You're correct. There are more sophisticated extractors like Elias' and Peres' that do better, asymptotically achieving the upper bound given infinite data. Se

You're correct. There are more sophisticated extractors like Elias' and Peres' that do better, asymptotically achieving the upper bound given infinite data. See https://peteroupc.github.io/randextract.html https://peteroupc.github.io/randextract.html