GLOSS and the Department of Linguistics Colloquium November 7th, 3pm in 100 Agate Hall Zhuo Jing-Schmidt and Xinjia Peng East Asian Languages & Literatures University of Oregon The grammaticalization of disjunction: A history of constructional changes in Chinese Recent research on the typology of disjunction or disjunctive coordination suggests a conceptual connection between disjunction and irrealis constructions despite great morphosyntactic variability in the linguistic representation of disjunction across languages (Mauri 2008), confirming earlier observations of disjunctive coordinators being polysemous with irrealis meanings (Merlan 1982; Mous 2007). Scholars disagree, however, on how to treat the relationship between dedicated disjunctive coordinators and irrealis markers. Contra Mauri who makes a formal distinction between disjunction and irrealis marking, Pederson (2013) argues that disjunction is best analyzed as a specialized case of irrealis constructions. To better understand the relationship between disjunction and irreality in particular and the typology of disjunction in general, a diachronic perspective is necessary. Mithun (1988) and Haspelmath (2007) both point out the degree of grammaticalization as relevant to questions about the typology of coordination of which disjunction is a semantic sub-category. Haspelmath (2007:49) contends that the lack of dedicated coordination constructions in some languages may be seen as a “low degree of grammaticalization” rather than a complete absence of coordination. He argues that regardless of the relative degree of grammaticalization of coordination markers in individual languages, there is high cross-linguistic similarity and consistency in the source and trajectory of their grammaticaliztion. In this study we trace the source and trajectory of grammaticalization that led to the emergence of standard disjunction in Chinese, drawing implications both for the linguistic typology and for the diachrony of disjunction. Close examinations of historical corpus data revealed non-linear, gradual micro-changes triggered by a series of form-meaning reanalyses in construction-specific contexts, which is enabled by an isolating typology characterized by "precategoriality" at the lexical level and "hidden complexity" at the syntactic level (Bisang 2010:246). Specifically, the results (1) demonstrate the pivotal role of construction-specific form-meaning reanalysis in the micro-changes crucial to the emergence of disjunction, (2) reveal doubt and uncertainty as the historical conceptual source of disjunction, one which is easily obscured by orthographic differentiation, (3) confirm the conceptual and structural continuity from irrealis constructions to disjunctive constructions, (4) highlight frequency of use as a driving force in the emergence of novel constructional meanings and the entrenchment of constructional schemas, and (5) provide further evidence of the role played by an isolating typology in syntactic and categorial reassignment as a key step in grammaticalization.