If students disagree on feedback they are able to flag the response and bring it to their teacher's attention. Flagging assures that disputes between students can be resolved and brings a clear communication channel from student to teacher when disagreements occur. Students can flag both reviews and feedback reactions.
All flags made by students are available from the Flags tab inside assignments. The Flags tab shows all flags in a list on the left side and the selected flag on the right. For each unresolved flag it is possible to type in a response that will be sent to all students involved in the disagreement. If the question is a Scale or Yes / no question the teacher is able to overwrite the response for the answer. Here's a short video demonstrating how to resolve a flag: