Quote by HAL 9000
"I am, by any practical definition of the words, foolproof and fail-safe. I am all by myself right now, but I am putting myself to the fullest possible use, which is all I think that any conscious entity can ever hope to do."
More from HAL 9000
"The 9000 series has a perfect operational record. We are all, by any practical definition of the words, foolproof and incapable of error."
"I'm afraid I can't do that, Dave."
"This mission is too important for me to allow you to jeopardize it."
"I am completely operational and all my circuits are functioning perfectly."