William Lycan is an internationally renowned American philosopher whose work since the late 1960s has been not only extensive but also influential, particularly in the areas of philosophy of mind, epistemology, philosophy of language, metaphysics, and more recently metaphilosophy. This contributed volume features high-quality contributions by prominent or up-and-coming philosophers who critically examine many aspects of Lycan’s work; it also contains an essay by Lycan responding to these contributions. In this way, not only is the importance of William Lycan’s work appreciated, it is also made accessible for further research. The book is also suitable for teaching purposes at universities.