  and this does not imply anything for the state in question! Thus, the BLW uncertainty relation does not rule out that for some states it might be possible to perform a joint measurement in which both \(D(\mu, \mu')\) and \(D(\nu, \nu')\) are very small, and in this sense have negligibe error and disturbance. It seems premature to say that this vindicates Heisenberg’s intuitions.