Kusanagi: Well, I guess cyborgs like myself have a tendency to be paranoid about our origins. Sometimes I suspect I'm not who I think I am. Like maybe I died a long time ago, and somebody took my brain and stuck it in this body. Maybe there never was a real me in the first place, and I'm completely synthetic like that thing. Batou: You've got human brain cells in that titanium shell of yours. You're treated like other humans, so stop with the angst. Kusanagi: But that's just it. That's the only thing that makes me feel human: The way I'm treated. I mean, who knows what's inside our heads. Have you ever seen your own brain? Batou: It sounds to me like you're doubting your own ghost. Kusanagi: What if a cyber-brain could possibly generate its own ghost, create a soul all by itself? And if it did, just what would be the importance of being human then? Batou: Hmph. That's bullshit. You know you're dying to see what's inside of that thing, aren't you? And I can't stop you. Neither of us has any idea what's inside there. Just be careful, okay?
Ghost in the Shell (1995)