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Ockham's Razor

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Abstract Ockham's Razor is the philosophical principle that entities or assumptions should not be introduced unnecessarily. This is often interpreted as stating that one should seek the simplest explanation for a phenomenon. The purposes of this note are to introduce some of the different formulations of the Razor and the controversy surrounding it, to explore the use of Ockham's Razor as a scientific tool, and to draw connections with statistical inference, both frequentist and Bayesian. The note starts with a brief introduction to the life of William of Ockham, to whom the Razor is traditionally and popularly attributed. There is some controversy regarding the use of Ockham's Razor as an inferential tool; this seems to center on the meaning of ‘simple explanation’ and the issue is explored. Uses of the Razor in science, in statistical model selection, and in Bayesian inference are examined. Copyright © 2010 John Wiley & Sons, Inc. This article is categorized under: Statistical and Graphical Methods of Data Analysis > Modeling Methods and Algorithms Statistical Models > Model Selection

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Statistical and Graphical Methods of Data Analysis > Modeling Methods and Algorithms
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