Begging the question as a formal fallacy

Pawel Garbacz


The aim of this paper is to define the fallacy of begging the question in the formal language of the theory of consequence. Its main assumption claims this fallacy depends not only on the form of an argument but also on its context. On the ground of recent developments in informal logic the contextual theory of argumentation, suitable for formalisation, is propounded. According to it there are two relevant factors in argumentational contexts: beliefs of those who take part in argumentation and their inferential tools. Due to the variety of logical abilities of such participants two sets of definitions are submitted: simplified and extended. The ‘wickedness’ of this fallacy is explained by means of theorems involving definitions of probative efficiency of arguments.

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