I’ve always had a gripe about The Voyage Home. I never really liked the film very much. In particular, there is a bit of a logic problem regarding the following dialogue:
The thing is, Spock wouldn’t actually remember his death.
Spock, in his current incarnation, would remember his birth, up through the moment he terminated his mind meld with McCoy. His memory would then pick up inside the Mark VI torpedo casing, followed by the subsequent events on Genesis, etc., the refusion on Vulcan, and forward from there.
The event of Spock’s actual death was not part of his Katra stored in McCoy, and occurred before his regeneration.
I think Spock is just having a laugh at McCoy's expense.
McCOY: Come on Spock, it's me, McCoy! You really have gone where no man has gone before. Can't you tell me what it felt like?
SPOCK: It would be impossible to discuss the subject without a common frame of reference.
...
McCOY: You mean I have to die to discuss your insights on death?
The thing is, Spock wouldn’t actually remember his death.
Spock, in his current incarnation, would remember his birth, up through the moment he terminated his mind meld with McCoy. His memory would then pick up inside the Mark VI torpedo casing, followed by the subsequent events on Genesis, etc., the refusion on Vulcan, and forward from there.
The event of Spock’s actual death was not part of his Katra stored in McCoy, and occurred before his regeneration.
I think Spock is just having a laugh at McCoy's expense.