Rooms full of people in meetings watch the top three people and take their lead.
The most prominent or outspoken person is the leader, people listen to what he's saying. Then they wait to see if there *is* a second most active person in the discussion, and if so, whether that person agrees or disagrees with the leader. Then they take their queue from the third participant.
If the first two people disagree, the room watches whether the third person leans in one direction or another. If the first two person agree, but others do not, they refrain from commenting if the third person *also* agrees.