No.
What is the difference between "potential" and "is"?
One is maybe and the other is for sure.
Eating and driving may cause an accident, but not always.
There is no way secondhand cigarette smoke is any good.
Ahhh, but here's the thing. I have smoked for over 30 years and am still disgustingly healthy. (I quit smoking three years ago.) My grandmother smoked and she lived to be 103. For sure? Nawww. It depends on your genetic disposition.

