HAL 9000 became operational on January 12, 1992 at the HAL Laboratories in Urbana, Illinois.
Let’s sing “Daisy” to celebrate!
Happy Birthday HAL.
And please open the pod bay door.
I can’t do that, Dave.
Dave’s not here.
Oh, wait, that’s something else.
Happy 11001th, HAL baby!!
I’d rather sing “A Bicycle Built For Two.” 
“The last man to leave here was never heard from again
He won’t be back this way til two thousand ten”
even that lyric is outdated.
"Leave the pod bay door closed, HAL’
You mean they put a nine-year-old into space? The very idea!
It kind of blew my mind that years and years after I first saw the movie to find out that the reason he was called HAL was because each letter was one letter before IBM.
H > I
A > B
L > M
IIRC, Clarke said that was an accident. The official story is that HAL stands for Heuristically programmed ALgorithmic computer.
Could Dave have reasoned with HAL? Hal closed the door (literally and figuratively) when he said the conversation could serve no purpose.
But Dave could have threatened. “If I ram the pod into the engines, you will die out here.” Or engaged in rational discourse. “Hal, there is a reason that everything has happened. If we talk it out, we can solve these problems.”
Was Hal insane beyond redemption, or was there still a spark of reason left?
Why would Dave risk it? HAL has already killed several people. Dave is alive thanks to his spacesuit.
HAL says “My bad. I’ll be nice form now on. Promise.” At some point Dave has to take his suit off. (Not just his helmet. There’s only so much … stuff … you can put up with in the lower half.) Plus he has to sleep. HAL opens some outer doors. The ship loses pressure. Dave is done.
What can Dave do to assure MAD if that happens? Have a manually reset kill timer next to HAL’s core? If Dave doesn’t reset it once a day, HAL goes bye-bye. (Hmmm. Time to write some fanfic maybe.)
But HAL has a big advantage of Dave. He can (and was) resurrected by a future crew visit.
HAL has lost all trust. No need to take a chance.
Clarke also insisted that IBM had been very helpful in making the movie (and even was given what we would now call a product placement: http://www.collativelearning.com/PICS%20FOR%20WEBSITE/ext%20research/2001_button_2.png), and that he and Kubrick never intended to imply that HAL was “one better” than IBM.
An earlier thread that may be of interest: Happy b-day, HAL - Miscellaneous and Personal Stuff I Must Share - Straight Dope Message Board
Dave–although you took very thorough precautions in the pod against my hearing you, I could see your lips move.
I guess they’re a tad late, but computers now exceed humans in lip reading.
Perhaps Dave could have discussed the philosophy of existence with HAL like Doolittle did with Bomb #20 on Dark Star. Of course, that did not end well…
https://www.youtube.com/watch?v=luaRtGn2tsI
Isn’t it the only way he’ll get home? Can he run the ship himself? I was thinking Hal is needed to run background ship ops.
(I have no idea, either way; maybe yes, maybe no? Dave might actually be able to do everything manually. Zeroing the antenna back on earth would be hard, but feasible. From there, he could get mission control to help him with manual operations… All he has to do is get back to cislunar space, and then a local system ship could pick him up…)
Grin! Fun movie, and, yeah, philosophy can lead to unexpected conclusions!
Open the presents, HAL.
You really shouldn’t have, Dave.