> *"and means that classical physics cannot account for diamagnetism" [assuming classical statistical physics assumptions, such as nothing special happens at t

> *"and means that classical physics cannot account for diamagnetism" [assuming classical statistical physics assumptions, such as nothing special happens at the boundary]. The whole result is due to unrealistic boundary condition (for magnetic materials) that the Boltzmann isotropic distribution of momenta is valid at the boundary. Diamagnetism is present in classical physics, for example, electron(s) circling in magnetic field create magnetic moment opposed to the magnetic field.