2005年10月21日: Richard Zuber, Semantics of Presupposition Inducers;
緒方典裕, Remarks on Kratzer's "OrderingPremise" Semantics of Modalities and Conditionals；
Eric McCready, Japanese Evidentials as Modals
[日本語  English]
 とき：
 2005年10月21日（金曜日）2:30pm
 ところ：
 東京大学教養学部／総合文化研究科（駒場Ｉキャンパス）18号館4階コラボレーションルーム2

発表１
 2:30pm
 講演者：
 Richard Zuber (CNRS, Paris)
 タイトル：
 Semantics of Presupposition Inducers
 概要：

It is wellknown that presupposition inducers can have different
categories, usually functional ones. This means that the relation of
presupposition can hold between expressions which are of
subsentential category. In this talk I It is wellknown that
presupposition inducers can have different grammatical proppose to
account for such nonsentential origins of presuppositions by
suggesting that presupposition inducers have as denotations specific
elements of relativised functional algebras. Functional algebras are
denotational algebras whose elements are functions (denotations of
functional expressions of the same category as a given presupposition
inducer). Functional algebras are relativised if their unit element 1
has been changed to a (and correspondingly the complement has been
relativised to a). For instance, to take the simplest case, if B is
the algebra of all properties, H is the property of being a human then
B(H) is the algebra relativied by H, that is the set of all
propertiers included in H in which H is a new unit element and the
complement C(X) of X is equal to the intersection of X' with H. One
observes that in such algebras all elements and their complements are
included in H (« entail » H) and thus H can be considered as a
(lexical) presupposition of any element of B(H). By generalising this
step to any functional category (where the relativising element will
be a constant function) and adding some additional constraints
(atomicity of algebras) we can account for the different categorial
status of presupposition inducers. Various examples of presuppositions
will be discussed in this context and the way of obtaining sentential
presuppositions from nonsentential ones will be indicated.

発表２
 3:30pm
 講演者：
 緒方典裕 (大阪大学)
 タイトル：
 Remarks on Kratzer's "OrderingPremise" Semantics of Modalities and Conditionals
 概要：

In the formal semantics of natural language, Kratzer's (1981; 1991)
"orderingpremise" semantics, which is a possible world semantics but
has two types of premise sets:"modal bases" and "ordering sources," is
the standard theory of modalities and conditionals, whereas in formal
logic, Kripke semantics and selectionfunction semantics are the
standard semantics of modal logics and conditional logics,
respectively. The naive question about Kratzer's "orderingpremise"
semantics is why it requires two types of premise sets simultaneously.
I will review Kratzer's "orderingpremise" semantics and try to
propose a simpler alternate, "multimodal premise" semantics.

発表３
 5:00pm
 講演者：
 Eric McCready (大阪大学)
 タイトル：
 Japanese Evidentials as Modals
 概要：

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