I agree with this... you're asked to do something and the interviewer is purposefully holding back information wanting you to come out and ask about it. That feels a bit tricky to me.
I do agree, the real job would habe to deal with ambiguity. But this is the interview. The interviewee has a completely different mindset going in. "Playing games" to see how they respond...that's for the likes of the NSA, CIA, etc.
"We can't find good candidates"? Nah. Your hiring process sucks. Get a mirror.
