However, the series of decisions in more complicated systems can be difficult to follow, and it can be hard to understand how they result in a school classification. (americanprogress.org)
ICOs have been rife with fraud and are a fairly complicated system for people who are unfamiliar. (finance.yahoo.com)
Sometimes parents create very complicated systems that are hard for children to understand and difficult for parents to manage. (verywellfamily.com)