Originally posted by Basilissa
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I am not sure if you can have 100% certainty of causation. It is often said that cigarette smoking causes lung cancer. There is a correlation of course and the probability of causation is high especially in the western countries. However, I know several people in Eastern Europe who were heavy smokers, but who have not died of lung cancer, and some, when they did die, died from some other cause, not lung cancer.


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