The Ship of Theseus

Written by Studio AM.

Imagine a wooden ship kept in a harbor as a monument. Over the years its planks rot and are replaced one by one, until not a single original piece remains. Is it still the same ship? Now suppose someone gathered all the discarded planks and rebuilt the original vessel from them. Which vessel should count as the original ship: the restored one in the harbor or the reassembled one in the workshop?

The puzzle asks what we mean when we call something the same over time. We speak as if identity were a simple fact, a label that either applies or does not. The ship raises a difficulty for that view. Different criteria can produce different answers. We might prioritize the original material, the continuing structure, or the ship's history and function. Each choice needs a reason.

The problem is not confined to ships. A person can change greatly in appearance, habits and beliefs while continuing to be recognized as the same individual. A river keeps its name though no drop stays in it. An orchestra survives the retirement of all its players. In each case, the question is which kind of continuity matters.

Perhaps identity is less a thing an object possesses than a story we choose to keep telling about it. That is one possible response, not a settled answer. Someone who gives priority to original material may disagree, and the puzzle asks us to explain why we favor one criterion over another.

Questions

Choose an answer. The explanation appears after you answer.

  1. Question 1 of 4

    What is the main point of the passage?

  2. Question 2 of 4

    In the second version of the puzzle, what is built from the discarded planks?

  3. Question 3 of 4

    The examples of the body, the river, and the orchestra are used to show that:

  4. Question 4 of 4

    What does 'vessel' mean in this passage?

Score: none answered yet.

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