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On degrees of justification

Betz, Gregor (2009) On degrees of justification. [Preprint]

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    Abstract

    This paper gives an explication of our intuitive notion of strength of justification in a controversial debate. It defines a thesis' degree of justification within the bipolar argumentation framework of the theory of dialectical structures as the ratio of coherently adoptable positions according to which that thesis is true over all coherently adoptable positions. Broadening this definition, the notion of conditional degree of justification, i.e.\ degree of partial entailment, is introduced. Thus defined degrees of justification correspond to our pre-theoretic intuitions in the sense that supporting and defending a thesis t increases, whereas attacking it decreases, t's degree of justification. Moreover, it is shown that (conditional) degrees of justification are (conditional) probabilities. Eventually, the paper explains that it is rational to believe theses with a high degree of justification insofar as this strengthens the robustness of one's position.


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    Item Type: Preprint
    Keywords: degree of justification, partial entailment, argumentation, robustness
    Subjects: General Issues > Confirmation/Induction
    Depositing User: Gregor Betz
    Date Deposited: 22 Sep 2009
    Last Modified: 01 Oct 2011 10:12
    Item ID: 4904
    URI: http://philsci-archive.pitt.edu/id/eprint/4904

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