Just because those two things are poorly understood (and I think you massively underestimate how much we do know about both cancer and diet) doesn't mean that y

Just because those two things are poorly understood (and I think you massively underestimate how much we do know about both cancer and diet) doesn't mean that you should worry about solyent doubling your cancer risk. The same logic of having no good information to go on would have you simultaneously optimistic about it halving it. Missing knowledge doesn't define risk, it defines error bars.