Deviant cases are cases that defy current theories and common sense. They not have only extreme values on X or Y (like Intense cases) but defy current information about causal relations. John Gerring defines the case study method as an "intensive study of only one unit or a little range https://hbr-case-study-solution57295.blog2freedom.com/33425331/a-simple-key-for-case-study-writing-help-unveiled