  Zurek (1989a; 1989b) proposed a development of the Landauer-Penrose-Bennett position, building on a suggestion of Bennett's, that would attempt to address some of these concerns and also whether a sufficiently cleverly programmed computer might be able to do better than Landauer's principle would suggest. If a demon performed a large number of cycles without erasing its memory, as Penrose suggested, then its memory would contain a randomly generated bit string. Zurek's suggestion was that the Boltzmannian entropy of the physical states representing the bit string needed to have added to it the algorithmic complexity of the bit string itself and it is this total entropy that is the subject of a modified second law.