I’d slightly rephrase that as ”...in which both sides have arguments that a non-expert might be convinced by...”—there’s no barrier to such a problem arising even where there are no inherently good arguments at all on one side, such as the MMR-autism scare.
Your last question is of towering importance.
I’d slightly rephrase that as ”...in which both sides have arguments that a non-expert might be convinced by...”—there’s no barrier to such a problem arising even where there are no inherently good arguments at all on one side, such as the MMR-autism scare.
This was exactly the issue that originally motivated this question for me.