Philosophical Investigations <p>New editions of the Commentary on Wittgenstein¿s <i>Philosophical Investigations </i>from Wiley-Blackwell <p><b>Wittgenstein: Understanding and Meaning,<br> Volume 1 of An Analytical Commentary<br> on the Philosophical Investigations<br> Part I: Essays</b><br> G. P. Baker and P. M. S. Hacker<br> Second, extensively revised edition by P. M. S. Hacker <p><b>Wittgenstein: Understanding and Meaning,<br> Volume 1 of An Analytical Commentary<br> on the Philosophical Investigations<br> Part II: Exegesis ¿¿1¿184</b><br> G. P. Baker and P. M. S. Hacker<br> Second, extensively revised edition by P. M. S. Hacker <p><b>Wittgenstein: Rules, Grammar and Necessity,<br> Volume 2 of An Analytical Commentary<br> on the Philosophical Investigations<br> Essays and Exegesis of ¿¿185¿242</b><br> G. P. Baker and P. M. S. Hacker<br> Second, extensively revised edition by P. M. S. Hacker <p>Immediately upon its posthumous publication in 1953, Ludwig Wittgenstein¿s <i>Philosophic