First we have to determine the type of individual we are dealing with. A true cynic will not be moved no matter how much evidence you provide and they will double down on their position if challenged. Don't waste time with a cynic. A skeptic however, now there is a person that can be reached if dialog can be established. A person that is just skeptical in the face of unfamiliar information is worth the investment of time. But, they must come around at their own speed and they don't have to agree with everything - but awake just enough to get them to pivot in their behavior. That pivot could mean saving their life. To save one life is to save the world.