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by ProfHewitt 1709 days ago
In foundational theories of mathematics, the following

kind of proposition is true but unprovable:

     Theorems are enumerable by an algorithm.
See the following article and associated video:

https://papers.ssrn.com/abstract=3603021

https://www.youtube.com/watch?v=AJP1VL7shiI

In foundational theories, the proposition

I'mUnprovable (used in the proof in [Gödel 1931]) does not

exist because of restrictions on orders of propositions that

were introduced by Bertrand Russell to prevent logical

contradictions in mathematics.