For (1), think about this concrete toy example: say the first thing you do is raising your right hand. The mirror clone rises his left hand. Then say you have an instinctive reaction behaving in this way:
if I see a person raising his right hand, I repeat that movement.
if I see a person raising his left hand, I do nothing.
So the next thing you do is nothing, while the next thing the mirror clone does is raising his right hand, which differentiates you from the clone.
HOWEVER, I now realize I was wrong: the mirror clone’s notion of left-right is mirrored as well.
Ok, let’s say the clone is mirrored.
For (1), think about this concrete toy example: say the first thing you do is raising your right hand. The mirror clone rises his left hand. Then say you have an instinctive reaction behaving in this way:
if I see a person raising his right hand, I repeat that movement.
if I see a person raising his left hand, I do nothing.
So the next thing you do is nothing, while the next thing the mirror clone does is raising his right hand, which differentiates you from the clone.
HOWEVER, I now realize I was wrong: the mirror clone’s notion of left-right is mirrored as well.