  The uncertainty principle states that a measurement inevitably disturbs the
system, while it is often supposed that a quantum system is not disturbed
without state change. Korzekwa, Jennings, and Rudolph [Phys. Rev. A 89, 052108
(2014)] pointed out a conflict between those two views, and concluded that
state-dependent formulations of error-disturbance relations are untenable.
Here, we reconcile the conflict by showing that a quantum system is disturbed
without state change, in favor of the recently obtained universally valid
state-dependent error-disturbance relations.
