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    'Clark Kent' and 'Superman' present the same individual u... — Carmelics
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    Challenges→Sentences (17) and (18) do not differ in meaning

    'Clark Kent' and 'Superman' present the same individual under distinct cognitive guises, making them semantically non-interchangeable in intensional contexts.

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    1 reason for
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    Reasons For

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    Reason for
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    • 1.Lois Lane can rationally believe Superman is trustworthy while doubting Clark Kent's reliability, showing the names pick out distinct cognitive contents.
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    • 2.Substituting 'Superman' for 'Clark Kent' in 'Lois wonders if Clark Kent is Superman' changes truth conditions, proving non-interchangeability in intensional contexts.
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    • 3.The epistemic difference between knowing someone's civilian identity and knowing their superhero identity is metaphysically significant, not merely ignorance of facts.
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    Reasons Against

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    • 1.Non-interchangeability in intensional contexts reflects only de re/de dicto distinctions about how we reference individuals, not semantic properties of the names themselves.
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    • 2.All apparent cognitive differences reduce to what agents believe about the referent; the names' meanings are identical if they both rigidly designate the same person.
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    • 3.Frege's sense/reference distinction doesn't establish semantic non-interchangeability—it explains why co-referential terms can differ in cognitive utility or informativeness.
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    Truth & Knowledge1 linkedPhilosophy of Language1 linked

    Related

    All apparent cognitive differences reduce to what agents believe about the refer...Frege's sense/reference distinction doesn't establish semantic non-interchangeab...Lois Lane can rationally believe Superman is trustworthy while doubting Clark Ke...Non-interchangeability in intensional contexts reflects only de re/de dicto dist...
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    Sentences (17) and (18) do not differ in meaningSubstituting 'Superman' for 'Clark Kent' in 'Lois wonders if Clark Kent is Super...The epistemic difference between knowing someone's civilian identity and knowing...

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