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Wilferd is a professor in the Oriental Institute at the University of Oxford. His research interests are: early and medieval Islam; political, religious and intellectual history; Islamic sects, especially Shi'a and Kharijites; Arabic alchemy.
Ralph is a professor in the Department of Philosophy at Merton College, University of Oxford. His research interests are ethics (especially metaethics), epistemology and related issues in metaphysics, and the philosophy of language.
