Draft:Tenth Man Rule

The Tenth Man Rule is a common sense tactic that states that whenever nine people agree that something is true, a tenth person should defend the opposite thesis (even if they do not agree with it) to be prepared for an unlikely event or thesis.

Details
Of uncertain origin, it was popularized in the film  World War Z (2013), based on the  novel of the same name by Max Brooks. In the film, it is claimed to be a practice used by the Israeli government. Although the Tenth Man Rule does not explicitly exist in the Israeli government, they do have a culture of analyzing unlikely theses, even having an office called the «devil's advocate» office where theses opposite to those accepted are analyzed.

It can be a feasible common sense tactic to implement, to avoid the problems of groupthink, argumentative bias and other thinking errors. The rule helps in better decision-making, accident prevention and the permanent search for true knowledge by questioning and contrasting it with opposing arguments. Although the specific rule is that after 9 people a tenth person must defend the opposite thesis, it is not necessary to have 10 people, but rather in advance in a group of 3 or 4 one of them must take the dissenting opinion, and by extension one must question the knowledge that is considered true from time to time.