Actually, one danger of groupthink is that it causes team members to come to agreement prematurely—by discounting minority views. Instead of explaining that groupthink can seriously damage a team's ability to agree, you would want to appoint a team member to challenge the assumptions and conclusions of the majority. By bringing in a "devil's advocate," you help ensure that dissenting views are represented in the team and force majority members to deal with facts and ideas that conflict with their own. Providing a devil's advocate is a powerful antidote to groupthink.