Should I flag answers consisting only of “No” or “Yes”?
Assuming the correct answer to the question is
What is the correct etiquette when seeing these answers in /review ?
Voting down doesn't like the right option (assuming the answer is correct) yet voting up doesn't right either as trust is placed on the user who answered the question that he knows what he is talking about (yet no information as to why was added)
One can also leave it in /review with the hope that someone with the expertise will edit the question with "why" it is no?