Oh god. Please tell me that you see the difference between drunk driving being related to to the cause of death and smoking being related to the cause of death. For the love of god...please.
But. Regardless, despite the very obvious difference between those two things, yes the arguments are circumstantial. Which is why, as I pointed out before, its a control group. If you have a group of people living in a town and 5,000 of the people who don't smoke get lung cancer and 50,000 of the people who smoke get lung cancer, you can conclude something about smoking. Its not about the individual cases. Given any particular individual case, you don't know what the exact cause was. But given the vast difference between people who smoke and people who don't, you can conclude something based off of that.
Nope, no difference ... none, zero, zilch, you are projecting a difference. Lung cancer, as I pointed out many many times, is caused by chemicals which are also in car, factory, and power plant exhaust, of which there are millions of tons put into the air every year. One car alone puts out a thousand times the amount as a chain smoker does, same chemicals that cause lung cancer. Lung cancer has many other variables as well, many people are genetically predisposed to cancer. The reason the connection was made was because they discovered that certain chemicals increase the
chances of getting cancer, and that cigarettes contain these, but what they fail to mention is that other sources put out a LOT more (tons more) than cigarettes, because the US care manufacturers forced the anti-smoking groups to stop airing that fact. you are now running in circles, you can't prove your point so you are forcing people to repeat themselves in a failed attempt to wear us down. Well, I don't wear down. Relating all deaths to smoking like that is purely circumstantial, there are many many more common causes for lung cancer, moron.