 In general, Gregory’s answer to the problem of the intension and remission of forms (i.e. how to account for increases or decreases of a given quality) had a life of its own, since it circulated as a separate treatise, the Tractatus de intensione et remissione formarum corporalium (Loewe 2014, 274). Gregory argued that when intension occurs, a form of the same species is added to the subject, so that this new form and the preceding form now constitute a total form that has per se unity (Loewe 2014, 286, 316).