Cora Diamond (born 1937 in New York City) is an American philosopher who works on Ludwig Wittgenstein, Gottlob Frege, moral philosophy, political philosophy, philosophy of language, and philosophy and literature. She is currently the Kenan Professor of Philosophy Emerita at the University of Virginia.
One of Diamond's most famous articles, What Nonsense Might Be, criticizes the way that the logical positivists think about nonsense on Fregean grounds. (See category mistake.) Another well-known article, Eating Meat and Eating People, examines the rhetorical and philosophical nature of contemporary attitudes towards animal rights. Diamond's writings on both "early" (Tractatus Logico-Philosophicus era) and "late" (Philosophical Investigations era) Wittgenstein have made her the leading influence on the New Wittgenstein taken up by James F. Conant, Thomas Ricketts, and others.
Diamond has published a collection of essays titled The Realistic Spirit: Wittgenstein, Philosophy, and the Mind. She is the editor of Wittgenstein's Lectures on the Foundations of Mathematics: Cambridge 1939, a collection of lectures assembled from the notes of Wittgenstein's students Norman Malcolm, Rush Rhees, Yorick Smythies, and R.G. Bosanquet.