  For his extended version of Aristotelian logic he stated (MAL, p. 30) a set of three transformation rules which he claimed allowed one to construct all valid two-line categorical arguments. These transformation rules did not appear in LT.  It is somewhat curious that when it came to analyzing categorical syllogisms, it was only in the conclusion that he permitted his generalized categorical propositions to appear. Among the vast possibilities for hypothetical syllogisms, the ones   that he discussed were standard, with one new example added.