Bohr treats M devices in a special way. He does not represent an M device as a possibility wave but considers it a solid actuality. By objectifying the M device, he can account for the “ordinariness” of quantum fact and avoid such monstrosities as Schrödinger’s live/dead cat which arise if you believe that the same quantum rules hold for cats and electrons. Throughout his career Bohr continued to emphasize the “classical style” of existence enjoyed by ordinary objects.
