I think the "trick" elements of it may have been over emphasized by my blog relative to how I really do this question. Ultimately, the core of the question is

I think the "trick" elements of it may have been over emphasized by my blog relative to how I really do this question. Ultimately, the core of the question is hard enough, and does plenty to figure out who's a really good communicator. Just explaining something in essential form is actually quite hard.