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Original scientific paper

Acts of Requesting in Dynamic Logic of Knowledge and Obligation

Tomoyuki Yamada orcid id orcid.org/0000-0003-3170-4054 ; Hokkaido University, Sapporo


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Abstract

Although it seems intuitively clear that acts of requesting are different from acts of commanding, it is not very easy to sate their differences precisely in dynamic terms. In this paper we show that it becomes possible to characterize, at least partially, the effects of acts of requesting and compare them with the effects of acts of commanding by combining dynamified deontic logic with epistemic logic. One in- teresting result is the following: each act of requesting is appropriately differenti- ated from an act of commanding with the same content, but for each act of request- ing, there is another act of commanding with much more complex content which updates models in exactly the same way as it does. We will also consider an application of our characterization of acts of requesting to acts of asking yes-no questions. It yields a straightforward formalization of the view of acts of asking questions as requests for information.

Keywords

request, command, yes-no question, dynamified deontic logic, epis- temic logic

Hrčak ID:

84301

URI

https://hrcak.srce.hr/84301

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