Academic environments are generally characterised by the presence of peole who claim to understand more than in fact they do. Linguistic Philosophy has produced a great revolution, generating people who claim not to understand when in fact they do. Some achieve great virtuosity at it. Any beginner in philosophy can manage not to understand, say, Hegel, but I have heard people who were so advanced that they knew how not to understand writers of such limpid clarity as Bertrand Russell or A.J. Ayer.