Some of them may not be, and they are the lucky ones. Most of them are in denial, and the reason they are a social smoker still is because at some point during the night, they have a small craving.
I fail to see how the existence of social smokers nulls the well known scientific fact that nicotine is addictive.
I fail to see how the existence of social smokers nulls the well known scientific fact that nicotine is addictive.