 In the final section of Book I, Buridan formulates a series of general principles which follow from his proposed definition of consequence, such as that from the impossible anything follows (first conclusion; see (D’Ors 1993 and Normore 2015) on Buridan and the ex impossibili principle)), the principle of contraposition (third conclusion), and also many principles pertaining to the semantic properties of the categorematic terms in a consequence (see entry on medieval theories of properties of terms). Thus, here again we see that medieval theories of consequence never completely abandon the term perspective to adopt an exclusively sentential/propositional perspective.