barryb3 wrote:
Well, I'd have two corrections there -- (1) the addiction "becomes even harder to overcome."
I did some research on this the last time the question came up. A once-learned then-extinguished behavior is easier to relearn than a behavior not previously learned -- that much we know.
It hasn't been well studied in humans, but with lab animals, a learned-extinguished-relearned behavior is actually easier to extinguish the second time around. I guess it's as if the extinguished state is sitting there dormant, much as the learned state was sitting there dormant during the extinguished period. Or something.
What does this mean for us humans? Well, I don't think it would be wise or safe to start a cycle of addicted/non-addicted on the grounds that we can always cure the addiction again. Some really bad things can happen during addiction.
On the bright side, people who screw up and get themselves readdicted need not despair. Re-curing is possible.
I should probably emphasize that, for this to even apply, the relearning happens after the behavior is completely extinguished. If the animal starts "relearning" before true extinction then it's actually receiving variable reward (aka intermittent reinforcement), and that's what really nails behavior down hard.