Before revision: For example, Heisenberg emphasized a sharp "cut" between the observer (or the instrument) and the system being observed, while Bohr offered an interpretation that is independent of a subjective observer or measurement or collapse, which relies on an "irreversible" or effectively irreversible process which imparts the classical behavior of "observation" or "measurement".
After revision: For example, Heisenberg emphasized a sharp "cut" between the observer (or the instrument) and the system being observed, while Bohr offered an interpretation that is independent of a subjective observer or measurement or collapse, that relies on an "irreversible" or effectively irreversible process which imparts the classical behavior of "observation" or "measurement".