The purpose of a meeting will always be to arrive at some mutual conclusion which can be most efficiently achieved by discussing, debating and deciding the outcome together. Otherwise, why have a meeting?
It follows then, that whoever is leading the discussion, debate and decision-making has a responsibility for ensuring fair and open coverage of everyone’s views and all available information. This means the leader must certainly behave impartially, whatever his/her personal opinions are on the subject.
Not always easy. And it can be tempting for a senior, influential Chair to allow their own views (consciously or unconsciously) to dominate. In some situations, you might genuinely believe this is the “right” thing to do. How do I fairly chair a balanced discussion when I already have a strong preconceived commitment to a definite outcome?