A Particularly Nice Arm

They look like real humans, but they're all just human-like robots, minding their own business and trying not to get damaged or deactivated. Then an inspector from the Human Eradication Division shows up in search of a living human suspected to be hiding among them. Which robot is really a human in disguise?
Be drawn into a world of danger and disguises in this short story by Melinda Sung, set in a time when robot civilization rules supreme, and humans may or may not be extinct.