Reasoning with `Unless´ counterfactual conditionals

This article tackles factual and counterfactual "unless" expressions such as "Virginia will not pass the exam unless she works harder" and "Virginia would not have passed the exam unless she had worked harder". "Unless" is a negative conditional that is semant...

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Main Authors: Csongor Juhos, Sergio Moreno-Ríos, Ana Cristina Quelhas, Juan A. García-Madruga
Format: Article
Language:English
Published: DIGITAL.CSIC 2009-01-01
Series:Psicológica
Online Access:http://www.redalyc.org/articulo.oa?id=16911991005
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author Csongor Juhos
Sergio Moreno-Ríos
Ana Cristina Quelhas
Juan A. García-Madruga
author_facet Csongor Juhos
Sergio Moreno-Ríos
Ana Cristina Quelhas
Juan A. García-Madruga
author_sort Csongor Juhos
collection DOAJ
description This article tackles factual and counterfactual "unless" expressions such as "Virginia will not pass the exam unless she works harder" and "Virginia would not have passed the exam unless she had worked harder". "Unless" is a negative conditional that is semantically equivalent to "if not". However, some authors have claimed that "unless" is more closely related to "only if" than to "if not". We report two experiments that compare conditional inferences from "unless" to "if-not'" and "only if" factual and counterfactual conditionals. The first experiment compared "not-A unless B" and "if not-B then not-A" and showed a difference between affirmative (i.e. B therefore A, A therefore B) and negative (i.e. not-B therefore not-A, not-A therefore not- B) inferences only for factual "if not". The second experiment compared "not-A unless B "and "A only if B" and showed no difference between affirmative and negative inferences for factual "unless" and "only if", whereas the affirmative inferences were higher for counterfactual "unless" and "only if". In both experiments latency results confirmed that inferences from "B to A" were faster than from "A to B" for "unless" and "only if". The implications of the results for the mental representations and processing of counterfactual "unless", "if not" and "only if" are discussed in the context of mental model theory.
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spelling doaj.art-f47fda7013d24078b6d0ece1136db0c92022-12-22T02:25:30ZengDIGITAL.CSICPsicológica1576-85972009-01-01302217243Reasoning with `Unless´ counterfactual conditionalsCsongor JuhosSergio Moreno-RíosAna Cristina QuelhasJuan A. García-MadrugaThis article tackles factual and counterfactual "unless" expressions such as "Virginia will not pass the exam unless she works harder" and "Virginia would not have passed the exam unless she had worked harder". "Unless" is a negative conditional that is semantically equivalent to "if not". However, some authors have claimed that "unless" is more closely related to "only if" than to "if not". We report two experiments that compare conditional inferences from "unless" to "if-not'" and "only if" factual and counterfactual conditionals. The first experiment compared "not-A unless B" and "if not-B then not-A" and showed a difference between affirmative (i.e. B therefore A, A therefore B) and negative (i.e. not-B therefore not-A, not-A therefore not- B) inferences only for factual "if not". The second experiment compared "not-A unless B "and "A only if B" and showed no difference between affirmative and negative inferences for factual "unless" and "only if", whereas the affirmative inferences were higher for counterfactual "unless" and "only if". In both experiments latency results confirmed that inferences from "B to A" were faster than from "A to B" for "unless" and "only if". The implications of the results for the mental representations and processing of counterfactual "unless", "if not" and "only if" are discussed in the context of mental model theory.http://www.redalyc.org/articulo.oa?id=16911991005
spellingShingle Csongor Juhos
Sergio Moreno-Ríos
Ana Cristina Quelhas
Juan A. García-Madruga
Reasoning with `Unless´ counterfactual conditionals
Psicológica
title Reasoning with `Unless´ counterfactual conditionals
title_full Reasoning with `Unless´ counterfactual conditionals
title_fullStr Reasoning with `Unless´ counterfactual conditionals
title_full_unstemmed Reasoning with `Unless´ counterfactual conditionals
title_short Reasoning with `Unless´ counterfactual conditionals
title_sort reasoning with unless´ counterfactual conditionals
url http://www.redalyc.org/articulo.oa?id=16911991005
work_keys_str_mv AT csongorjuhos reasoningwithunlesscounterfactualconditionals
AT sergiomorenorios reasoningwithunlesscounterfactualconditionals
AT anacristinaquelhas reasoningwithunlesscounterfactualconditionals
AT juanagarciamadruga reasoningwithunlesscounterfactualconditionals