I find the problem of the ship to be confused. Theseus' ship is the ship which we say belongs to Theseus. So long as we agree that is the case, then it is so. There is no inherent meaning to the phrase "Theseus' ship". It has has meaning insofar as we give it meaning. Words mean what we agree words mean, and nothing is named by God. Two corollaries from Wittgenstein: (1--from Philosophic Investigations) What is true or false is what human beings say; and it is in their language that human beings agree. (2--from Tractatus) All philosophy is a critique of language. Our descriptive terms will always be an incomplete description of physical objects, but unless we agree on definitions we are talking gibberish. Therefore, one philosopher can say Theseus' ship is such and such, and the other can say it is thus and so, and they are both correct, so long as they don't violate their own definitions.