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Language is primarily a tool for communication rather than thought


Evidence from neuroscience and related fields suggests that language and thought processes operate in distinct networks in the human brain and that language is optimized for communication and not for complex thought.

This fMRI investigation establishes distributed sensitivity to cognitive demands associated with lexical access, syntactic structure building and semantic composition across the language network. Patients with acquired damage to the language network display aphasia and linguistic deficits (including severe grammatical difficulties) but perform at the level of neurotypical control participants on diverse numerical reasoning tasks. A person with acquired damage to the language network and consequent aphasia exhibits linguistic deficits but performs at the level of neurotypical control participants on theory of mind tasks.

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