In my experience, hierarchy (explicit/implicit) is necessary to conclude differences which are grey. In fact, there are cases where I have seen one side make th

In my experience, hierarchy (explicit/implicit) is necessary to conclude differences which are grey. In fact, there are cases where I have seen one side make their points logically enough that they are basically black & white and the other side sticking their guns saying "good points, but I think I would prefer to go ...". One might rightfully say the issue is deeper but we don't always have the luxury of choosing the most well fitting team. Somebody with the authority (granted/earned) has to step in and say "I have heard all sides and this is what we are going to do". Saves endless bickering over never ending e-mail chains.