John Collins is Professor of Philosophy at the University of East Anglia. His work focuses on the philosophy of language, with especial reference to the status and results of generative linguistics. He also researches on truth, propositions, and various issues in the philosophy of mind. He is the author of many papers, and the books Chomsky: A Guide for the Perplexed (Continuum, 2008) and The Unity of Linguistic Meaning (OUP, 2011). Tamara Dobler is EU Marie Curie Postdoctoral Fellow at University of Amsterdam. She has written articles on Wittgenstein and context-sensitivity, and her current research focuses on formal modelling of occasion-sensitivity of declarative and interrogative sentences. Charles Travis is Professor Emeritus in Philosophy at King's College, London. He is the author of many journal articles and numerous books, including, most recently, Perception: Essays after Frege (OUP 2013) and Objectivity and the Parochial (OUP 2010).