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 ::The purpose of the category is to connect a great many articles to the fundamental categories in an organized way. It shows the various attempts to use models in reasoning things out in many and varies subject areas. As logic is universally applicable, these connections are often taken for granted. However, to try to portray a lot of these things as somehow ""within"" logic or mathematics will not go over very well. So all of these things can be seen as instances of the concept in the article interpretation (logic), but it would be inappropriate to call the category a ""logic"" category.   "