Other sources beyond Vessiere’s study include: Multiplying models: Personal identity, dissociation and the possibility of healthy multiplicity by Gale, Lindsey and Alterity: Learning polyvalent selves, resisting disabling notions of the self by Walker, Wayland. We can gather from these that healthy multiplicity is indeed A Thing that happens. What we -cannot- gather is what causes it. To label all non-DID or DDNOS systems as imitation systems or BPD is a huge oversight and logically unsound.