Behavioral and Brain Sciences

Open Peer Commentary

“Nonmonotonic” does not mean “probabilistic”

Keith Stenninga1 and Michiel van Lambalgena2

a1 Human Communication Research Center, University of Edinburgh, Edinburgh EH8 9LW, United Kingdom

a2 Institute for Logic, Language and Computation, Department of Philosophy, University of Amsterdam, Amsterdam, 1012CP, The Netherlands.


Oaksford & Chater (O&C) advocate Bayesian probability as a way to deal formally with the pervasive nonmonotonicity of common sense reasoning. We show that some forms of nonmonotonicity cannot be treated by Bayesian methods.

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