Txuss Martin

We argue that the commonly accepted existence of grammatical concepts such as Person (in the grammatical sense) or Tense poses an unrecognized challenge to the idea that human thought is independent of language. The argument is that such concepts identify aspects of linguistic expressions that also systematically define the contents and identity of the thoughts expressed in language. Since grammatical concepts are not known to have non-grammatical analogues, the thoughts in question do not appear to be non-linguistic in nature. We conclude that language is unlikely to be merely a medium in which independently constituted thoughts are expressed.

Like proper names, demonstratives, and definite descriptions, pronouns have referential uses. These can be 'essentially indexical' in the sense that they cannot be replaced by non-pronominal forms of reference. Here we show that the grammar of pronouns in such occurrences is systematically different from that of other referential expressions, in a way that illuminates the differences in reference in question. We specifically illustrate, in the domain of Romance clitics and pronouns, a hierarchy of referentiality, as related to the topology of the grammatical phase. Our explanation is based on extending the 'Topological Mapping Hypotheses' of Longobardi and Sheehan & Hinzen. The extended topology covers the full range of interpretations, from purely predicative to quantificational, to referential and deictic. Along this scale, grammatical complexity increases, and none of these forms of reference is lexical. This provides evidence for the foundational conclusion that the source of essential indexicality is grammatical rather than lexical, semantic or pragmatic.