The best reason to assign roles in a group discussion is, so that the group can look for strengths and weaknesses in the ideas. When doing a group discussion, each member of the group should do his or her part and one of the tasks of being a member is to contribute ideas for the discussion. All members of the team are given the right to decide whether the ideas compiled are relevant or not.
so that the group can look for strengths and weaknesses in the ideas
Explanation:
In a group discussion having roles its important so some people are in favor other agaisnt a certain topic, this helps find plotholes and weaknesses in the different topics, this can strenghten the argument for the whole group once the session is finished and they can find the strongest arguments in favor or agaisnt the subject.
