Perhaps Dave is suing his employer for compensation because he developed cancer after working with material which was later found to be carcinogenic. Dave's emp

Perhaps Dave is suing his employer for compensation because he developed cancer after working with material which was later found to be carcinogenic. Dave's employer argues that since Dave was a smoker, his smoking caused his lung cancer, and they are not liable. Dave admits thats smoking causes lung cancer, but argues that it did not cause his lung cancer.