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.Comment: 8 page