Ludwig Wittgenstein's Philosophical Investigations presents his own distillation of two decades of intense work on the philosophies of mind, language and meaning. When first published in 1953, it immediately entered the center of philosophical debate, and achieved a classic status it has retained ever since. This revised German-English edition is published on the fiftieth anniversary of Wittgenstein's death. It incorporates final revisions by G. E. M. Anscombe (1919 - 2001) to her original English translation. No distribution rights for this book is available outside the USA and North America.