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Jack comments on Newcomb's problem happened to me - Less Wrong
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Comments (97)
If Jack and Kate were already married it really would make no sense for Jack to not get a divorce just because Kate would have never married him had she suspected he would. CDT wins, here. The fact that CDT tells Jack to precommit now doesn't make it Newcomblike. Precommiting is a rational strategy in lots of games that aren't Newcomb like. The whole point of Newcomb is that even if you haven't precommitted, CDT tells you the wrong thing to do once Omega shows up.
As I said, I assumed that Kate = Omega.
Even if that assumption is fair (since it obviously isn't true I'm not sure why we would make it**) we're still entering the scenario too early. It's like being told Omega is going to offer you the boxes a year before he does. Jack now has the opportunity to precommit, but Omega doesn't give you that chance.
** I'm sure glad my girlfriend isn't a superintelligence that can predict my actions with perfect accuracy! Am I right guys?!
Point taken; the similarity is somewhat distant. (I made that assumption to show the problem's broadly Newcomblike structure, since I wrongly read JGWeissman as saying that the problem never had Newcomblike structure. But as you say, there is another, more qualitative difference.)