Recent studies on the representation of pronominal subjects in Brazilian Portuguese (BP) show the preference for overt indeterminate referential subjects. A "side effect" of the change in the Null Subject Parameter in BP is the progressive decline in the use of the standard strategies -structures with verb in the third person plural with a null subject and sentences with the pronominal generic clitic se -and the appearance of alternative strategies -an increasing frequency of sentences with overt nominative pronouns, especially você (you) and a gente (the people =we). Our purpose is to refine data of indeterminate subjects, collected from a sample of the speech of graduates from Rio de Janeiro.Our theoretical framework associates the Theory of Language Variation and Change (WLH, 2006(WLH, [1968)with the Principles and Parameters Theory (CHOMSKY, 1981(CHOMSKY, , 1995, which guides our analysis, from the hypotheses raised to the interpretation of the empirical data . Our results show that the different strategies are not in direct competition: they can be distributed in three diferent groups, according to a set of features they share, with respect to arbitrary and generic reference. At one extreme we find [+3rd person/+plural] category, which excludes the speaker, represented by the dying arbitrary clitic se and the pronoun eles (they), preferably overt. At the other extreme, we have a [+3rd person/+singular] category, which may or may not include the speaker and the addressee, represented by the generic clitic se, the zero strategy (with a 3 rd person singular verb form) and você (you), which is preferably overt. Finally, we have a [+1st person/+plural] category, which does include the speaker, represented by nós (we) and a gente (the people, the folks=we), with considerable advantage with respect to the former. The variation in each category disposed along our scale is not a stable phenomenon: each point has a strong competitor to represent each degree of indeterminate reference as the change progresses.