What principle does not represent one of the inner points of the DECA diamond?

The principle that does not represent one of the inner points of the DECA diamond is the encouragement of community service. The DECA diamond is structured around four inner points that encapsulate the core components of the DECA experience: integration with classroom instruction, application of learning, promotion of competition, and the development of leadership skills.

While community service is an important and valuable aspect of many organizations and can complement DECA's initiatives, it does not fit within the specific framework of the DECA diamond's focus. The other three concepts directly relate to educational engagement and competition in business environments, which are central to DECA's mission of preparing emerging leaders and entrepreneurs. Therefore, community service, though beneficial, lies outside the main pillars outlined in the DECA diamond.