 Unfortunately, Lange’s characterization threatens to leave readers with the impression that if “we” had not shifted our perspective in the analysis of the gas, no change to the inertial mass of the gas sample would have ensued. Of course, it is unlikely that Lange means this. Lange would likely agree that even if no human beings are around to analyze a gas sample, the gas sample will respond in any physical interaction differently as a whole after it has absorbed some energy precisely because its inertial mass will have increased.