  If the state of the demon's own mind must now be included in the system, with uncertainty over which state the demon is in, that raises the question: “Whose uncertainty?”. Perhaps it is the uncertainty the demon has at the start of the process about which state it will be in? Perhaps the statistical distribution should be abandoned, as the demon is not uncertain about its own state, but that another property—such as the proposal of Zurek—has changed by a compensating amount? Perhaps the demon has been naturalised to the point that it no longer represents an intelligent agent, possessing and acting on information, and the uncertainty is now another, external agent's uncertainty? In the latter case it would appear any hope of using the Szilard engine to answer Smoluchowski's original concern, about intelligent intervention, has been lost entirely.