In the year of 1929, John Dewey had the meaning of "public" as a group of people who answer the same problem. This means that this meaning is about problems (situational). This definition of "public" with "problem" is so misunderstood that people made a whole new learning place, called as "the idea of the public being about problems" (situational theory of publics) created by James E Gruning, who was so into "the idea of the public being about problems” that he also thought of “the idea of the public "not" being about problems", and so made sets that put the ideas of the meaning of public in order. This includes "the idea of a public without a problem" (nonpublics), "the idea of public with a problem" (latent publics), and "the idea of public who know they have a problem" (active publics).