Why is the Ship of Theseus a paradox?

Why is the Ship of Theseus a paradox?

Education

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A Fresco from Pompeii depicting Theseus and Ariadne escaping from Crete. According to Plutarch, the Athenians preserved the ship that Theseus used to escape, by replacing the parts one by one as they decayed.

The Ship of Theseus is a philosophical thought experiment that dates back to ancient Greece. The story goes that Theseus, a legendary hero, sailed a ship that was preserved over time by replacing its parts as they decayed or wore out.

Theseus was the son of Aegeus, the king of Athens, and Aethra, the daughter of the king of Troezen.

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Themis and Aegeus. Attic red-figure kylix, 440–430 BC. From Vulci.

Theseus was known for his many adventures and heroic feats, including the slaying of the Minotaur, a creature with the head of a bull and the body of a man, who lived in the labyrinth on the island of Crete.

According to legend, Theseus volunteered to be one of the seven Athenian youths who were sent as tribute to King Minos of Crete to be sacrificed to the Minotaur. With the help of Ariadne, King Minos’ daughter, Theseus was able to navigate the labyrinth and slay the Minotaur, freeing Athens from the annual tribute.

Theseus also played a role in the myth of the Amazons, a tribe of warrior women.

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Theseus Recognized by his Father by Hippolyte Flandrin (1832)

He was said to have captured their queen, Hippolyta, and made her his wife. Theseus went on to participate in many other adventures, including the Calydonian Boar Hunt and the expedition of the Argonauts.

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Theseus and the Minotaur

In addition to his heroic deeds, Theseus became remembered as a wise and just ruler of Athens. And said to have established the concept of democracy and instituted many reforms that improved the lives of his people. Many consider Theseus one of the greatest heroes of Greek mythology and remains a popular figure in literature and art to this day.

Where his ship became housed for nearly 500 years still remains a mystery as its exact location remains unknown. However, said to have become preserved in the Athenian harbor of Piraeus. Furthermore, where it remained housed in a museum for centuries and apparently became frequented by the ancient travelers to Athens.

Map of Piraeus, 1908
Map of Piraeus, 1908

The question arises though, if all the parts of the ship eventually became replaced, is it still the same ship that Theseus sailed?

The Ship of Theseus has become discussed by philosophers for centuries, with different interpretations and applications. One of the earliest recorded discussions of the Ship of Theseus was by the philosopher Plutarch in the 1st century AD. Plutarch used the example to illustrate the idea of identity. And change over time.

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Plutarch in the Nuremberg Chronicle

In the 17th century, the philosopher Thomas Hobbes used the Ship of Theseus to argue for the concept of materialism. Which holds that only physical matter exists and that mental states and processes can become explained in terms of physical phenomena.

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Thomas Hobbes

In the 20th century, the Ship of Theseus has become used in discussions of personal identity and the nature of consciousness. The philosopher Derek Parfit used the example to argue that personal identity is not a simple matter of continuity of physical matter but rather a complex and nuanced concept that depends on psychological continuity and connectedness.

Moreover, the Ship of Theseus has also become used in discussions of identity in science fiction and popular culture. In the Star Trek: The Next Generation episode “Second Chances,” the character William Riker becomes duplicated by a transporter accident. As a result, raising questions about whether the two Rikers are the same person.

In conclusion, the Ship of Theseus remains a popular thought experiment. And lastly continues to become discussed and debated by philosophers and scholars today.

The Ship of Theseus & Maintaining Historic Ships With Historian Ryan Szimanski

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