By Andrzej Wiśniewski (auth.)

ISBN-10: 9048145953

ISBN-13: 9789048145959

ISBN-10: 9401584060

ISBN-13: 9789401584067

This ebook is a research within the good judgment of questions (sometimes referred to as erotetic logic). The significant subject matters in erotetic good judgment were the constitution of questions and the question-answer courting. This e-book does not overlook those difficulties, yet a lot of it truly is focussed on different concerns. the most topic is the logical research of definite kin among questions and the contexts in their visual appeal. And our objective is to intricate the conceptual gear of the inferential method of the common sense of questions. Questions are requested for lots of purposes and for various reasons. but, prior to a question is requested or posed, a questioner needs to arrive at it. in lots of instances arriving at a question resembles coming to a end: there are a few premises concerned and a few inferential inspiration approaches occur. If we agree end needn't be "conclusive", we may well say that typically questions can play the function of conclusions. yet questions may also practice the function of premises: we regularly go from a few "initial" query to a different query. In different phrases, there are inferential idea procedures - we will name them erotetic inferences - during which questions play the jobs of conclusions or conclusions and premises. The inferential method of the good judgment of questions focusses its consciousness at the research of erotetic inferences. This publication contains 8 chapters.

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The letters u and v, possibly with indices, will be syntactical variables which represent closed terms. The letters A, B, C, D, with or without indices, will be metalinguistic variables for d-wffs. An expression of the metalanguage having the form Axi, ... Xi. refers to the sentential functions whose free variables are exactly the (explicitly listed) variables Xii' .. , Xi. ' Whenever an expression of the form Axil . Xi. is used, it is assumed that the variables Xi" ... , Xi. are distinct. The letters P, R, possibly with indices, will be metalinguistic variables represent ing predicate symbols.

We shall call this relation erotetic implication. We intend to define erotetic implication in such a way that the following conditions will be satisfied by any question Q* implied by a question Q on the basis of a set of declarative formulas X: If the question Q has a true direct answer and all theformulas in the set X are true, then the question Q* must have a true direct answer. ) For each direct answer B to the question Q* there exists a nonempty propersubset Y of the set of direct answers to the question Q such that Y must contain at least one trueanswer if B is trueand all theformulas in X are true.

The aim of a game is to find the correct answer to some principal or initial question ; in the simplest cases an interrogative game is played by means of a first-order language on a given model of this language. There are two kinds of moves: interrogative moves and deductive moves. In an interrogative move the Inquirer addresses some auxiliary question to the Answerer, who is supposed to answer it as best (she, it) can. In a deductive move, the Inquirer draws a deductive conclusion from some previously accepted premise(s) and/or the answers so far obtained .

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The Posing of Questions: Logical Foundations of Erotetic Inferences by Andrzej Wiśniewski (auth.)

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