Well, I'm mostly using these on people who haven't read much or any philosophy, so those would work. That said, I think that a lot of smart people can get to the right answer even when there isn't any consensus in the philosophical community.
I'd settle for a well-thought-out answer, even if it's not the one I agree with.
I'm looking for hard philosophical questions to give to people to gauge their skill at philosophy.
So far, I've been presenting people with Newcomb's problem and the Sleeping Beauty problem. I've also been presenting them with contrarian opinions and asking them to evaluate them, and I have a higher opinion of them if they avoid just icking away from the subject.
What other problems should I use?