Well, it’s just as easy as varying smoking directly, which would also work to identify a smoking->cancer effect.
Without experimentation, there is no way to distinguish between the world of smoker’s lesion and the world of carcinogenic cigarettes.
Well, it’s just as easy as varying smoking directly, which would also work to identify a smoking->cancer effect.
Without experimentation, there is no way to distinguish between the world of smoker’s lesion and the world of carcinogenic cigarettes.