[The grouping together of ideas and categories here is intentional: categories can be treated in the same way as ideas themselves. This is the idea of reification: abstract categories of ideas are made concrete through naming, and become like ideas. Because they are stand-ins for a whole category of ideas, they have the function of compressing the map of ideas within a person’s head. Thus, developing an intelligent taxonomy of ideas not only makes the matching process better (as above), but also makes search efficient (see http://ideamap.tk](http://ideamap.tk) for an example).