What term describes a lack of agreement that may arise in a discussion?

The term that best describes a lack of agreement that may arise in a discussion is dissension. Dissension specifically refers to disagreement or variance in opinions, particularly among a group of people. It highlights the conflict or contentiousness that can occur during discussions when individuals hold differing views or beliefs. This term captures the essence of communication breakdowns where consensus is not reached, leading to tension among participants.

In contrast, disarray typically refers to a state of disorganization or confusion, but it does not inherently convey disagreement among individuals. Disruption suggests breaking or interrupting the flow of something, which may involve a lack of agreement but is broader in scope. Distraction is related to diverting attention from the main topic or focus, but it does not specifically address the concept of disagreement. Therefore, dissension is the most precise term for a lack of agreement in discussions.