hahah yeah but the only point here is: it’s easier to credibly commit to a threat if executing the threat is cheap for you. And this is simply not too interesting a decision-theoretic point, just one more obvious pragmatic consideration to throw into the bag. The story even makes it sound like “Vader will always be in a better position”, or “it’s obvious that Leia shouldn’t give in to Tarkin but should give in to Vader”, and that’s not true. Even though Tarkin loses more from executing the threat than Vader, the only thing that matters for Leia is how credible the threat is. So if Tarkin had any additional way to make his commitment credible (like program the computer to destroy Alderaan if the base location is not revealed), then there would be no difference between Tarkin and Vader. The fact that “Tarkin might constantly reconsider his decision even after claiming to commit” seems like a contingent state of affairs of human brains (or certain human brains in certain situations), not something important in the grander scheme of decision theory.
I liked it precisely because it threw theory out the window and showed that cheap talk is not a real commitment.
Tarkin > I believe in CDT and I precommit to bla bla bla
Leia > I belive in FDT and I totally precommit to bla bla bla
Vader > Death Star goes brrrrr...
hahah yeah but the only point here is: it’s easier to credibly commit to a threat if executing the threat is cheap for you. And this is simply not too interesting a decision-theoretic point, just one more obvious pragmatic consideration to throw into the bag. The story even makes it sound like “Vader will always be in a better position”, or “it’s obvious that Leia shouldn’t give in to Tarkin but should give in to Vader”, and that’s not true. Even though Tarkin loses more from executing the threat than Vader, the only thing that matters for Leia is how credible the threat is. So if Tarkin had any additional way to make his commitment credible (like program the computer to destroy Alderaan if the base location is not revealed), then there would be no difference between Tarkin and Vader. The fact that “Tarkin might constantly reconsider his decision even after claiming to commit” seems like a contingent state of affairs of human brains (or certain human brains in certain situations), not something important in the grander scheme of decision theory.