Synthesized answer
The provided passages describe a new edition of the first volume of G.P. Baker and P.M.S. Hacker’s reference work on Wittgenstein's *Philosophical Investigations*. The revisions include new essays and updated exegesis that take into account previously unavailable material and electronic publications of Wittgenstein's Nachlass [2].
However, the passages do not specify what questions remain unanswered regarding Wittgenstein's *Philosophical Investigations*. They focus on the content and revisions of the commentary itself, rather than posing or answering specific questions from Wittgenstein's work.
Synthesized from the book passages below. Chat with the book on Feynman for follow-up.
From the book
asterpiece for the foreseeable future. Categories: Philosophy Snippet: This is a new edition of the first volume of G.P.Baker and P.M.S. Hacker’s definitive reference work on Wittgenstein’s Philosophical Investigations.
Title: Wittgenstein: Understanding and Meaning by Gordon P. Baker, P. M. S. Hacker Description: This is a new edition of the first volume of G.P.Baker and P.M.S. Hacker’s definitive reference work on Wittgenstein’s Philosophical Investigations. New edition of the first volume of the monumental four-volume Analytical Commentary on the Philosophical Investigations. Takes into account much material that was unavailable when the first edition was written. Following Baker’s death in 2002, P.M.S. Hacker has thoroughly revised the first volume, rewriting many essays and sections of exegesis…