The disjunction introduction rule: Syntactic and semantics considerations



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Publicado: 01-12-2015


  • Miguel López Astorga (CL) Universidad de Talca, Chile


The mental logic theory claims that the disjunction introduction rule, which is a valid rule in classic logic, is not a rule naturally used by human mind. However, a study carried by Orenes and Johnson-Laird suggests that this theory is wrong because there are cases in which the disjunction introduction rule appears to be applied by individuals. Orenes and Johnson-Laird explain their results based on the mental models theory. Nevertheless, in this paper, I try to show that, if it is assumed that people recover, by means of a semantic analysis of possibilities, the real logical forms of propositions before using formal rules, the mental logic theory can also explain the results achieved by Orenes and Johnson-Laird. Likewise, I include some comments on the possibility that both theories are complementary and related.

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Agencias de apoyo  

This paper is a result of the Project N. I003011, “Algoritmos adaptativos e inferencias lógicas con enunciados condicionales”, supported by the Directorate for Research of Talca University (Dirección de Investigación de la Universidad de Talca), Chile.

Cómo citar

López Astorga, M. (2015). The disjunction introduction rule: Syntactic and semantics considerations. Pragmalingüística, (23), 142–150.

Biografía del autor/a

Miguel López Astorga, Universidad de Talca, Chile

Académico en el Instituto de Estudios Humanísticos "Juan Ignacio Molina", Universidad de Talca

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