  Hemmo and Shenker considered whether this work extraction requires a record to remain of the initial location of the molecule, as supporters of the Landauer-Penrose-Bennett resolution would suggest. They argue that this is not necessary. Instead they perform an operation equivalent to ‘erasure-by-destruction’, on the auxiliary system. This destroys any remaining macroscopic trace of the information about where the molecule was located, without incurring any thermodynamic cost (see also Maroney (2005), who considered similar processes from within a Gibbsian framework), but leaves the auxiliary in one of several low Boltzmann entropy macrostates.