But perhaps most important of all, having too many people on a team makes team dynamics during meetings and other decision-making events almost impossible. That's because a good team has to engage in two types of communication in order to optimize decision making, but only one of these is practical in a large group. According to Harvard's Chris Argyris, those two types of communication are advocacy and inquiry. Basically, advocacy is the statement of ideas and opinions; inquiry is the asking of questions for clarity and understanding. When a group gets too large, people realize they are not going to get the floor back any time soon, so they resort almost exclusively to advocacy. It becomes like Congress (which is not designed to be a team) or the United Nations (ditto).