[sunaurus]

> How would constructing a new ship from new materials ever count as being the same as the original ship?

If it's a perfect replica (as you said in your original comment) then by what parameters is it different from the original ship? Sure, cooordinates might be different, but cooridnates can change. If the exact replica switches places with the original, then even that difference would disappear.

By the way, I am strictly speaking about this topic in the context of the thread we are in. If a replica is built according to exact blueprints of a snapshot of the original (and assuming no mistakes are made), then why would the result be any different than just replacing one part on the original with an replica part made according to exact blueprints of a snapshot of the original part?