  The objection extends far beyond the scope of Landauer's principle. It shares much with general Boltzmannian arguments against the Gibbs approach to statistical mechanics. However, it is questionable whether proofs following the approach of Piechocinska are genuinely vulnerable to the accusation. Piechocinska did not, in fact, attribute a thermodynamic entropy to the Gibbs entropy measure (entropy was barely even mentioned in her paper) nor, contrary to some criticisms, did she assume a specific model of how the reset operation is performed, at least in the quantum case. The assumption that generates the logarithmic form of Landauer's principle is that heat baths are initially canonically distributed (an assumption which Norton, at least, appeared willing to concede) combined with the requirement that a single Hamiltonian (or unitary, in the case of quantum theory) dynamics is used to describe the combined evolution of the system and environment, independantly of the input logical state. Similar comments may be made about (Maroney 2009), while (Turgut 2009) managed to go further and deduce a stronger constraint, which implies the usual version of Landauer's principle, but without even needing to consider probability distributions over the input logical states.