Whether there are philosophically relevant connections between the expressive role of first-personal vocabulary and self-knowledge is an on-going debate in analytical philosophy. We will take a look at this debate by considering Ludwig Wittgenstein’s distinction between the two uses of ‘I’ as object and as subject and work out a further distinction within the subject-use of ‘I’. This relates to a problem that is inherent in Robert Brandom’s inferentialist program regarding the role of first-personal vocabulary. It can be shown that (...) subject-related aspects of language are necessary elements of inferentially articulated discourses—and not, like Brandom assumes, merely contingent features. (shrink)