When you lose all of your memories and there's not even a hint of a memory for you to get back - that is 「death」.

>>118567
accuracy of ownership of memory is rather arbitrary and is only legit because it's socially practical, in the first place
ultimately, faking that your brain is hosting a resurrected Napoleon is valid and accurate and objectively truthful (and usable in court as-is, just like common memory link) if it's useful enough to have its gravity