This is far better a debate format for two people who can’t stand each other. Otherwise, it an academic exercise.
“...for two people who can’t stand each other...”
Who are the two people?
(As I understand it, Cain and Gingrich have great respect for one another.)
Wow, have you ever watched a L-D debate? It is a brilliant format for intelligent people to point out and hone their agreements and differences and the reasons for those differences without the "gotcha" moments. If they act like they "can't stand each other," they come across as shrill, childish, and petty. If all you want is a show, watch wrestling.
If I could pass one election law, it would be that the major party candidates had to participate in at least six hours of televised L-D debates. That would fix many of the problems with campaign finance, MSM favoritism, etc.