The quiddity's being qualified in this way is something that...

The quiddity's being qualified in this way is something that only attaches to the quiddity after it has become known in the first place, so it is a second-order [consideration] ( fî d-darajati th-thâniya ). If these considerations are investigated, not absolutely, but rather with respect to how it is possible to pass correctly by means of them from the known to the unknown, that is logic.

So its subject matter is certainly the secondary intelligibles under the consideration mentioned above (Râzî (1381 A. H.) Mulakhkhas 10.1-10.8). In identifying the secondary intelligibles, Avicenna is able to place logic within the hierarchy of the sciences, because it has its own distinct stretch of…