They also employed legal notions to bear upon the political question, such as: 'right' (haqq), 'inheritance' (irth), 'kinship' (qarabah), and priority of paternal cousins over daughter's sons. Jurisprudence (fiqh), speculation, literature and theology were all used in this political battle, and some heretical theological sects emerged which put forward certain concepts and expressions that were employed in it. However, bitter experience had proved that these repressive measures not only failed, but further nourished the propagation and continuance of revolutionary trends which rejected the 'Abbasid regime. Al-Ma'mun realized the futility of this method in facing the problem caused by the principle of nass.
Maadui, n.k. na baadhi ya wakati kulitokea watu amabo kidhahiri walidai kuwa wamewaamini Mitume hiyo, lakini kwa kweli walikuwa ni wanafiki, yaani wakiwa pamoja na Mitume hudai kuwa wao wanawaamini Mitume, na wakiwa pamoja na makafiri hudai kuwa wako pamoja na makafiri, hivyo imani zao zilikuwa ni dhaifu, na walisababisha madhara zaidi katika dini ya Kiislamu kuliko hata hao makafiri, katika sehemu hii tutatoa mifano na mwenendo waliokuwa wakitumia watu kama hao:-