  Revisionists say that the target of the critique of 160e–186e is everything that has been said in support and development of D1 ever since 151. Unitarians argue that Plato’s criticism of D1 in 160e–186e is more selective. Obviously his aim is to refute D1, the equation of knowledge with perception. But that does not oblige him to reject the account of perception that has been offered in support of D1. And Plato does not reject this account: he accepts it.