Sorry to interrupt this witty exchange... But if you create a perfect copy of someone (on an atomic level, yes yes, I know Heir Heizenberg would complain!) then you destroy the original... what difference does it make?
For the original it would just be like going to sleep... for the copy it would just be like waking up. You could say that the copy wouldn't be the same conciousness as the original... But then I put it to you that the conciousness you experience today is not the same as yesterday, it is a new conciousness.
If you died in your sleep you'd never know about it. If you died in your sleep then you were replaced with a prefect copy, no one would know about it.