 It is also known that Gregory differed from Wodeham in the way he thought about “assenting to” and “dissenting from” such complexe significabilia, an issue which had occupied Chatton at length. Wodeham thought of assent pretty much as an act of the will (Bermon 2007, 319), that can contingently be added over and above a formed proposition. Gregory distinguishes two kinds of mental propositions: mental propositions that are not expressed in a given language, and mental propositions that are expressed in a given language and that derive from the first kind. For Gregory, Wodeham’s claim is true only of linguistic mental propositions (Bermon 2007, 343–344). For non-linguistic mental propositions, it is impossible to dissociate the formation and the acts of assent or dissent. Formation and assent are associated in such a way that Gregory can claim that assent is a mental utterance (Bermon 2007, 331).