"Manet's Bar is controversially celebrated as one of the most spectacular representations of reflected rear-viewing, but it is difficult to say why we should visualize it in such terms. The mirror's frame is barely visible and none of the supposed duplications adds up. Yet one of the reasons why the picture appeals as much as it does is that the spectator wobbles delightfully between looking forward and seeing backwards."
Jonathan Miller, On Reflection, Yale University Press, 1998