Feynman teaching note

The Ship of Theseus

SubjectPhilosophy

Area tags

Philosophy

A ship has its planks replaced one by one as they rot. After years, not a single original plank remains. Is it still the same ship? Now suppose someone hoarded the old planks and rebuilt them into a ship. Which one is the 'real' Theseus? The puzzle exposes that 'same' can mean different things. If sameness means 'made of the same matter', the rebuilt one wins. If it means 'continuous in form and function', the repaired one wins. Both can't be the single true ship, yet each has a fair claim. The lesson generalises: your body replaces most of its cells over years, yet you feel like the same person. Identity may not live in the stuff we're made of, but in the continuity of pattern and story. There may be no single fact of the matter, only different useful definitions.

Same topic, fresh practice—does not count as an adaptation.

Practice building on this note. If you publish, it can show “Based on” and add an adaptation.

Feedback & gaps

Clarity score: 79/100How well you know it: Can explain it simply

Apply the Ship of Theseus to the claim 'you are the same person you were at age five'.

Doesn't distinguish numerical identity from qualitative similarity.
Could offer at least one philosopher's proposed resolution.

Comments

No comments yet.