be a moot point/question

be a moot ˈpoint/ˈquestion

be a subject that people disagree on or are uncertain about: It’s a moot point whether women or men make better drivers.A moot was a group of people who met to discuss questions of local or national law during the Anglo-Saxon period. A moot point was a question of law discussed at this meeting.
See also: moot, point, question