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Veridicality and sets of alternative worlds

On embedded interrogatives and the complementizers that and if

Abstract

This paper explores three related phenomena. First, not all embedded formal interrogatives (i.e. clauses introduced by if or whether) have the function of an indirect question. Second, the complementizers if and that may occur in identical syntactic contexts. Third, if-clauses may be licensed by certain (discourse) semantic factors, like negation, modality, and also verum focus, where otherwise that-clauses are preferred. The approach taken is based on epistemic logic, especially on the notion of relativized veridicality, the notion of possible worlds and the formal semantics of the complementizers that and if.

Abstract

This paper explores three related phenomena. First, not all embedded formal interrogatives (i.e. clauses introduced by if or whether) have the function of an indirect question. Second, the complementizers if and that may occur in identical syntactic contexts. Third, if-clauses may be licensed by certain (discourse) semantic factors, like negation, modality, and also verum focus, where otherwise that-clauses are preferred. The approach taken is based on epistemic logic, especially on the notion of relativized veridicality, the notion of possible worlds and the formal semantics of the complementizers that and if.

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