I do believe this is teachable, and it forces the subject to follow an explicit strategy to come up with their estimate.
Depending on the choice of strategy, you’d of course get all sorts of mistaken answers—but at least, they would not be influenced by this particular bias :)
Not so fast. You are only looking at results of attempts to debias people without telling them explicitly that that’s what is being done to them.
None of the studies even started on teaching people to substitute a judgement of some other factor for guessing probability directly.
I follow a generally useful policy to never estimate probability directly. (I also call this the no-pulling-numbers-out-of-my-ass policy.)
I do believe this is teachable, and it forces the subject to follow an explicit strategy to come up with their estimate.
Depending on the choice of strategy, you’d of course get all sorts of mistaken answers—but at least, they would not be influenced by this particular bias :)