I've thought this as well - not necessarily that it would require its own forum, but simply a formal debate of the "Be it resolved that _______" and a team that argues in the affirmative and one that argues in the negative. There would be a moderator (a debate moderator) and three judges. Only after the formal presentations would everybody else be allowed to ask questions of the debaters.I think it would be a good idea to have a "Debate" forum where people could schedule one on one (Or two on two) debates where they would debate a certain topic between those two posters.
I don't know if anything like this has been done in the past or is currently going on in any of the non-Colosseum forums. It would be an interesting experiment to try in OT.
I've had to argue some issues that I truly found absurd... such as the affirmative position that history should not be taught in schools.
