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Hannes Leitgeb (born June 26, 1972, Salzburg) is an Austrian philosopher and mathematician. He is Professor of Philosophy at the Ludwig Maximilian University of Munich and has received a Humboldt Professorship in 2010. His areas of research include logic (theories of truth and modality, paradox, conditionals, nonmonotonic reasoning, dynamic doxastic logic), epistemology (belief, inference, belief revision, foundations of probability, Bayesianism), philosophy of mathematics (structuralism, informal provability, abstraction, criteria of identity), philosophy of language (indeterminacy of translation, compositionality), cognitive science (symbolic representation and neural networks, metacognition), philosophy of science (empirical content, measurement theory), and history of philosophy (logic