Nisan comments on Formulas of arithmetic that behave like decision agents - Less Wrong
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Comments (33)
Yes, I really mean phi to be a formula based on the provability predicate. The third line is really shorthand for
where Sub is a function that replaces the first two free variables in the Gödelized formula with a and b. So we can quantify over a and b.
I suppose I should mention this in the post.