The Wharton School experiment led by Christian Terwiesch in 2023 took moral dilemmas of the kind Appiah addresses in his New York Times Magazine ethics column and presented them to GPT-4. Evaluators rated the machine's responses as more moral, more trustworthy, more thoughtful than the philosopher's. The implications unsettled the discourse: if a machine can produce ethical guidance indistinguishable from one of the world's most accomplished moral philosophers, what does the philosopher possess?
Appiah's The Ethics of Identity provides the rigorous account. The individual possesses a value not conferred by social arrangement and not revocable by it. This is the moral foundation of human rights: the recognition that each person has inherent dignity — a specificity, an irreplaceability, a perspective that no other person and no combination of persons can replicate. The dignity does not reside in what the person can do. It resides in what the person is — a being with a particular history, particular attachments, particular stakes in the world.
This is not a semantic distinction. It is the distinction between a parrot that can pronounce the word fire and a person who smells smoke. The knowledge is embodied. It is biographically specific. Cognitive scientist Gary Marcus, responding to the studies, articulated the objection precisely: "It seems to me wrongheaded to assume that the average judgment of crowd workers casually evaluating a situation is somehow more reliable than Appiah's judgment." The crowd workers assessed the product. They could not assess the process by which the product was generated.
The broader crisis the framework illuminates is this: the outputs of individual intelligence are being reproduced at scale by machines that do not possess individual intelligence. Appiah's response is not to deny the capability of the machines but to insist that the value of the individual does not depend on the individual's monopoly over a particular output. What changes is the locus of value. It migrates from the output to the judgment that directed it.
The concept is developed most fully in The Ethics of Identity (2005) and The Lies That Bind: Rethinking Identity (2018). The AI-era application emerged through Appiah's 2025 Atlantic essay and the cultural reaction to the Wharton and UNC Chapel Hill studies that tested GPT-4 against his ethics column responses.
Capability versus identity. The machine can replicate what the individual does. It cannot occupy what the individual is. The distinction is ontological, not technical.
Value migrates to judgment. When AI commoditizes output, individual value does not disappear — it relocates to the capacity to evaluate, discriminate, and choose.
Dignity is not contingent on market position. The node's worth is not identical with economic productivity. The market's valuation is not the final arbiter of human worth.
The human who uses the tool wisely. The comparison that matters is not between human and machine but between two versions of the same person — the one who engages wisely and the one who does not.