If you are copied but cease to exist as you, does they who believes they are you become you? Or are they now someone not you but believes themselves to be you? In which case were you, who no longer exists now them instead of you?
I think Johnny made a hilarious comment on it in Sinnerman.
V: What about you? Are you in Heaven? Gone? Actually the real Johnny.
Johnny: I think that is a completely bullshit question no one should actualy give a shit about. I'm me, so what does it matter?
Which is a valid response.