If you can do that, you've kicked the habit. If you're in the minority Harmony is sweet. It's almost indispensable to teamwork. But harmony is a matter of atmosphere-friendliness rather than hostility. It doesn't mean that members always agree.
New ideas stick in the craw.
Old ideas seem sacred. Emotions and personalities trample logic. Therefore, it's a duty of a good committee member to question everything silently and to speak when answers continue to elude him. Most of us shrink a little from asking such questions. We know our colleagues prefer to feel that everyone agrees with them.