If you take someone's thoughts and feelings away, bit by bit, consistently, then they have nothing left, except some gritty, gnawing, shitty little instinct, down there, somewhere, worming round the gut, but so far down, so hidden, it's impossible to find. Imagine, if you will, a worlwide conspiracy to deny the existence of the colour yellow. And whenever you saw yellow, they told you, no, that isn't yellow, what the fuck's yellow? Eventually, whenever you saw yellow, you would say: that isn't yellow, course it isn't, blue or green or purple, or... You'd say it, yes it is, it's yellow, and become increasingly hysterical, and then go quite berserk.
- David Edgar, Mary Barnes