 It is clear that if he was not also able to give a form of reality to the significata of true negative sentences, they could not be considered true, but, paradoxically, would be false, because they would be without any referent in reality. For this reason in the commentary on the Categories Paul distinguishes between the significate of a true sentence and the significate of a false sentence. Paul persists in thinking that if there is no adequate significatum in the world, that is, if there is not something complex to which the mental proposition refers in extramental reality, then the uttered sentence and the mental proposition are false, but he now accepts Burley’s idea that there are two different kinds of mental expressions, those which exist subiective in the intellect, as its acts of understanding, and those which exist obiective in it, as the direct objects of those acts of understanding. According to Paul, the mental proposition existing obiective in our intellect is the significatum ultimum et adaequatum of false propositions (In Cat., cap. de priori, fol. 136vb).