"someone"-exactly.......it means tat there r other factors...wat if the cig smokers tat got cancer got other factors as well...other factors tat might contribute tat they share.......kinda like their lifestyle.....like to sleepin late, poor eatin habit, sedentary livin.......i mean maybe smokers share a certain lifestlye tat contribute to the cancer.......or maybe there r some type of personality tat make prone to cancer....not merely the cigs tat causin the cancer.......because there r people who smoke n dont get cancer...........