[Revised entry by T. Parent on September 6, 2024.
Changes to: Main text, Bibliography, supplement2.html]
Externalism in the philosophy of mind contends that the meaning or content of a thought[1] is partly determined by the environment. The view has garnered attention since it denies the traditional assumption, associated with Descartes, that thought content is fixed independently of the external world. Apparently under this assumption, Descartes also believed that he could know the content of his thoughts while suspending all…

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