The doubtful/gray areas are those issues that aren’t clearly halal or haraam, they are instead mustahab (recommended), mubah (indifferent), or makruh (disliked). For example, some people will label smoking/hookah as haraam, others as makruh. And even if it’s makruh, they’ll still think it’s ok to smoke.
Ummm, is Jimmy crushing on RV?