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Inverse View
It is not the case that Block and Fodor's inference from the conceptual coherence of the qualia inversion scenario to its possibility is questionable
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Reasons For
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Reason for
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1.
The move from conceptual coherence to possibility is not logically valid
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2.
A proposition can be conceptually coherent yet metaphysically impossible
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Reasons Against
2 perspectives
Reason against 1 of 2
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1.
Kripke's work on necessary a posteriori truths shows conceptual coherence of 'water is not H2O' does not entail its possibility.
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2.
Phenomenal concepts like 'inverted qualia' may pick out physical states rigidly, making inversion scenarios coherent but impossible.
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3.
If phenomenal terms are rigid designators of functional-physical states, their apparent conceivability reflects epistemic, not metaphysical, gaps.
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Reason against 2 of 2
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1.
Chalmers' own two-dimensional semantics distinguishes primary from secondary intensions, allowing coherence without metaphysical possibility.
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2.
Block and Fodor conflate primary-intension coherence with secondary-intension possibility, a distinction Chalmers' framework explicitly prohibits.
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