This philosophical dilemma asks whether, when all parts in a ship are replaced, it remains the same as the original ship. Like the ship, every physical aspect of the Major has been exchanged for cybernetic enhancements owned by Section Nine, except for a small part of her original brain. Thus Kusanagi’s Paradox adds an extra dimension to Theseus’ ship: life, a mind, a ghost. This “ghost” is what supposedly makes a person uniquely sentient and human in the world of Ghost in the Shell. Ultimately, if Kusanagi has a ghost, this should define her as her own unique individual.
However, the “answer” to her paradox is not so simple as defining herself solely based on her psyche. Throughout the film, she observes others’ cyberbrains being hacked into or manipulated by the Puppet Master, implanted with false memories, and eventually begins to question whether she herself is real (Sharalyn Orbaugh, Sex and the Single Cyborg, pg. 446.) Kusanagi cannot tell whether her memories or even her ghost are authentic, or whether everything she thinks about herself is entirely fabricated by Section Nine. As she asks Batou, “I mean, who knows what's inside our heads? Have you ever seen your own