Tbe next stage m tbe analysis is tbe construcbon of a borderline,
a contrary and a related case Like a model case,
these cases are developed to promote further understandmg
of the concept being discussed In accordance with
Wilson's (1966) suggesbon, an invented case has not been
used as sufficient instances are provided to clanfy tbe concept
Similarly an illegitimate case bas not been constructed
as Walker & Avant (1988) assert that such a case
IS only necessary when a meaning ofthe term is completely
different from all the others