Ratio 34 (2):100-108 (2020)

Brett Karlan
University of Pittsburgh
Which rules should guide our reasoning? Human reasoners often use reasoning shortcuts, called heuristics, which function well in some contexts but lack the universality of reasoning rules like deductive implication or inference to the best explanation. Does it follow that human reasoning is hopelessly irrational? I argue: no. Heuristic reasoning often represents human reasoners reaching a local rational maximum, reasoning more accurately than if they try to implement more “ideal” rules of reasoning. I argue this is a genuine rational achievement. Our ideal rational advisors would advise us to reason with heuristic rules, not more complicated ideal rules. I argue we do not need a radical new account of epistemic norms to make sense of the success of heuristic reasoning.
Keywords reasoning  rationality  heuristics
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Reprint years 2020, 2021
DOI 10.1111/rati.12291
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Accuracy and the Laws of Credence.Richard Pettigrew - 2016 - Oxford University Press UK.
Inference to the Best Explanation.Peter Lipton - 1993 - Routledge/Taylor and Francis Group.
Bayes or Bust?John Earman - 1992 - Bradford.

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