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- consensus by simple majority: when a, b, and c appear in the creation. - consensus by enhanced majority: when a, b, c and also d appear in the creation. - consensus by absolute majority: when x, y and z appear in the creation. - consensus by imposing whatever the organization wants: to be used at will. - consensus by ignoring whatever resulted from the previous consensus: to be used when organization don't like the results of another consensus system.