Now logically if you examine other things that contain nicotine like tea or potatoes or tomatoes and determine that those things are not addictive and neither are the sugars they have in common with the tobacco plant then you can safely rule those things out as being the addictive chemicals in tobacco. All is not lost though. There are still about 4000 chemicals that are added to tobacco to examine. Its one of those 4000 chemicals that was added to tobacco that is addictive. Its just common sense and logic. A pure natural tobacco plant would be about as addictive as a tomatoe plant or a potato plant or a tea plant or any other plant that contains nicotine naturally. A simple test would be for you to smoke the leaves of a tomatoe plant and see if you get addicted to it.