Erkenntnis:1-38 (forthcoming)

Justin D'Ambrosio
Australian National University
In this paper I present an empirical solution to the puzzle of Macbeth's dagger. The puzzle of Macbeth's dagger is the question of whether, in having his fatal vision of a dagger, Macbeth sees a dagger. I answer this question by addressing a more general one: the question of whether perceptual verbs are intensional transitive verbs (ITVs). I present seven experiments, each of which tests a collection of perceptual verbs for one of the three features characteristic of ITVs. One of these features is Nonexistence: the failure of sentences involving transitive verbs to entail the existence of their direct objects. The experiments reveal that with respect to all three of these features, "see" behaves much more like a paradigmatically extensional verb than an intensional one. But surprisingly, unlike "see", "perceive" behaves much more like a paradigmatically intensional verb. This shows that the category of perceptual verbs is not uniform with respect to the features of intensionality; while Macbeth does not see a dagger, he may still perceive one.
Keywords perceptual reports  intensionality  macbeth's dagger  hallucination  nonexistence
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DOI 10.1007/s10670-020-00253-0
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References found in this work BETA

Reference and Consciousness.J. Campbell - 2002 - Oxford University Press.
The Intrinsic Quality of Experience.Gilbert Harman - 1990 - Philosophical Perspectives 4:31-52.
Perception: A Representative Theory.Frank Jackson - 1977 - Cambridge University Press.
Seeing And Knowing.Fred Dretske - 1969 - Chicago: University Of Chicago Press.

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