This book constitutes a quest for discourse and pragmatic features responsible for so-called optional grammatical choices. In an attempt to adduce new evidence for the assumption that, in order to capture adequately the reasons for the choice of various grammatical devices, a multi-variable model is necessary which could account for the development and the functioning of grammaticalized ethno-linguistic features in a variety of languages. The main hypothesis put forward is that, limited as they are by the possibilities of a given language, the choices open to speakers when reconstructing...