He asks you if you want to upgrade your body and become a cyborg too.
You wonder if that really is still your friend in the cyborg body and pepper him with a lot of questions.
His answers seem rather convincing: he remembers certain things that no one else could know, but he also has some memory lapses that seem all too human.
Do you agree to the upgrade? Is that still really your friend?
Ten years ago, I would have said ‘yes’ without a moment’s hesitation.
Today?
Not so much.
My take on the star trek transporter:
It breaks you up into billions of pieces, effectively killing you. It reassembles an exact copy that, if it is alive, has no human soul and no intelligence.
But you are still dead.