Near the end of Primer, Abe and Aaron are at an airport, discussing and disagreeing on what actions to take. What's the nature of this discussion? I don't understand it at all.
Aaron: You're staying? Why? Why? Let's see, why would Abe stay? What possible reason could there be to be here? I guess that it just won't go back far enough, will it?
This is said sarcastically, as if Aaron already knows why Abe will stay. His "I guess that it just won't go back far enough, will it?" seems to refer to the time machine. I assume he means that Abe wants to fix everything by going back to one of the failsafe boxes that "go back far enough"?
Aaron: Tell you what, why don't you take Kara and Lauren and put them in the box... and then you and Aaron can each keep a set and you can stop feeding off it.
Abe: Don't come back.
Aaron: You can each keep a set and a hemisphere.
Does Aaron think that Abe is in love with Aaron's wife Kara? Or does he just mean that Abe envies Aaron's home life?
Abe: There hasn't been a reason to show you what I'm capable of... but I'm telling this you now. Go out there.
What is Abe capable of? Aaron has proven himself to be capable of much more than Abe throughout the film, not the least
Abe: Do whatever the hell you want. There's no way in the world I can stop you. But don't come back here... and don't come near them. Any of them.
Don't come near who? I first assumed he meant the original Abe and Aaron, since Abe plans to stop them from discovering time travel. But based on the dialogue above, it could also be Kara and Lauren, Aaron's wife and kids. Does Abe simply want to protect them from him? This might be suggested by Abe's reaction to Aaron's heroism at the party; Abe does not approve of Aaron sticking his neck out like that because he has a family.