]
Two routes to Incompleteness: semantics of sound/expressible, or syntax of consistency/proof [Smith,P]
We have no argument to show a statement is absolutely undecidable [Koellner]
The first incompleteness theorem means that consistency does not entail soundness [Horsten]
A deductive system is only incomplete with respect to a formal semantics [Rossberg]
Axioms are ω-incomplete if the instances are all derivable, but the universal quantification isn't [Engelbretsen/Sayward]