If externalism eliminates the content divergence Inverted Earth requires to generate its conclusion, then the scenario fails to sidestep the objection and instead inherits a deeper semantic vulnerability.

?Rate how convincing each reason is below to see the overall strength.

No one has weighed in yet. Be the first to share reasons for or against this statement.

Content divergence(the main issue being discussed): A situation where what an experience feels like (phenomenal character) differs from what it's actually referring to (representational content).
Externalism(Philosophy of linguistics): The view that the forms of actually attested expressions — sentences, phrases, syllables, and systems of such units — are the proper object of linguistic inquiry
Inverted Earth(Philosophy of mind; thought experiment attributed to Ned Block): A thought experiment in which an individual is placed on a planet where the colors of objects are systematically inverted relative to Earth (e.g., the sky is yellow, grass is red), but the individual's visual system is also inverted so that their functional responses remain identical to those of an Earth person — used to test externalist and functionalist theories of mental content and qualia.
Semantic vulnerability(philosophy of language)

Based on where you are in your exploration