An Application Specific Informal Logic for Interest Prohibition Theory
  Interest prohibition theory concerns theoretical aspects of interest prohibition. We attempt to lay down some aspects of interest prohibition theory wrapped in a larger framework of informal logic. The reason for this is that interest prohibition theory has to deal with a variety of arguments which is so wide that a limitation to so-called correct arguments in advance is counterproductive. We suggest that an application specific informal logic must be developed for dealing with the principles of interest prohibition theory. 
J. A. Bergstra, C. A. Middelburg
q-fin.GN