12 How to debate in groups?

Generally, there are pros and cons in the debate, and both have the theme of the debate. It is impossible for the 12 group to debate together. So there should be a division mode and a league mode. In the league, each team has to play once to decide the champion (sometimes there will be a draw), which requires enough time and energy to debate! The knockout is a group debate, the winner advances and finally decides the first place. Both modes should prepare arguments and topics, and then draw lots to decide the pros and cons!