Did Dave feel guilt when deactivating Hal because he felt like he was killing an actual person, or was Dave simply really upset that all his friends were dead and he hated Hal for killing them?
Are you fucking kidding me? He has to breathe. The ship loses oxygen so he need to fucking breathe with the mask. Can you please stop trying so hard to hate 2001? It's fuckign pathetic.
I suppose it would depend on how the viewer sees it. I always interpreted it as Dave just being absolutely terrified the whole time when he's back in the ship, but his fear fuels him to deactivate Hal. So when Hal reverts back to his first operation, the Daisy bit, Dave is just fucking confused as well as scared but goes along with it just to keep him sated in a way.
There are very little differences and most of them are because of technical limitations. For example, in the book the monolith is located on Saturn, but they couldn't build the ring for the movie so they made it on Jupiter instead.
The fuck are you talking about? The planets being different for technical reasons is not something I pulled out of thin air, it's a factual fact which I think is written in the preface by Arthur in the book.
Never fucking reply to me again.