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Nov 25, 2016 at 18:35 comment added Alex Mennen That doesn't work. Let $k$ be even with $k\notin A$. Then $M$ will guess that $k\in A$ and be wrong with probability 1. I wanted $M$ to be correct with probability greater than $1/2$ on every fixed $k$, not just for it to be right about most $k$.
Nov 24, 2016 at 21:09 review First posts
Nov 24, 2016 at 21:25
Nov 24, 2016 at 21:04 history answered none CC BY-SA 3.0