it works

[billy]

what does "reinforcement" mean in that context?

how it affects the brain in triggering you into wanting another cig in order to get nicotine.

unlike dependence which triggers the brain into mentally needing it.

physical dependence is something else altogether.

the graph shown has many flaws, it doesn't take into account availability,
prohibitive cost, etc etc.

for instance if you were on a no smoking plane for 48 hours you may sweat a little and feel a bit anxious but that would be it

for a heroine addict to go 48 hrs without a fix would be exponentially more painful both physically and mentally.