It seems the devs don't want it changing too quickly to eliminate accidental changes. (goodereader.com)
For him, too, process is constitutive for the entity itself; he explicitly cites generation as the process constitutive for the entity, and distinguishes it from the processes that effect merely accidental changes in the entity (De Gen. et Corr. (religion-online.org)
They exist independently of my experience; they endure throughout the process of accidental changes, and, therefore, they seem to be more real, more concrete than the secondary qualities. (religion-online.org)