Expletive agreement, evidentiality, and modality in Logooli

We discuss and analyze two subject agreement markers in Logooli (Bantu,Kenya). We show that e- (class 9 subject agreement) and ga- (class 6 subjectagreement) give rise to a variety of apparently evidential or modal meanings whenthey occur in constructions translated with "expletive" subjects. We propose atreatment of the Logooli data following Matthewson, et al. (2007)'s and Rullmann,et al. (2008)'s choice function analysis of modality and evidentiality in St'át'imcets,and extend their original proposal to account for novel data in Logooli. We showthat these two morphemes occur only with verbs that introduce modal bases, andpropose that they differ from one another in the size of the subset of possible worldsthat their associated choice functions select from the modal base. This in turn resultsin different interpretations based on the size of the subset of worlds that they select,the speaker's ordering source, and the modal base provided by the verb.