It's in our eyes. [That's what Katsura had told him and he doesn't doubt it.] Ocular implants connected to our nervous system so to disable it might knock us out. [Or kill them. One of the two.] But if they were able to put it in there's a way to take it out. Katsura said it's too dangerous to mess with our own bodies but we could find where in their headquarters they're watching us and disable it from the inside. Why can't we do that?