Legal and working as intended.
I found this question (and answer) when looking through the review queue, and there was already the standard "Don't give a one line answer" boilerplate on the given answer.
I was about to comment saying "hey, welcome, can you elaborate on this answer?" when I realized that with questions that boil down to "here's a situation, am I understanding the rules/etc correctly?" all the answers are going to boil down to either "no, and here's where you went wrong" - which is fine - and "yeah, you got it right"... But in the latter case, how do you elaborate on that?
How do we back up affirmative answers to "Am I understanding this correctly"-style questions?