I should be more precise: I don't believe that the nicotine addiction is strong enough to avoid going cold turkey. On the contrary, if you believe there is a nicotine addiction at all, you will even amplify the feeling of being dependent on cigarettes. If you can't stop smoking permanently, you'll always have an excuse: "It didn't work because of my biochemistry!". Nicotine is addictive, but that effect is neglibible compared to the psychological effects of smoking.
Myth four: that physical addiction to nicotine makes stopping difficult. It is not the chemical addiction that makes quitting smoking hard.
allencarr.com.au
To be honest, I never thought about the physical addiction of nicotine after I read Allen's book. You might say that I ignored scientific facts. But it worked for me that way: after I stopped smoking, I had no withdrawals.