I saw the Gingrich/Cain Lincoln-Douglas style debate. And I saw Cain have to punt twice when the question asked required a more substantive response. It showed the lack of depth and seriousness if Cain and was the only big takeaway from the entire debate.
I'll just assume you went into it with an open and objective mind. I thought both Cain and gingrich gave well founded, conservative, and practical answers in their discussion.
Cain took a hit the other day on a foreign policy question. he's taken several big hits on foreign policy. It's his greatest area of weakness. Foreign policy is also a weakness for Perry, Romney, Gingrich, Huntsman, Paul, Bachmann, Johnson and Rohmer. Candidates have to sell themselves. You don't sell your product by pointing out its biggest drawbacks.