[xoxoxoBruce]

Most of us couldn't even begin to document all the changes in our lives. Peoples lives are so complicated, make so many twists and turns, I don't see how anyone can look back and say, See, that right there is why you got cancer.

If you smoke, there's a much higher chance of lung cancer. But many smoke and don't get it. That would make me think there may be some smokers with lung cancer that wasn't caused by the smoking.

Maybe if you spent your whole life in the same village, eating the same diet, keeping the same routine, there might be a clue. Even then, same village, same foods, changes in the environment can mean those foods aren't really the same as your grandparents ate.