In this paper, I try to draw attention to many patterns which anaphors in the usual sense (pronouns) and another N share. Both can be used as bound variables and the syntactic configurations govern the possibility of binding in the same way. However, unlike pronouns, another N has lexical content and shows scope ambiguity. These observations lead us to recognize two kinds of indices –anaphoric and categorial. The idea is implemented in a categorial theory of binding, which assumes transparent model-theoretic interpretation. Finally, it is suggested that some remaining problems for the binding of another N in donkey sentences be treated on the discourse level, as in the case of pronouns
