Bohr speaks of the “impossibility of neatly separating the behavior of atomic systems from their interaction with the measuring device used to define the conditions under which the phenomenon appears.”53 When he wrote this, in the 1940s, the applications of the theory were confined to the laboratories that measured atomic systems. Almost a century later, we know that the theory is valid for every object in the universe. We need to amend “atomic systems” to “all objects,” and “interaction with measuring equipment” to “interaction with any other thing whatsoever.”
