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Reasonable Doubt: An epistemological and psychological approach

Total Cost €


EC-Contrib. €






 ReaDoubt project word cloud

Explore the words cloud of the ReaDoubt project. It provides you a very rough idea of what is the project "ReaDoubt" about.

acted    verdict    acceptance    alternative    dynamics    philosopher    evidential    notion    hypotheses    seems    empirical    skills    decisions    unreasonable    fellowship    accepted    thoroughly    accepting    until    original    context    convicting    first    candidate    scenarios    relative    consequential    waiting    error    nature    rational    theoretic    contexts    jurors    evaluation    agents    confirmed    specialist    interdisciplinary    doctors    reasoning    hypothesis    threshold    independent    virtue    depending    supervision    assesses    degrees    acting    expert    exogenous    policy    makers    pieces    weighing    juror    defendant    shed    psychological    impermeable    norms    acquire    belief    decisional    purpose    reasonable    action    certainty    assumption    relies    option    psychology    epistemological    inaction    decision    trials    experimental    criminal    consequentiality    doubt    view    updates    benefits    confidence    light    degree    actual    complete    epistemic   

Project "ReaDoubt" data sheet

The following table provides information about the project.


Organization address
city: LONDON
postcode: WC1E 7HX

contact info
title: n.a.
name: n.a.
surname: n.a.
function: n.a.
email: n.a.
telephone: n.a.
fax: n.a.

 Coordinator Country United Kingdom [UK]
 Project website
 Total cost 183˙454 €
 EC max contribution 183˙454 € (100%)
 Programme 1. H2020-EU.1.3.2. (Nurturing excellence by means of cross-border and cross-sector mobility)
 Code Call H2020-MSCA-IF-2014
 Funding Scheme MSCA-IF-EF-ST
 Starting year 2015
 Duration (year-month-day) from 2015-09-01   to  2018-04-20


Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 


 Project objective

The purpose of this research is to shed light on the nature and dynamics of doubt and confidence in complex epistemic decision-making, through a study of the notion of reasonable doubt. While doubt is considered a rational virtue, waiting until complete certainty before accepting and acting upon a given hypothesis is unreasonable in many contexts. Given some evidential support for the hypothesis, the threshold beyond which acceptance rather than doubt is the reasonable option seems to depend on the decisional context (particularly the cost of a possible error): jurors in criminal trials should thoroughly consider alternative scenarios before convicting a defendant; doctors or policy-makers, however, may have to take action upon less strongly confirmed hypotheses, depending on the relative costs and benefits of action/inaction. Such a decision-theoretic view of reasonable doubt relies on the assumption that the consequences of an hypothesis are exogenous to the rational evaluation of its evidential support: one first updates one’s degree of belief in view of the evidence, and then assesses whether, given the context, the hypothesis is beyond reasonable doubt (i.e. should be accepted and acted upon). But is it the case that agents’ degrees of confidence in a hypothesis, and their weighing of various pieces of evidence, are impermeable to the decisional context? Is the juror’s actual belief independent from her having to bring a consequential verdict? This research aims to study the epistemological norms of reasonable doubt, taking account of the psychological reality of the agents’ reasoning. The main objective of the fellowship is to develop an original empirical research programme, testing the effects of the consequentiality of epistemic decisions on reasoning. This interdisciplinary project requires the candidate, an expert philosopher, to acquire experimental skills and knowledge in psychology, under the supervision of a specialist in the psychology of reasoning.


year authors and title journal last update
List of publications.
65535 Marion Vorms
La valeur probante du témoignage : perspectives épistémologique et juridique
published pages: 21-52, ISSN: 0241-2799, DOI:
Cahiers Philosophiques 142 2019-06-18
2018 Marion Vorms
Qu\'est-ce qu\'un doute raisonnable ?
published pages: , ISSN: 0035-3833, DOI:
Revue Philosophique de la France et de l\'Étranger 3 2019-06-18
2018 Philippe Huneman and Marion Vorms
Is a Unified Account of Conspiracy Theories Possible?
published pages: 49-72, ISSN: 2465-2334, DOI: 10.23811/54.arg2017.hun.vor
Argumenta 3(2) 2019-06-18

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