Your doppelganger walks in the door just now. By asking probing questions, you establish he has a perfect copy of your memories and experiences, in every detail. He laughs at the same jokes, and cries at the same point of sappy movies you do (even though you never told anyone this). You can not discern any difference. Furthermore, he (apologies if you are female, just global replace the pronoun) has been engineered in a way that he will not age, or forget, or degrade in any way over time the way you will. Given the awkwardness of there being two people with one identity, he carefully explains that it only makes sense that he goes on as the "real you." To facilitate the process, he hands you a loaded gun, and tells you that you know what needs to be done and leaves the room.
Do you put the gun up to your head and pull the trigger? If not, why not? Surely, the fact of your memories going on is enough to assure you that you are not really "dying," just making it easier to resolve this complex situation?
Well, insofar as the doppelganger and I have sepata experiences, our personalities have already begun to diverge. Now, if the doppelganger whipped out a pair of EEG helmets and demonstrated that we could sync our experiences - eg, I take a sleeping pill and let my doppelganger go out on the town for a night, but I can easily 'catch up' the following morning - then i'd think about it.
Do you put the gun up to your head and pull the trigger? If not, why not? Surely, the fact of your memories going on is enough to assure you that you are not really "dying," just making it easier to resolve this complex situation?