Wittgenstein: Meaning and Mind, Part 2 Exegesis §§243-427 explores and clarifies the patterns, developments, and conclusions of Wittgensteins arguments in §§243-427 ofPhilosophical Investigations. Each numbered remark in Wittgensteins text is systematically analysed. Problematic expressions, phrases and sentences are clarified, source remarks in WittgensteinsNachlass that shed light on the text are elaborated. The bearing of the remarks on deep philosophical problems is made clear.

This volume of exegesis of §§243-427 has been extensively revised, incorporating numerous references to original and secondary texts of Wittgenstein that were not known to exist in 1990. New comprehensive tables of correlation between the remarks of theInvestigations and the source of the remarks in theNachlass have been added. A variety of controversies of the last quarter of a century concerning the private language arguments, the nature of thought and imagination, consciousness and the self are addressed and settled explicitly or implicitly in the new exegesis. All references to Wittgensteins text have been adjusted to the fourth edition, although page references to the first and second editions have been retained in parenthesis.

These revisions bring the book up to the high standard of the extensively revised editions ofWittgenstein: Understanding and Meaning (2005) andWittgenstein: Rules, Grammar and Necessity (2009). They ensure that this survey ofInvestigations§§243-427 will remain the essential reference work on Wittgensteins masterpiece for the foreseeable future.

P. M. S. Hacker is the leading authority on the philosophy of Wittgenstein. He is author of the four-volumeAnalytical Commentary on the Philosophical Investigations (1980-96), the first two volumes co-authored with G.P. Baker, and of the epilogueWittgenstein's Place in Twentieth Century Analytic Philosophy (Blackwell, 1996). He has written extensively on philosophy and neurosciencePhilosophical Foundations of Neuroscience (Blackwell, 2003) andHistory of Cognitive Neuroscience (Wiley Blackwell, 2008), both co-authored with M.R. Bennett. He has published three volumes of a tetralogy on human nature:Human Nature: The Categorial Framework (Blackwell, 2007),The Intellectual Powers: A Study of Human Nature (Wiley Blackwell, 2013), andThe Passions: A Study of Human Nature (Wiley Blackwell, 2018). He is currently completing the final volume The Moral Powers: A Study of Human Nature (forthcoming). Together with Joachim Schulte, he has produced the fourth edition and extensively revised translation of Wittgenstein'sPhilosophical Investigations (Wiley Blackwell, 2009). They are currently working on a new edition and translation of Wittgenstein'sOn Certainty.