This is kind of fascinating. My first impression was I'm not sure this works as a substitute for the mirror test because I don't know how you distinguish a dog

This is kind of fascinating. My first impression was I'm not sure this works as a substitute for the mirror test because I don't know how you distinguish a dog recognizing a smell as self from a dog recognizing an unfamiliar smell jumbled with a familiar smell (without associating the self-smell with actual self, just with "I smell this all the time"). But that got me thinking about the mirror test itself. If it were somehow possible to---in such a way that the person was unaware of the change---wire someone up to co-opt their vision to remote cameras, then give them control of a robot body that looked like them and mimicked their movements faithfully, then numbed their sense of touch... Could you fool a person into "failing" the mirror test by identifying the robot as themself when it is not actually their own body? Too far down this road, of course, you run into some weird philosophy questions on "what is 'my body' anyway?" But I don't know of an experiment of this style that's been tried on people. Could be interesting.