There are discussions, some very lively, some even changing to flame wars and non productive in most cases. And there are discussions among grown-ups who have something in common: the goal to improve a non optimal situation. We all know such discussions and we feel best when participating in such because we do it to achieve something for all.
And there are discussions where somebody is in the lead and puts his opinion, his rules and his point of view above logical or technical arguments. “Do as you are told or else..” If this happens at the very start of a discussion I call it a “non-discussion“. It does not solve the problem at hand, it does nothing to improve the situation or fix an issue. The only thing it does is giving the leader a nice warm feeling that he has proven his position and enforced rules.