We understand by this term works produced by persons unscathed by artistic culture, where mimicry plays little or no part (contrary to the activities of intellectuals)
so basically it can only be done by isolated mentally ill people?! if you think about it - its a paradox.
if you look up the very definition of artistic culture you will get the definition of "The Arts" ( imagine dramatic chipmunk meme sound at this part )
The arts represent an outlet of expression, that is usually influenced by culture and which in turn helps to change culture. As such, the arts are a physical manifestation of the internal creative impulse.
so while "culture" may be far fetched for an asylum environment but yeah it has its rituals and all that you could consider it as that. even if not - the moment the mentally ill decides to draw he/she will affect the environment. change the rituals ( caretakers will provide materials for art which they didnt do before most likely ). hence the first phrase of the definition of outsider art cannot be fullfilled and if only once in a lifetime.
does not make sense to me but interesting to think about