Probability, confirmation, and the conjunction fallacy
| Abstract | The conjunction fallacy has been a key topic in debates on the rationality of human reasoning and its limitations. Despite extensive inquiry, however, the attempt of providing a satisfactory account of the phenomenon has proven challenging. Here, we elaborate the suggestion (first discussed by Sides et al., 2001) that in standard conjunction problems the fallacious probability judgments experimentally observed are typically guided by sound assessments of confirmation relations, meant in terms of contemporary Bayesian confirmation theory. Our main formal result is a confirmation-theoretic account of the conjuntion fallacy which is proven robust (i.e., not depending on various alternative ways of measuring degrees of confirmation). The proposed analysis is shown distinct from contentions that the conjunction effect is in fact not a fallacy and is compared with major competing explanations of the phenomenon, including earlier references to a confirmation-theoretic account. | |||||||||
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Branden Fitelson (2004). Discussion: Re-Solving Irrelevant Conjunction with Probabilistic Independence. Philosophy of Science 71:505-514.
Rodrigo Moro (2009). On the Nature of the Conjunction Fallacy. Synthese 171 (1).
Branden Fitelson (2002). Putting the Irrelevance Back Into the Problem of Irrelevant Conjunction. Philosophy of Science 69 (4):611-622.
Tomoji Shogenji (2012). The Degree of Epistemic Justification and the Conjunction Fallacy. Synthese 184 (1):29-48.
Jeanne Peijnenburg (2012). A Case of Confusing Probability and Confirmation. Synthese 184 (1):101-107.
Katya Tentori & Vincenzo Crupi (2012). How the Conjunction Fallacy is Tied to Probabilistic Confirmation: Some Remarks on Schupbach (2009). Synthese 184 (1):3-12.
Jonah N. Schupbach (2012). Is the Conjunction Fallacy Tied to Probabilistic Confirmation? Synthese 184 (1):13-27.
Vincenzo Crupi, Branden Fitelson & Katya Tentori (2008). Probability, Confirmation, and the Conjunction Fallacy. Thinking and Reasoning 14 (2):182 – 199.
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