Appiah's canonical example of cosmopolitan dialogue across genuine moral difference — his conversation with a devout Muslim friend in Kumasi about the ethics of homosexuality, which did not resolve and did not need to.
Appiah has told the story across decades of his work: a conversation with a friend in Kumasi, his childhood home in Ghana, about the ethics of homosexuality. The friend was a devout Muslim. Appiah is openly gay. The conversation did not resolve in agreement. It could not have — the two men occupied fundamentally different moral positions, grounded in different religious traditions, different accounts of human nature, different understandings of what a good life requires. They did not persuade each other. They did not need to. What they did was something more valuable: they stayed in the conversation. They continued to speak honestly, to listen with genuine attention, to acknowledge the reality of the other's position without pretending to share it. The conversation made the disagreement habitable. It is the paradigm case of what Appiah means by cosmopolitan conversation — and the diagnostic contrast by which the limits of human-AI interaction become visible.