Tûsî is a particularly interesting logician in terms of his historical affiliations. He had come to Avicenna's Pointers by way of Râzî's students, but he developed a deeper respect for Avicenna's formulations than any of his contemporaries. Râzî's hostility in characterizing the Avicennan exposition in Pointers is confronted by Tûsî in Solution to the Difficulties of Pointers. The nature of Tûsî's response to Râzî is generally taken to be entirely negative—he relayed a description of Râzî's work as being “a butchery, not a commentary”—but in fact Tûsî acknowledged the value of Râzî's work. The rhetorical engagement with Râzî is really part of a broader campaign to defend not only Avicenna's logic but also his exposition of that logic. To take one example: Avicenna's account of different kinds of absolute proposition had long raised questions among post-Avicennan logicians. Tûsî explains why Avicenna explores it the way he does: