In this thesis we focus on the relationship between language and logic, to try to find potential primitives of thought.
We depart from a well-established linguistic theory (the theory of exhaustification), which claims higher importance of logic in the understanding of language, and we first focus on a paradigmatic case included in the theory, the meaning of words with logical valence. We studied their development in preschoolers and the systematicity of their meanings according to the logical context in adults. In the second part of the experimental work, we investigate a vital subcomponent of the theory: how entailment relationships are understood by preschoolers and adults. Finally, we take the first steps to study entailment relationships non-linguistically.
Our results indicate a pervasive role of logic in language and open up a promising line of research in which language is used to access thought.
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