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Volume 48 - June 1981

Contents

Page 3 of 4

Discussion

Research Article

  • Information Theory and Redundancy

  • Derek Partridge
  • Published online by Cambridge University Press:
    01 April 2022, pp. 308-316

  • This paper argues that Information Theoretic Redundancy (ITR) is fundamentally a composite concept that has been continually misinterpreted since the very inception of Information Theory.

    We view ITR as compounded of true redundancy and partial redundancy. This demarcation of true redundancy illustrates a limiting case phenomenon: the underlying metric (number of alternatives) differs only by degree but the properties of this concept differ in kind from those of partial redundancy.

    Several other studies are instanced which also imply the composite nature of ITR. We thus provide broadly based but particular support for earlier generalized suggestions that it is the underlying calculus of Information Theory rather than the ill-named concepts themselves that provides something of a unitary language for the description of phenomena.

Book Reviews

Discussion

Research Article

  • What Price Substitutivity? A Note on Probability Theory

  • Hugues Leblanc
  • Published online by Cambridge University Press:
    01 April 2022, pp. 317-322

  • Teddy Seidenfeld recently claimed that Kolmogorov's probability theory transgresses the Substitutivity Law. Underscoring the seriousness of Seidenfeld's charge, the author shows that (Popper's version of) the law, to wit:

    If (∀D)(Pr(B,D) = Pr(C,D)), then Pr(A,B) = Pr(A,C),

    follows from just

    five constraints on Pr of the most elementary and most basic sort.

Book Reviews

Discussion

Other

Book Reviews

Discussion

Other

Book Reviews

Front matter

  • PSA volume 48 issue 4 Cover and Front matter

  • Published online by Cambridge University Press:
    01 April 2022, pp. f1-f3
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Book Reviews

Page 3 of 4