@2016 Blue Subaru BRZ Humans I guess is different, depending on the "system" in place, most the "soul" is what makes you, you, your body is just a vessel. So in this case the ship of theusus would not apply as his "soul" is the same. Where-as the paradox, or, theory of the ship of theusus, is which an object having all it's parts replaced, is it the same object? or not an entirely new one. But keeping the name would imply it is still the same (soul) even if it's no longer the same (parts)