 According to Kilwardby, the modal character of the predication in the conclusion of the perfect first figure syllogism follows from the first premise, which involves the whole syllogism in accordance with the dici de omni et nullo (Lagerlund 2000, 41–42). The premises and the conclusion in uniform necessity syllogisms are necessary per se. In mixed first-figure syllogisms with a major necessity premise and a minor asertoric premise, the non-modalized premise should be simpliciter assertoric, i.e., a necessarily true per se predication. Similarly, in mixed first-figure syllogisms with contingent major and assertoric minor premises, the assertoric premise must be simpliciter assertoric, but this time the criteria are that the predicate belongs to the subject per se, invariably or by natural contingency (Notule libri Priorum 15.255–301; 20.706–736).