Avicenna's doctrine on the subject matter of logic was not adopted by the majority of logicians who followed him (pace Sabra 1980: 757). Quite the contrary, Khûnajî claimed in the second quarter of the thirteenth century that the subject matter of logic was conceptions and assents, a claim which was energetically resisted by remaining Avicennan purists like Tûsî. A recent study has clarified what is at issue in this debate (El-Rouayheb 2012). 