semantic externalism

philosophy

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July 21, 2026

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Semantic externalism is a philosophical concept that suggests the meaning of words or the content of our thoughts is not solely determined by internal mental states. Instead, it is influenced by factors external to the individual, such as the environment and the linguistic community.

This contrasts with internalism, which posits that meaning is entirely contained within an individual's mind. For example, the meaning of the word "water" might be tied to the actual substance H₂O in the external world, not just an internal idea of water. This idea challenges the notion that we can fully understand meaning by introspection alone.123

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Hilary Putnam
Realism and meaning
This conception, known as semantic externalism, can therefore serve as a basis for an objective account of truth and knowledge. Consequently, it can also support realism—and was indeed employed by Putnam (and many others after him) to that end.
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This conception, known as semantic externalism, can therefore serve as a basis for an objective account of truth and knowledge. Consequently, it can also support realism—and was indeed employed by Putnam (and many others after him) to that end.
Read More