If there were not a certain inherence of the haecceity to the atom, to matter, or even to form, there wouldn't be the possibility of finding a principle of individuation in these invoked realities. To seek the principle of individuation in a reality that precedes individuation itself is to consider individuation strictly as onto-genesis. The principle of individuation is then the source of haecceity.
Simondon identifies haecceity as the conceptual stake in all doctrines of individuation, arguing that the principle of individuation must be understood as the very source of haecceity rather than its pre-given substrate.
, Individuation in Light of Notions of Form and Information, 2020thesis