Authors
Jean Baratgin
Université Paris 8 (Alumnus)
Abstract
Psychological research on people’s understanding of natural language connectives has traditionally used truth table tasks, in which participants evaluate the truth or falsity of a compound sentence given the truth or falsity of its components in the framework of propositional logic. One perplexing result concerned the indicative conditional if A then C which was often evaluated as true when A and C are true, false when A is true and C is false but irrelevant“ (devoid of value) when A is false (whatever the value of C). This was called the “psychological defective table of the conditional.” Here we show that far from being anomalous the “defective” table pattern reveals a coherent semantics for the basic connectives of natural language in a trivalent framework. This was done by establishing participants’ truth tables for negation, conjunction, disjunction, conditional, and biconditional, when they were presented with statements that could be certainly true, certainly false, or neither. We review systems of three-valued tables from logic, linguistics, foundations of quantum mechanics, philosophical logic, and artificial intelligence, to see whether one of these systems adequately describes people’s interpretations of natural language connectives. We find that de Finetti’s (1936/1995) three-valued system is the best approximation to participants’ truth tables.
Keywords natural language connectives, three-valued truth tables, uncertainty, de Finetti’s tri-event, subjective probability
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DOI 10.3389/fpsyg.2018.01479
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References found in this work BETA

On Sense and Reference.Gottlob Frege - 2010 - In Darragh Byrne & Max Kölbel (eds.), Arguing About Language. Routledge. pp. 36--56.
Reasoning About Uncertain Conditionals.Niki Pfeifer - 2014 - Studia Logica 102 (4):849-866.

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Citations of this work BETA

Relevance and Conditionals: A Synopsis of Open Pragmatic and Semantic Issues.Niels Skovgaard-Olsen - forthcoming - In S. Elqayam, Igor Douven, J. Evans & N. Cruz (eds.), Festschrift for David Over. Routledge.

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