The compatibility of this principle with self-knowledge has been argued both for and against by slow-switching arguments, which require that somebody unknowingly changes worlds.
The "active" form of this principle was introduced using the example of Otto, who must consult his notebook to find a museum. The compatibility of this principle with self-knowledge has been argued both for and against by slow-switching arguments, which require that somebody unknowingly changes worlds. In one argument for this principle, Jane claims to have arthritis in her thigh, despite really having tharthritis. Another paper, arguing for the semantic rather than content form of this principle, introduces division of linguistic labor to explain an example about the inability to distinguish a beach from an elm, which appears after an example that uses the fact that "water" is a rigid designator, and thus doesn't refer to XYZ. For 10 points, name this principle argued for in the Twin Earth thought experiment, summarized as "meanings just ain't in the head".
The "active" form of this principle was introduced using the example of Otto, who must consult his notebook to find a museum.
externalism [accept more specific answers]