Nimbanese evolution was driven by the need to develop problem-solving skills in order to get food from the traveling plants of Nimban, such as the puzzleflower and the boyy'lo. As their society developed, competitive puzzle-solving skills were used to settle clan rivalries instead of the open warfare used by other primitive cultures. In competitions called muhndees, a clan would present its rivals with a logic puzzle or mathematical problem to be solved within a year. This interest in competitive logic led the Nimbanese to develop new ways to obfuscate and convolute meaning. Over the centuries, this led to the development of a highly complex bureaucracy. Rather than stockpiling weapons, rival clans would stockpile information and challenge one another with mountains of paperwork.