P. M. S. HACKER is an Emeritus Fellow at St John’s College, Oxford, and one of the world’s leading authorities on the philosophy of Wittgenstein. He has authored 25 books and over 175 papers, with significant contributions to the philosophy of language, mind, and neuroscience. His works include Philosophical Foundations of Neuroscience (co-authored with M. R. Bennett) and the four-volume Human Nature series.