Determining Maximal Entropy Functions for Objective Bayesian Inductive Logic.

According to the objective Bayesian approach to inductive logic, premisses inductively entail a conclusion just when every probability function with maximal entropy, from all those that satisfy the premisses, satisfies the conclusion. When premisses and conclusion are constraints on probabilities of...

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Publicado en:Journal of Philosophical Logic Vol. 52; no. 2; pp. 555 - 609
Autores principales: Landes, Juergen, Rafiee Rad, Soroush, Williamson, Jon
Formato: Artículo
Publicado: Springer Nature Apr2023
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Acceso en línea:Ver este registro en EBSCOhost
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      dt: Apr2023
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      pub: Springer Nature
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        10.1007/s10992-022-09680-6
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          Landes, Juergen
          Rafiee Rad, Soroush
          Williamson, Jon
        affil:
          Department of Philosophy "Piero Martinetti", University of Milan, Milan, Italy
          Dutch Institute for Emergent Phenomena (DIEP) and Institute for Logic, Language and Computation (ILLC), Amsterdam, The Netherlands
          Philosophy Department and Centre for Reasoning, University of Kent, Canterbury, UK
      su:
        Maximal functions
        Induction (Logic)
        Ergometry
        Predicate (Logic)
        Maximum entropy method
        Set functions
      sug:
        subj:
          Maximal functions
          Induction (Logic)
          Ergometry
          Predicate (Logic)
          Maximum entropy method
          Set functions
      keyword:
        Entropy
        First order logic
        Inductive logic
        Maximum entropy principle
        Probability logic
      ab: According to the objective Bayesian approach to inductive logic, premisses inductively entail a conclusion just when every probability function with maximal entropy, from all those that satisfy the premisses, satisfies the conclusion. When premisses and conclusion are constraints on probabilities of sentences of a first-order predicate language, however, it is by no means obvious how to determine these maximal entropy functions. This paper makes progress on the problem in the following ways. Firstly, we introduce the concept of a limit in entropy and show that, if the set of probability functions satisfying the premisses contains a limit in entropy, then this limit point is unique and is the maximal entropy probability function. Next, we turn to the special case in which the premisses are categorical sentences of the logical language. We show that if the uniform probability function gives the premisses positive probability, then the maximal entropy function can be found by simply conditionalising this uniform prior on the premisses. We generalise our results to demonstrate agreement between the maximal entropy approach and Jeffrey conditionalisation in the case in which there is a single premiss that specifies the probability of a sentence of the language. We show that, after learning such a premiss, certain inferences are preserved, namely inferences to inductive tautologies. Finally, we consider potential pathologies of the approach: we explore the extent to which the maximal entropy approach is invariant under permutations of the constants of the language, and we discuss some cases in which there is no maximal entropy probability function.
      pubtype: Academic Journal
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    language: English
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