 Other elements recognized in the BLAST definition are notable for the extent to which they vary from one informal logic to another. The different theoretical backgrounds that inform different systems of informal logic (B in the BLAST definition) are of special note, for they reflect the extent to which the development of informal logic has been a search for new and novel methods of analysis that can be applied to real life arguing. In a particular case, this search may end in Aristotle, in feminist theories of argument, in rhetoric, in dialogue theory, in speech communication, in formal logic, or in some combination of these and/or other theoretical points of view. 