(By Jakob Lesage): "This question is about phonologically independent pronouns only; indexes are irrelevant. Morphological case involves any type of case marking that is phonologically bound (affixes, clitics, tone, alternation, vowel lengthening, etc.). Core arguments are those having S, A or P function. If a bound marker distinguishes S from non-S pronouns, this counts as 1. Optional marking and marking with portmanteau morphemes (e.g. a marker both indicates that a noun phrase is plural and that it has P function) also count."