We consider two variants of morphological case: structural case (such as ac
cusative, ergative, or dative), which is encoded by abstract case features
reflecting the semantic ranking of arguments, and semantic case (such as in
strumental or directional), which encodes an additional semantic relation t
o be licensed by the meaning of the verb. Individual verbs may be lexically
marked for either structural or semantic case. We show how a correspondenc
e-theoretic approach can successfully describe the various patterns of stru
ctural case found in German. We then discuss instances of double object whe
re structural case and semantic case compete with each other: under certain
circumstances semantic case is favored, while under other circumstances st
ructural case is favored. We mainly consider two scenarios, described by th
e respective rankings of STRUCTURAL CASE (which requires all objects to be
realized by a structural case) and UNIQUENESS (which restricts a structural
case to occur at most once in a clause). In particular, we analyze the dif
ferent options for structural vs, semantic case in the dialects of Quechua.
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