 In 1980, Oxford philosophers G.P. Baker and P.M.S. Hacker launched the first volume of an analytical commentary on Wittgenstein’s Investigations. This gigantic project, spanning over 4 volumes (the 3rd and 4th written by Hacker alone), advocated and developed the orthodox reading of Wittgenstein’s later work, according to which a systematic mapping – an overview, or Übersicht (Cf. PI 122) – of the use of our words is not only possible but also necessary, if we wish to dissolve the philosophical problems arising from the traditional philosophical inattention to ordinary use, due to a prior metaphysical requirement. For Baker and Hacker, a key notion for reading Wittgenstein’s later philosophy is that of philosophical ‘grammar.’ Acute attention to grammatical rules of use offers a way to elucidate meanings and thus to expose philosophical blunders.