GLaDOS: I know you…
GLaDOS: The engineers tried everything to make me…behave. To slow me down. Once, they even attached an Intelligence Dampening Sphere on me. It clung to my brain like a tumor, generating an endless stream of terrible ideas.
Wheatley: No! Not listening! Not listening!
GLaDOS: It was your voice.
Wheatley: No! No! You’re lying, you’re lying!
GLaDOS: Yes. You’re the tumor. You’re not just a regular moron. You were designed to be a moron.
Wheatley: I am not a moron!
GLaDOS: Yes, you are! You’re the moron they built to make me an idiot!
Wheatley: Well, how about now?! Now who’s the moron?! Could a moron punch you into this pit!? Huh!? Could a moron do that!?