wuthefwasthat comments on No one knows what Peano arithmetic doesn't know - Less Wrong

17 Post author: cousin_it 16 December 2011 09:36PM

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Comment author: wuthefwasthat 16 December 2011 10:26:34PM *  4 points [-]

Well, that argument only goes through if the other theory is recursively enumerable, so PA isnt as awesome as you make it sound.

Comment author: cousin_it 16 December 2011 11:17:40PM *  4 points [-]

Agreed. For example, we can't learn "all truths about the integers" by bootstrapping from PA in this way. But we can get all of formalist mathematics.