This isn’t obvious. In particular, note that your “obvious example” violates the basic assumption all these attempts at a decision theory are using, that the payoff depends only on your choice and not how you arrived at it.
Omega simulates you in a variety of scenarios. If you consistently make rational decisions he tortures you.
Omega simulates you in a variety of scenarios. If you consistently make rational decisions he tortures you.
My reply to this was going to be essentially the same as my comment on bentarm’s thread, so I’ll just point you there.