🧪 Philosophy Metaphysics Simulation

This simulation turns Plutarch's classic paradox into something you can watch happen. A 3D hull made of forty planks sits in dry dock; each time you replace one, the original piece doesn't vanish — it travels to the exact matching position of a second hull taking shape behind it. Over time Ship A keeps its shape and location but loses its original matter, while Ship B is built entirely of authentic parts in a different place. Live readouts track how much original material each hull holds, and a criterion selector lets you see how spatiotemporal continuity, material composition, and Derek Parfit's no-fact-of-the-matter view each answer the question "which one is really the ship?" differently — the exact same structural puzzle that shows up in debates about personal identity, corporate identity, and persistence through change.